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1. Question marks are mentioned with each Question.
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1
Which of the following is an example of colloidal solution ?
Milk
Ink
Blood
All of these.
2
The solubility of a gas in a liquid increases with the __________________in pressure.
Increases
Decreases
No change
None of these.
3
A homogeneous mixture among the following is:
Muddy water
Smoke
Air
4
As temperature increases, the solubility of a solid substance _____________________.
Any of these.
5
Which of the following is the example of the liquid - liquid mixture .
Sugar solution
Milk and sugar
Water and Milk
None of these
6
The amount of solute dissolved in a ___________________ of a solution is known as the concentration or strength of the solution.
Mass
Volume
Unit quantity
7
Pure substances are defined as _______________________.
The substance is made up of only one type of constituent particles.
The substance is made up of only two type of constituent particles.
The substance is made up of many type of constituent particles.
None of the above
8
The solubility of ____________________ in a liquid generally decreases with the rise in temperature.
Sodium Chloride
Calcium acetate.
Calcium sulphate.
Only (b) and (c) are correct.
9
As temperature increases, the solubility of a gases also _________________.
Both (a) and (b) are correct.
10
Which of the following metal is liquid at room temperature ?
Copper
Zinc
Mercury
Lead
11
The amount of a solute in grams dissolved in _______ grams of a solvent to make a saturated solution is called the solubility.
1000 gm
100 gm
200 gm
50 gm
12
What is the mass by mass percentage of the saturated solution of ammonium chloride when 40g of ammonium chloride is added to 320g of water?
66%
33%
11.1%
24.81%
13
Which of the following statements is true about the colloidal solution?
Colloids are homogeneous solution
The particle size in colloids is more than suspension
The particles in colloids are not distributed uniformly
Colloids show Tyndall effect
14
With increase in temperature solubility of gas in water _________________
decreases
remain the same
fluctuates
15
Which of the following is true regarding mixtures :
(1) Soft drinks (lemonade, soda water, etc.) that you see in your daily life are also not pure substances but are homogeneous mixtures.
(2) Tincture of iodine which is used as an antiseptic is a mixture of iodine and ethanol.
(3) Air is a mixture of oxygen, nitrogen, carbon dioxide, water vapour, etc.
Only (1) is true
Only (2) is true
Only (1), (2) are true
All are true