Class 9 |Science|Chapter 1: Matter in Our Surroundings

Quiz
•
Science, Chemistry
•
9th Grade
•
Hard
Anurag Pancholi
Used 1K+ times
FREE Resource
22 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
(i) Increasing pressure on hydrogen contained in a closed container
(ii) Some hydrogen gas leaking out of the container
(iii) Increasing the volume of the container of hydrogen gas
(iv) Adding more hydrogen gas to the container without increasing the volume of the container
(i) and (iii)
(i) and (iv)
(ii) and (iii)
(ii) and (iv)
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment:
Air is heavier than bromine
Both air and bromine have the same density
Bromine is heavier than air
Bromine cannot be heavier than air because it is going upwards against gravity
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is
Krypton
Kerosene
Carbon steel
Carbon dioxide
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which one of the following statements is not true?
The molecules in a solid vibrate about a fixed position
The molecules in a liquid are arranged in a regular pattern
The molecules in a gas exert negligibly small forces on each other, except during collisions
The molecules of a gas occupy all the space available
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The correct procedure of heating iron-sulphur mixture to prepare iron sulphide is:
Heat the powder mixture at the base of the test tube using a blue flame throughout.
Heat the iron filings and sulphur mixture in the middle of the test tube using yellow flame throughout.
Heat the powder mixture at the top of the test tube using an orange flame throughout.
Heat the iron filings-sulphur mixture at 3/4 quarters of the test tube using a red flame throughout.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When water at 0°C freezes to form ice at the same temperature of 0°C, then it:
Absorbs some heat
Releases some heat
Neither absorbs nor releases heat
Absorbs exactly 3.34 x 105J/kg of heat
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When heat is constantly supplied by a burner to boiling water, then the temperature of water during vaporisation :
Rises very slowly
Rises rapidly until steam is produced
First rises and then becomes constant
Does not rise at all
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