Online Test of Chapter 2 Is Matter Around us Pure 1 Science| Class 9th

Questions:

1. After heating common salt and ammonium chloride for a few minutes, we can observe the following on the upper part of the inverted funnel:
(a) reddish brown deposit.
(b) water droplets
(c) a white solid deposit
(d) a yellow gas

2. Which of the following is a metalloid?
(a) Germanium
(b) Gallium
(c) Carbon
(d) Sodium

3. Who was the first person to use the term element?
(a) Robert Boyle
(b) Lavoisier
(c) Dalton
(d) Charle’s

4. The mixture will appear translucent in case of:
(a) CuSO4 + water
(b) alum + water
(c) sugar + water
(d) starch + water

5. Which of the following is not a noble gas?
(a) Helium
(b) Neon
(c) Argon
(d) Hydrogen

6. When a beam of light is passed through a colloidal solution, it gets:
(a) reflected
(b) absorbed
(c) scattered
(d) refracted

7. Size of colloidal particles in a solution is
(a) more than 100 nm
(b) less than 1 nm
(c) between 1 to 100 nm
(d) between 100 to 1000 nm

8. Which of the following is not a compound?
(a) marble
(b) washing soda
(c) quick lime
(d) brass

9. On heating a mixture of iron fillings and sulphur, it is observed that:
(a) the mixture sublimes
(b) a grey mass is formed
(c) brown fumes are evolved
(d) no change occurs

10. An atom is
(a) the smallest particle of matter known
(b) the smallest particle of a gas
(c) the smallest indivisible particle of an element that can take part in a chemical change
(d) radioactive emission

11. The number of metals which exist as gas is/are
(a) one
(b) two
(c) three
(d) none

Chapter 2 Is Matter Around Us Pure Quiz 1| Class 9th

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