Quiz 3- Chemistry-General Science: General Knowledge Question & Answers

21 Q) What type of reaction is carried out by the lipase in the digestion of fats?

(a) Reduction

(b)Dehydration

(c)Hydrolysis

(d)Calcification

Show Answer

C

22 Q) "Assertion (A) Lithium is used in the light weight electrical batteries of the type found in clocks and watches. Reason (R) The mass of Li required to release 1 mole of electron is so small. "

(a)Both A and R are true and R is the correct explanation of A

(b)Both A and R are true but R is not the correct explanation of A

(c)A is true but R is false

(d)A is false but R is true

Show Answer

A

23 Q) Which one of the following compounds is frequently found packed with drying tubes?

(a)Calcium sulphate

(b)Magnesium chloride

(c)Calcium chloride

(d)Sodium thiosulphate

Show Answer

C

24 Q) "Metal used to make wires for safety fuses must have "

(a) very low resistivity and high melting point

(b) high resistivity and low melting point

(c) low resistivity and low melting point

(d) high resistivity and high melting point

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B

25 Q) Which of the following is not a natural polymer?

(a)Wool

(b) Silk

(c) Cotton

(d) Teflon

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D

26 Q) The ultra pure metal is obtained by

(a) calcination

(b) sublimation

(c) zone refining

(d) None of these

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C

27 Q) "Which one among the following polymers is used to make personal armour such as combat helmets, ballistic face masks, and ballistic vests?"

(a) Teflon

(b) PVC

(c) Bakelite

(d) Kevlar

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D

28 Q) "Assertion (A) A buffer solution is a mixture of a strong acid and its conjugate base or a strong base and its conjugate acid. Reason (R) Buffer solutions keep the pH at a nearly constant value."

(a)Both A and R are true and R is the correct explanation of A

(b)Both A and R are true but R is not the correct explanation of A

(c)A is true but R is false

(d)A is false but R is true

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D

29 Q) "Which of the following gases in the atmosphere is/are responsible for acid rains? I. Oxides of sulphur II. Oxides of nitrogen III. Oxides of carbon Select the correct answer using the codes given below"

(a) I and II

(b) I and III

(c) Only II

(d) All of these

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A

30 Q) Match the Following 

List l	List II
(Elements)	(Ores/Minerals)
A. Copper	1. Corundum, Bauxite
B. Iron	2. Malachite, Azurite
C. Lead	3. Galena, Lanarkite
D. Aluminium	4. Haematite,Limonite

(a) 2 4 3 1

(b) 2 3 4 1

(C) 4 3 1 2

(d) 4 1 3 2

Show Answer

A