Chemistry - Questions and Answers, General Study (GK)

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431.

What is the jeweller's rouge?

(a)Ferric carbonate

(b)Ferrous carbonate

(c)Ferrous oxide

(d)Ferric oxide

Comment

Answer is: DNA

432.

'Freon' used as refrigerants are chemically known as

(a)Chlorofluoro hydrocarbon

(b)Fluorinated aromatic compound

(c)Fluorinated hydrocarbon

(d)Chlorinated hydrocarbon

Comment

Answer is: ANA

433.

The temperature to which a gas must be cooled before it can be liquefied by compression is called

(a)Boyle's temperature

(b)Critical temperature

(c)Liquefaction temperature

(d)Inversion temperature

Comment

Answer is: D

434.

Which of the gases will have the highest rate of diffusion?

(a)O₂

(b)CO₂

(c)NH₃

(d)N₂

Comment

Answer is: C

435.

Consider the following statements
1. Particles of matter are continuously moving.
2. As the temperature rises, particles more faster.
3. With increase in temperature the kinetic energy of particle also increases.
Which of the statements given above are correct?

(a)1 and 2

(b)2 and 3

(d)1, 2 and 3

Comment

Answer is: D

436.

At very low temperature, oxygen O₂, freezes and form a crystalline solid. Which term best describes the solid?

(a)Covalent network

(b)Molecular crystlas

(c)Metallic

(d)Ionic

Comment

Answer is: B

437.

At constant temperature, the product of pressure and volume of a given amount of a gas is constant. This is

(a)Gay-Lussac law

(b)Charle's law

(c)Boyle's law

(d)Pressure law

Comment

Answer is: C

438.

Consider the following statements
1. Amorphous solids do not have sharp melting points.
2. Amorphous solids are solids are isotropic.
3. Amorphous have same mechanical strength, electrical and optical properties in all directions.
Which of the above is/are true about amorphous solids?

(a)Only 1

(b)Only 2

(d)1, 2 and 3

Comment

Answer is: D

439.

Consider the following statements
1. Dry ice is the solid form of CO₂.
2. Dry ice is used primarily as a cooling agent.
3. Simple ice is cooler than dry ice.
Which of the statements give above is/are correct.

(a)Only 1

(b)Only 2

(d)1, 2 and 3

Comment

Answer is: C

440.

As its cools, olive oil slowly solidifies and forms a solid over a wide range of temperature. Which term describe.

(a)Ionic

(b)Covalent network

(c)Metallic

(d)Molecular crystal

Comment

Answer is: D

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Chemistry - Questions and AnswersPage 44

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