True-False

Question 11 Mark

Deliquescent substances do not change their physical state on exposure to air.

Answer

False.
Correct statement: Deliquescent substances change its physical state on exposure to air.

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Question 21 Mark

Hygroscopic substances do not change their physical state on exposure to air.

Answer

True.

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Question 31 Mark

Mass percentage is dependent of temperature.

Answer

False.
Correct statement: Mass percentage is independent of temperature.

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Question 41 Mark

Aquatic animals live more in hot regions.

Answer

False.
Correct statement: Aquatic animals live more in cold regions.

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Question 51 Mark

40 g of sodium chloride in 100 g of water at 25°C forms an unsaturated solution.

Answer

False.
Correct statement: 40 g of sodium chloride in 100 g of water at 25°C forms a supersaturated

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Question 61 Mark

36 g of sodium chloride in 100 g of water at 25°C forms a saturated solution.

Answer

True.

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Question 71 Mark

Covalent compounds are soluble in water.

Answer

False.
Correct statement: Covalent compounds are insoluble in water.

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Question 81 Mark

Ether act as a universal solvent.

Answer

False.
Correct statement: Water acts universal solvent.

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Question 91 Mark

$SO _2$ gas is filled in soft drinks using the effect of pressure.

Answer

False.
Correct statement: $CO _2$ gas is filled in soft drinks using the effect of pressure.

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Question 101 Mark

The solubility of oxygen is more in cold water.

Answer

True.

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Question 111 Mark

The solubility of CaO increases with the increase in temperature.

Answer

False.
Correct statement: The solubility of CaO decreases with the increase in temperature.

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Question 121 Mark

In an exothermic process, solubility decreases with increase in temperature.

Answer

True.

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Question 131 Mark

In an endothermic process, solubility decreases with increase in temperature.

Answer

False.
Correct statement: In an endothermic process, solubility increases with increase in temperature.

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Question 141 Mark

100 ml of water can dissolve 36 g of NaCl at 25°C to attain saturation.

Answer

True.

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Question 151 Mark

The solubility of CuSO4 in H2O is 36 g at 25°C.

Answer

False.
Correct statement: Solubility of $CuSO _4$ in $H _2 O$ is $20.7 g$ at $20^{\circ} C$.

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Question 161 Mark

Nitrogen in soil is an example of a supersaturated solution.

Answer

False.
Correct statement: Nitrogen in the soil is an example of a saturated solution.

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Question 171 Mark

The solution of sulphur in CS2 is a suitable example of a non-aqueous solution.

Answer

True.

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Question 181 Mark

The solution in which water acts as a solvent, it is called a non-aqueous solution.

Answer

False.
Correct statement: The solution in which water acts as a solvent, it is called an aqueous

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Question 191 Mark

A solution contains four components, it is called as a binary solution.

Answer

Correct statement: A solution contains two components, it is called as a binary solution.

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Question 201 Mark

A solution is a heterogeneous mixture of two or more substances.

Answer

Correct statement: A solution is a homogeneous mixture of two or more substances.

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