Chemistry - Questions and Answers, General Study (GK)

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511.

A Solution which contains the maximum amount of the solute that can be dissolved in a given amount of solvent at a particular temperature is called

(a)Saturated solution

(b)Unsaturated solution

(c)Supersaturated solution

(d)None of the above

Comment

Answer is: A

512.

A hard shell of an egg was dissolved in HCl. The egg was then placed in a concentration solution of NaCl. What will happen?

(a)The egg will shrink

(b)The egg will swell

(c)The egg will become harder

(d)There will be hardly any visible change

Comment

Answer is: A

513.

Artificial rain is caused by spraying

(a)Similar charged colloidal dust over a cloud

(b)Neutral charged colloidal dust over a cloud

(c)Both 1 and 2

(d)Opposite charged colloidal dust over a cloud

Comment

Answer is: D

514.

Medicines are more effective, if the are used in

(a)Gaseous state

(b)Colloidal state

(c)Solid state

(d)Solution state

Comment

Answer is: B

515.

Consider the following statements.
1. During the pressure of osmosis, the solvent travels form the concentrated solution to the dilute solution.
2. In the reverse osmosis, external pressure is applied to the dilute Solution.
Which of the statement given above is/are correct?

(a)Only 1

(b)Only 2

(c)Both 1 and 2

(d)Neither 1 nor 2

Comment

Answer is: D

516.

Which one of the following statements is not correct?

(a)The boiling point of an aqueous solution is highter than that of pure water

(b)Addition of solutes to a solution causes an increase in its water potential

(c)The vapour pressure of the water in a solution is/lower than that of pure water

(d)When a solution is separated from water by a semi-permeable membrane water movement

Comment

Answer is: B

517.

Farmers are requested to mix lime with soil while farming their fields. This is because

(a)Lime is very helpful in maintaining the water content in the soil

(b)Lime decreases the acidity of soil

(c)Lime decreases the basicity of soil

(d)High concentration of lime is necessary for plant growth

Comment

Answer is: B

518.

Two reactions with different activation energies have the same rate at room temperature. Which statement correctly describes the rates of these reactions at the same higher temperature?

(a)The reaction with the greater activation energy will be faster

(b)The reaction with the smaller activation will be faster

(c)The two reactions will have the same retes

(d)A prediction cannot be made without more information

Comment

Answer is: B

519.

Which of the following represent a chemical change?
1. Magnetization of iron.
2. Condensation of liquid.
3. Burning of fuel.
4. Rusting of iron.
Select the correct answer using the codes given below.

(a)1 and 2

(b)2 and 3

(d)1 and 4

Comment

Answer is: C

520.

In the Haber's process of synthesis of NH₃.

(a)Mo acts as a catalyst and Fe as a promotor

(b)Fe acts as a catalyst and Mo as a promotor

(c)Fe acts as a inhibitor and Mo as a catalyst

(d)Fe acts as promoter and Mo as auto catalyst

Comment

Answer is: B

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Chemistry - Questions and AnswersPage 52

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