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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Question 1 of 11
1. Question
After heating common salt and ammonium chloride for a few minutes, we can observe the following on the upper part of the inverted funnel:
Correct
White deposit is of ammonium chloride which is also called sublimate.
Incorrect
White deposit is of ammonium chloride which is also called sublimate.
-
Question 2 of 11
2. Question
Which of the following is a metalloid?
Correct
Boron, silicon, germanium, arsenic, antimony, and tellurium are metalloid whose properties are intermediate between metals and non-metals.
Incorrect
Boron, silicon, germanium, arsenic, antimony, and tellurium are metalloid whose properties are intermediate between metals and non-metals.
-
Question 3 of 11
3. Question
Who was the first person to use the term element?
Correct
Robert Boyle was the first person who used the term element.
Incorrect
Robert Boyle was the first person who used the term element.
-
Question 4 of 11
4. Question
The mixture will appear translucent in case of:
Correct
It is a colloidal solution and is translucent.
Incorrect
It is a colloidal solution and is translucent.
-
Question 5 of 11
5. Question
Which of the following is not a noble gas?
Correct
Hydrogen is not a noble gas because it doesn’t complete its duplet or octet and react with other elements.
Incorrect
Hydrogen is not a noble gas because it doesn’t complete its duplet or octet and react with other elements.
-
Question 6 of 11
6. Question
When a beam of light is passed through a colloidal solution, it gets:
Correct
The scattering of beam of light on passing through colloidal solution is known as Tyndall effect.
Incorrect
The scattering of beam of light on passing through colloidal solution is known as Tyndall effect.
-
Question 7 of 11
7. Question
Size of colloidal particles in a solution is
Correct
between 100 to 1000 nm
Incorrect
between 100 to 1000 nm
-
Question 8 of 11
8. Question
Which of the following is not a compound?
Correct
Brass is a homogeneous mixture of copper and zinc.
Incorrect
Brass is a homogeneous mixture of copper and zinc.
-
Question 9 of 11
9. Question
On heating a mixture of iron fillings and sulphur, it is observed that:
Correct
The grey mass is of iron sulphide.
Incorrect
The grey mass is of iron sulphide.
-
Question 10 of 11
10. Question
An atom is
Correct
An atom is the smallest and indivisible particle of an element. It takes part in a chemical reaction.
Incorrect
An atom is the smallest and indivisible particle of an element. It takes part in a chemical reaction.
-
Question 11 of 11
11. Question
The number of metals which exist as gas is/are
Correct
No metals exist as gas.
Incorrect
No metals exist as gas.