{"id":2416,"date":"2026-05-27T22:13:13","date_gmt":"2026-05-27T16:43:13","guid":{"rendered":"https:\/\/mymockmate.com\/notes\/?p=2416"},"modified":"2026-05-27T22:13:16","modified_gmt":"2026-05-27T16:43:16","slug":"ncert-class-9-science-exploring-mixtures-and-their-separation-solutions","status":"publish","type":"post","link":"https:\/\/mymockmate.com\/notes\/ncert-class-9-science-exploring-mixtures-and-their-separation-solutions\/","title":{"rendered":"NCERT Class 9 Science Exploring Mixtures and Their Separation Solutions"},"content":{"rendered":"<div class=\"pdfprnt-buttons pdfprnt-buttons-post pdfprnt-top-bottom-right\"><a href=\"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2416?print=pdf\" class=\"pdfprnt-button pdfprnt-button-pdf\" target=\"_blank\" ><img decoding=\"async\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/plugins\/pdf-print\/images\/pdf.png\" alt=\"image_pdf\" title=\"Download PDF\" \/><span class=\"pdfprnt-button-title pdfprnt-button-pdf-title\">Save as PDF<\/span><\/a><a href=\"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2416?print=print\" class=\"pdfprnt-button pdfprnt-button-print\" target=\"_blank\" ><img decoding=\"async\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/plugins\/pdf-print\/images\/print.png\" alt=\"image_print\" title=\"Print Content\" \/><span class=\"pdfprnt-button-title pdfprnt-button-print-title\">Print<\/span><\/a> <span class=\"pdfprnt-count-generation\"><\/span><\/div>\n<h1 class=\"wp-block-heading\">Short Intro<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cExploring Mixtures and Their Separation\u201d chapter explains different types of mixtures, concentration of solutions, solubility, crystallization, distillation, chromatography, colloids, suspensions, and various separation techniques used in daily life and industries. This chapter is highly important for conceptual understanding and exam preparation. Complete step-by-step solutions are provided below in Unicode format for uploading on <a target=\"_blank\" rel=\"noreferrer noopener\">www.mymockmate.com<\/a>.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Quick Information Box<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Topic<\/th><th>Details<\/th><\/tr><\/thead><tbody><tr><td>Chapter Name<\/td><td>Exploring Mixtures and Their Separation<\/td><\/tr><tr><td>Subject<\/td><td>Science<\/td><\/tr><tr><td>Grade<\/td><td>Class 9<\/td><\/tr><tr><td>Main Topics<\/td><td>Solutions, Colloids, Separation Techniques<\/td><\/tr><tr><td>Important Concepts<\/td><td>Distillation, Crystallization, Tyndall Effect<\/td><\/tr><tr><td>Exam Importance<\/td><td>Very High<\/td><\/tr><tr><td>Numerical Problems<\/td><td>Included<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">Concepts Used (Topics Covered)<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Homogeneous and heterogeneous mixtures<\/li>\n\n\n\n<li>Solutions, suspensions and colloids<\/li>\n\n\n\n<li>Concentration of solutions<\/li>\n\n\n\n<li>Solubility and saturated solutions<\/li>\n\n\n\n<li>Crystallization<\/li>\n\n\n\n<li>Distillation and fractional distillation<\/li>\n\n\n\n<li>Paper chromatography<\/li>\n\n\n\n<li>Separating funnel<\/li>\n\n\n\n<li>Sublimation<\/li>\n\n\n\n<li>Centrifugation<\/li>\n\n\n\n<li>Coagulation<\/li>\n\n\n\n<li>Tyndall effect<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Important Formulas<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Mass by Mass Percentage<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi mathvariant=\"normal\">%<\/mi><mtext>\u2009<\/mtext><mo stretchy=\"false\">(<\/mo><mi>m<\/mi><mi mathvariant=\"normal\">\/<\/mi><mi>m<\/mi><mo stretchy=\"false\">)<\/mo><mo>=<\/mo><mfrac><mtext>Mass&nbsp;of&nbsp;solute<\/mtext><mtext>Mass&nbsp;of&nbsp;solution<\/mtext><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><\/mrow><annotation encoding=\"application\/x-tex\">\\%\\,(m\/m)=\\frac{\\text{Mass of solute}}{\\text{Mass of solution}}\\times100<\/annotation><\/semantics><\/math>%(m\/m)=Mass&nbsp;of&nbsp;solutionMass&nbsp;of&nbsp;solute\u200b\u00d7100<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mass by Volume Percentage<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi mathvariant=\"normal\">%<\/mi><mtext>\u2009<\/mtext><mo stretchy=\"false\">(<\/mo><mi>m<\/mi><mi mathvariant=\"normal\">\/<\/mi><mi>v<\/mi><mo stretchy=\"false\">)<\/mo><mo>=<\/mo><mfrac><mtext>Mass&nbsp;of&nbsp;solute<\/mtext><mtext>Volume&nbsp;of&nbsp;solution<\/mtext><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><\/mrow><annotation encoding=\"application\/x-tex\">\\%\\,(m\/v)=\\frac{\\text{Mass of solute}}{\\text{Volume of solution}}\\times100<\/annotation><\/semantics><\/math>%(m\/v)=Volume&nbsp;of&nbsp;solutionMass&nbsp;of&nbsp;solute\u200b\u00d7100<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Volume by Volume Percentage<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi mathvariant=\"normal\">%<\/mi><mtext>\u2009<\/mtext><mo stretchy=\"false\">(<\/mo><mi>v<\/mi><mi mathvariant=\"normal\">\/<\/mi><mi>v<\/mi><mo stretchy=\"false\">)<\/mo><mo>=<\/mo><mfrac><mtext>Volume&nbsp;of&nbsp;solute<\/mtext><mtext>Volume&nbsp;of&nbsp;solution<\/mtext><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><\/mrow><annotation encoding=\"application\/x-tex\">\\%\\,(v\/v)=\\frac{\\text{Volume of solute}}{\\text{Volume of solution}}\\times100<\/annotation><\/semantics><\/math>%(v\/v)=Volume&nbsp;of&nbsp;solutionVolume&nbsp;of&nbsp;solute\u200b\u00d7100<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Questions &amp; Step-by-step Solutions with Explanation<\/h1>\n\n\n\n<h1 class=\"wp-block-heading\">Question 1<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Correct classification of mixtures<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Correct Option: <strong>(iv)<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Muddy water \u2192 Heterogeneous<\/li>\n\n\n\n<li>Milk \u2192 Heterogeneous (colloid)<\/li>\n\n\n\n<li>Blood \u2192 Heterogeneous (colloid)<\/li>\n\n\n\n<li>Brass \u2192 Homogeneous alloy<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 2<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Which mixtures show Tyndall Effect?<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Correct Option: <strong>(iii) a and c<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Air + dust particles \u2192 Shows Tyndall effect<\/li>\n\n\n\n<li>Starch + water \u2192 Colloid, shows Tyndall effect<\/li>\n\n\n\n<li>Copper sulfate solution \u2192 True solution, no Tyndall effect<\/li>\n\n\n\n<li>Acetone + water \u2192 Homogeneous solution, no Tyndall effect<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 3<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Complete Table 5.2<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Type<\/th><th>Properties<\/th><th>Examples<\/th><\/tr><\/thead><tbody><tr><td>Solution<\/td><td>Small particles, transparent, does not scatter light<\/td><td>Salt solution, Brass<\/td><\/tr><tr><td>Suspension<\/td><td>Large particles, settles down, separable by filtration<\/td><td>Sand in water, Mud<\/td><\/tr><tr><td>Colloid<\/td><td>Medium particles, scatters light, does not settle<\/td><td>Milk, Smoke, Butter<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 4 (i)<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Cake recipe concentration<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Given<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sugar = 75 g<br>Flour = 420 g<br>Sodium hydrogencarbonate = 5 g<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Total Mass<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mn>420<\/mn><mo>+<\/mo><mn>75<\/mn><mo>+<\/mo><mn>5<\/mn><mo>=<\/mo><mn>500<\/mn><mtext>\u2009<\/mtext><mi>g<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">420+75+5=500\\,g<\/annotation><\/semantics><\/math>420+75+5=500g<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sugar concentration<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mfrac><mn>75<\/mn><mn>500<\/mn><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><mo>=<\/mo><mn>15<\/mn><mi mathvariant=\"normal\">%<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\frac{75}{500}\\times100=15\\%<\/annotation><\/semantics><\/math>50075\u200b\u00d7100=15%<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Flour concentration<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mfrac><mn>420<\/mn><mn>500<\/mn><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><mo>=<\/mo><mn>84<\/mn><mi mathvariant=\"normal\">%<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\frac{420}{500}\\times100=84\\%<\/annotation><\/semantics><\/math>500420\u200b\u00d7100=84%<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sodium hydrogencarbonate concentration<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mfrac><mn>5<\/mn><mn>500<\/mn><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><mo>=<\/mo><mn>1<\/mn><mi mathvariant=\"normal\">%<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\frac{5}{500}\\times100=1\\%<\/annotation><\/semantics><\/math>5005\u200b\u00d7100=1%<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sugar = 15% m\/m<\/li>\n\n\n\n<li>Flour = 84% m\/m<\/li>\n\n\n\n<li>Sodium hydrogencarbonate = 1% m\/m<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 4 (ii)<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Brass alloy composition<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Given<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Copper = 70%<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Total brass = 120 g<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Copper quantity<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mfrac><mn>70<\/mn><mn>100<\/mn><\/mfrac><mo>\u00d7<\/mo><mn>120<\/mn><mo>=<\/mo><mn>84<\/mn><mtext>\u2009<\/mtext><mi>g<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\frac{70}{100}\\times120=84\\,g<\/annotation><\/semantics><\/math>10070\u200b\u00d7120=84g<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Zinc quantity<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mn>120<\/mn><mo>\u2212<\/mo><mn>84<\/mn><mo>=<\/mo><mn>36<\/mn><mtext>\u2009<\/mtext><mi>g<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">120-84=36\\,g<\/annotation><\/semantics><\/math>120\u221284=36g<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Copper = 84 g<\/li>\n\n\n\n<li>Zinc = 36 g<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 5<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Cooking oil and water separation<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes, oil forms a separate upper layer because it is less dense than water.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Method Used<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Separating funnel<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Water settles at bottom<\/li>\n\n\n\n<li>Oil remains on top<\/li>\n\n\n\n<li>Open stopcock to separate water first<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 6<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Assertion-Reason<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Correct Option: <strong>(iii)<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Assertion is true because solutions do not scatter light.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Reason is false because solution particles are extremely small.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 7<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Separation techniques<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Mixture<\/th><th>Method<\/th><th>Reason<\/th><\/tr><\/thead><tbody><tr><td>Mud from muddy water<\/td><td>Filtration<\/td><td>Insoluble particles<\/td><\/tr><tr><td>Plasma from blood<\/td><td>Centrifugation<\/td><td>Density difference<\/td><\/tr><tr><td>Naphthalene and sand<\/td><td>Sublimation<\/td><td>Naphthalene sublimes<\/td><\/tr><tr><td>Chalk powder and salt<\/td><td>Dissolve + filtration + evaporation<\/td><td>Salt dissolves<\/td><\/tr><tr><td>Salt and water<\/td><td>Evaporation<\/td><td>Water evaporates<\/td><\/tr><tr><td>Oil and water<\/td><td>Separating funnel<\/td><td>Immiscible liquids<\/td><\/tr><tr><td>Flower pigments<\/td><td>Chromatography<\/td><td>Different movement rates<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 8<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Separation of miscible liquids A and B<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Given<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Boiling point of A = 60\u00b0C<\/li>\n\n\n\n<li>Boiling point of B = 90\u00b0C<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Distillation method is used.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Difference in boiling points is 30\u00b0C which is greater than 25\u00b0C.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Liquid A vaporises first and condenses separately.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 9<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Comparison<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Process<\/th><th>Purpose<\/th><\/tr><\/thead><tbody><tr><td>Evaporation<\/td><td>Obtain dissolved solid<\/td><\/tr><tr><td>Crystallization<\/td><td>Obtain pure crystals<\/td><\/tr><tr><td>Distillation<\/td><td>Separate liquids and recover solvent<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Preferred Situations<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Evaporation \u2192 Salt from seawater<\/li>\n\n\n\n<li>Crystallization \u2192 Pure copper sulfate crystals<\/li>\n\n\n\n<li>Distillation \u2192 Acetone-water separation<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 10<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Blood as colloid<\/h3>\n\n\n\n<h2 class=\"wp-block-heading\">(i) If blood behaved like suspension<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Blood cells would settle down causing blockage and improper circulation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">(ii) Components<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dispersed phase \u2192 Blood cells<\/li>\n\n\n\n<li>Dispersion medium \u2192 Plasma<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 11<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Correct sequence of techniques<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Sublimation<\/li>\n\n\n\n<li>Dissolution and filtration<\/li>\n\n\n\n<li>Evaporation\/crystallization<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Naphthalene separated first by sublimation<\/li>\n\n\n\n<li>Salt dissolved in water<\/li>\n\n\n\n<li>Sand filtered out<\/li>\n\n\n\n<li>Salt recovered by evaporation<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 12<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Why is distillation effective for water and acetone?<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Because their boiling points differ greatly.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Acetone boils at 56\u00b0C<\/li>\n\n\n\n<li>Water boils at 100\u00b0C<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Acetone vaporises first and gets condensed separately.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 13 (i)<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Potassium nitrate required<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Given<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Solubility at 40\u00b0C:<br>62 g per 100 g water<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For 50 g water:<br><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mfrac><mn>62<\/mn><mn>100<\/mn><\/mfrac><mo>\u00d7<\/mo><mn>50<\/mn><mo>=<\/mo><mn>31<\/mn><mtext>\u2009<\/mtext><mi>g<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\frac{62}{100}\\times50=31\\,g<\/annotation><\/semantics><\/math>10062\u200b\u00d750=31g<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">31 g potassium nitrate<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 13 (ii)<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Observation on cooling<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Potassium chloride crystals will separate out because solubility decreases on cooling.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 13 (iii)<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Effect of temperature<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Solubility generally increases with temperature.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Potassium nitrate shows maximum increase in solubility.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 14 (i)<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Concentration of sugar solutions<\/h3>\n\n\n\n<h2 class=\"wp-block-heading\">Student A<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mfrac><mn>20<\/mn><mn>100<\/mn><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><mo>=<\/mo><mn>20<\/mn><mi mathvariant=\"normal\">%<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\frac{20}{100}\\times100=20\\%<\/annotation><\/semantics><\/math>10020\u200b\u00d7100=20%<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Student B<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mfrac><mn>20<\/mn><mn>120<\/mn><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><mo>\u2248<\/mo><mn>16.67<\/mn><mi mathvariant=\"normal\">%<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\frac{20}{120}\\times100\\approx16.67\\%<\/annotation><\/semantics><\/math>12020\u200b\u00d7100\u224816.67%<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Student C<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mfrac><mn>30<\/mn><mn>110<\/mn><\/mfrac><mo>\u00d7<\/mo><mn>100<\/mn><mo>\u2248<\/mo><mn>27.27<\/mn><mi mathvariant=\"normal\">%<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\frac{30}{110}\\times100\\approx27.27\\%<\/annotation><\/semantics><\/math>11030\u200b\u00d7100\u224827.27%<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A = 20%<\/li>\n\n\n\n<li>B = 16.67%<\/li>\n\n\n\n<li>C = 27.27%<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 14 (ii)<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Most concentrated solution<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Student C\u2019s solution is most concentrated because it has highest percentage of sugar.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Question 15<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">(i) Technique S<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Distillation<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">(ii) Apparatus labels<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A \u2192 Thermometer<\/li>\n\n\n\n<li>B \u2192 Condenser<\/li>\n\n\n\n<li>C \u2192 Receiver flask<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">(iii) Mixtures separated<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Water\u2013acetone<\/li>\n\n\n\n<li>Alcohol\u2013chloroform<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Because their boiling points are sufficiently different.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Common Mistakes<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Confusing colloids with solutions<\/li>\n\n\n\n<li>Writing filtration instead of distillation<\/li>\n\n\n\n<li>Using wrong percentage formula<\/li>\n\n\n\n<li>Forgetting boiling point differences<\/li>\n\n\n\n<li>Confusing sublimation with evaporation<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Exam Tips<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Learn all separation methods with examples.<\/li>\n\n\n\n<li>Practice numerical problems on concentration.<\/li>\n\n\n\n<li>Revise Tyndall effect carefully.<\/li>\n\n\n\n<li>Remember examples of colloids and suspensions.<\/li>\n\n\n\n<li>Draw labelled diagrams for distillation and separating funnel.<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Practice MCQs<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">1. Which mixture shows Tyndall effect?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A. Sugar solution<br>B. Salt solution<br>C. Milk<br>D. Acetone and water<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C. Milk<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. Which process separates acetone and water?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A. Filtration<br>B. Distillation<br>C. Sublimation<br>D. Sedimentation<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B. Distillation<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. Which substance sublimes?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A. Sand<br>B. Salt<br>C. Camphor<br>D. Chalk powder<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C. Camphor<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. Which method separates plasma from blood?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A. Filtration<br>B. Distillation<br>C. Centrifugation<br>D. Evaporation<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C. Centrifugation<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">FAQ Section<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Q1. What is a homogeneous mixture?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A mixture having uniform composition throughout.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Q2. What is Tyndall effect?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Scattering of light by colloidal particles.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Q3. Which method separates immiscible liquids?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Separating funnel method.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Q4. What is sublimation?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Direct conversion of solid into vapour without becoming liquid.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Q5. Why is distillation used?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To separate miscible liquids with different boiling points.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prepare smarter with chapter-wise Science notes, solved numericals, MCQs, diagrams, assertion-reason questions, and complete exam-ready solutions only on <a target=\"_blank\" rel=\"noreferrer noopener\">MyMockMate<\/a>. Practice regularly and boost your exam performance with confidence!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<div class=\"pdfprnt-buttons pdfprnt-buttons-post pdfprnt-top-bottom-right\"><a href=\"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2416?print=pdf\" class=\"pdfprnt-button pdfprnt-button-pdf\" target=\"_blank\" ><img decoding=\"async\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/plugins\/pdf-print\/images\/pdf.png\" alt=\"image_pdf\" title=\"Download PDF\" \/><span class=\"pdfprnt-button-title pdfprnt-button-pdf-title\">Save as PDF<\/span><\/a><a href=\"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2416?print=print\" class=\"pdfprnt-button pdfprnt-button-print\" target=\"_blank\" ><img decoding=\"async\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/plugins\/pdf-print\/images\/print.png\" alt=\"image_print\" title=\"Print Content\" \/><span class=\"pdfprnt-button-title pdfprnt-button-print-title\">Print<\/span><\/a> <span class=\"pdfprnt-count-generation\"><\/span><\/div>\n    <div class=\"xs_social_share_widget xs_share_url after_content \t\tmain_content  wslu-style-1 wslu-share-box-shaped wslu-fill-colored wslu-none wslu-share-horizontal wslu-theme-font-no wslu-main_content\">\n\n\t\t\n        <ul>\n\t\t\t        <\/ul>\n    <\/div> \n","protected":false},"excerpt":{"rendered":"<p> Short Intro \u201cExploring Mixtures and Their Separation\u201d chapter explains different types of mixtures, concentration of<\/p>\n","protected":false},"author":3,"featured_media":2417,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_surecart_dashboard_logo_width":"180px","_surecart_dashboard_show_logo":true,"_surecart_dashboard_navigation_orders":true,"_surecart_dashboard_navigation_invoices":true,"_surecart_dashboard_navigation_subscriptions":true,"_surecart_dashboard_navigation_downloads":true,"_surecart_dashboard_navigation_billing":true,"_surecart_dashboard_navigation_account":true,"postBodyCss":"","postBodyMargin":[],"postBodyPadding":[],"postBodyBackground":{"backgroundType":"classic","gradient":""},"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[22,4,12],"tags":[1262,1257,1260,1263,1256,1261,1258,1255,1259],"class_list":["post-2416","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cbse","category-class-9","category-science","tag-chromatography-questions-answers","tag-class-9-chemistry-chapter-5","tag-class-9-science-chapter-5-solutions","tag-distillation-and-crystallization-solutions","tag-exploring-mixtures-and-their-separation-answers","tag-homogeneous-and-heterogeneous-mixtures","tag-separation-of-mixtures-mcqs","tag-solutions-suspensions-colloids-notes","tag-tyndall-effect-notes"],"jetpack_publicize_connections":[],"_links":{"self":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2416","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/comments?post=2416"}],"version-history":[{"count":2,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2416\/revisions"}],"predecessor-version":[{"id":2444,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2416\/revisions\/2444"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/media\/2417"}],"wp:attachment":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/media?parent=2416"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/categories?post=2416"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/tags?post=2416"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}