Have you ever wondered that everything we confront is made of matter? Everything is composed of matter, from the air and water to humans themselves. Matter is something that occupies space and has some mass. We can further classify matter into pure and impure. A substance made of a single kind of substance that can not be further divided is known as a pure substance. In contrast, a substance that is made of more than one kind of substance and can be further divided is known as an impure substance.
Download Class 9 Chemistry Worksheet on Chapter 2 Is Matter Around Us Pure Set 1 PDF
CBSE Class 9 Chemistry Chapter 2 Is Matter Around Us Pure Worksheet – Set 1
Q1. Which of the following will exhibit the Tyndal effect?
(a) Saltwater
(b) Sugar water
(c ) Soap water
(d) None of the above
Q2. Which of the following is solute in the tincture of iodine?
(a) Iodine
(b) Sulphuric acid
(c ) Sodium hydroxide
(d) None of the above
Q3. Sugar water is an example of
(a) True solution
(b) False solution
(c ) Standard solution
(d) None of the above
Q4. A tincture of iodine is a mixture of
(a) Iodine in potassium iodide solution
(b) Iodine in sodium iodide solution
(c ) Iodine in ethanol
(d) None of the above
Q5. Blood and water are examples of
(a) Mixture
(b) Compound
(c ) Both (a) and (b)
(d) None of the above
Q6. What sort of mixtures can be isolated by crystallisation?
Q7. What do you mean by the terms solute and solvent?
Q8. Why are alloys regarded as mixtures?
Q9. What will happen if a saturated solution is cooled?
Q10. What is a homogeneous mixture? Give some examples.
Q11. What are the applications of centrifugation?
Q12. Name a technique that can be used to separate butter from curd?
Q13. What do you understand by the term tincture of iodine?
Q14. Is water an element or a compound? Justify your answer.
Q15. Name any two elements that exist in the liquid state at standard conditions.
Q16. Why can true solution particles not be seen by the naked eye?
Q17. Draw a well-labelled diagram to show fractional distillation.
Q18. Name any two methods that can be used to isolate a solid-solid mixture.
Q19. How will you differentiate the compound from the mixture?
Q20. How will you separate a mixture containing kerosene and petrol (the difference in their boiling points is more than 25o C), which are miscible with each other?
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