Chemistry - Questions and Answers, General Study (GK)

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161.

A catalyst used in the hydrogenation of oils is

(a)Ni

(b)Fe

(c)V₂O₅

(d)Pt

Comment

Answer is: ANA

162.

Enzyme catalysis is an example of

(a)Induced catalysts

(b)Auto catalysts

(c)Heterogeneous catalysts

(d)Homogeneous catalysts

Comment

Answer is: CNA

163.

Glucose or fructose is converted into C2H2OH in the presence of

(a)Zymase

(b)Maltase

(c)Invertase

(d)Diastase

Comment

Answer is: ANA

164.

A catalyst poison is essentially

(a)An auto catalyst

(b)An inhibitor

(c)A homogeneous

(d)A heterogeneous

Comment

Answer is: CNA

165.

The reaction in Zeolite catalysis depend upon

(a)Size of cavities

(b)Aperture

(c)Pores

(d)All of these

Comment

Answer is: CNA

166.

If a refrigerator's door is kept open, then

(a)Room will be cooled

(b)Room will be heated

(c)Room may get cooled or heated depending upon the water

(d)No effect

Comment

Answer is: BNA

167.

Which of the following is a closed system?

(a)Jet engine

(b)Tea placed in steel kettle

(c)Pressure cooker

(d)Rocket engine during propulsion

Comment

Answer is: BNA

168.

Entropy change of a system and its surrounding in equilibrium

(a)Increases

(b)Decreases

(c)Remains constant

(d)Either increase or decrease

Comment

Answer is: CNA

169.

In which of the following the entropy decreases?

(a)Crystallisation of sucrose from solution

(b)Rusting of iron

(c)Melting of ice

(d)Vaporization of camphor

Comment

Answer is: ANA

170.

During the evaporation of a liquid

(a)The enthalpy decreases

(b)The enthalpy increases

(c)The internal energy decreases

(d)The enthalpy remain unchanged

Comment

Answer is: BNA

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Chemistry - Questions and AnswersPage 17

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