Chemistry Test

1.

Supersonic jet causes pollution by thinning of

a

O3 layer

b

O2 layer

c

SO2 layer

d

CO2 layer

Explanation:

Subject:
GENERAL SCIENCE

83.33% users answered right

Correct Answer: a
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2.

Cement is formed by strongly heating a mixture of

a

limestone and graphite

b

limestone and clay

c

chalk and graduate

d

clay and graphite

Explanation:

Subject:
GENERAL SCIENCE

57.14% users answered right

Correct Answer: b
Comment · 0 ·
3.

For generation of biogas, the materials commonly used are

a

Animal wastes

b

Crop residues

c

Aquatic plants

d

carbon and iron

Explanation:

Subject:
GENERAL SCIENCE

57.14% users answered right

Correct Answer: a
Comment · 0 ·
4.

The BOD values of water indicate the

a

amount of organic debris

b

amount of oxygen used for biochemical oxidation

c

amount of oxygen used for biochemical reduction

d

amount of ozone used for biochemical oxidation

Explanation:

Subject:
GENERAL SCIENCE

33.33% users answered right

Correct Answer: b
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5.

Which of the following produces highest amount of energy upon oxidation/

a

Protein

b

Fat

c

Glucose

d

An alkane

Explanation:

Subject:
GENERAL SCIENCE

66.67% users answered right

Correct Answer: b
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6.

The iron ore which contains 72% of iron is:

a

Magnetite

b

Limonite

c

Haematite

d

Siderite

Explanation:

Subject:
GENERAL SCIENCE

14.29% users answered right

Correct Answer: a
Comment · 0 ·
7.

Non-stick kitchenwares are coated with

a

PVC

b

Graphite

c

Teflon

d

Silicon

Explanation:

Subject:
GENERAL SCIENCE

42.86% users answered right

Correct Answer: c
Comment · 0 ·
8.

Sea weeds are important source of

a

iron

b

chlorine

c

bromine

d

iodine

Explanation:

Subject:
GENERAL SCIENCE

42.86% users answered right

Correct Answer: d
Comment · 0 ·
9.

Bone ash contains

a

Calcium sulphate

b

Phosphoric sulphate

c

Calcium phosphate

d

Calcium acetate

Explanation:

Subject:
GENERAL SCIENCE

66.67% users answered right

Correct Answer: c
Comment · 0 ·
10.

Acid secretion is characteristic of

a

Buccal cavity

b

Stomach

c

Small intestine

d

Large intestine

Explanation:

Subject:
GENERAL SCIENCE

42.86% users answered right

Correct Answer: b
Comment · 0 ·
11.

Stag is a name given for

a

molten iron

b

molten sand

c

molten alumina

d

molten calcium silicate

Explanation:

Subject:
GENERAL SCIENCE

50.00% users answered right

Correct Answer: c
Comment · 0 ·
12.

Which one of the following is used as a sowing agent in the preparation of soft drinks?

a

phosphoric acid

b

phosphorous acid

c

Salicylic acid

d

Boric acid

Explanation:

Subject:
GENERAL SCIENCE

33.33% users answered right

Correct Answer: a
Comment · 0 ·
13.

Tar roads get damaged if there is

a

stagnation of water on road

b

heavy traffic

c

no maintenance

d

no sloping

Explanation:

Subject:
GENERAL SCIENCE

57.14% users answered right

Correct Answer: a
Comment · 0 ·
14.

The drug Marijuana is a

a

sedative

b

mental stimulant

c

hallucinating substance

d

tranquillizer

Explanation:

Subject:
GENERAL SCIENCE

16.67% users answered right

Correct Answer: a
Comment · 0 ·
15.

The material known in commerce as Terylene is a

a

Synthetic fibre

b

Natural fibre

c

Modified natural fibre

d

Blend of cotton and silk

Explanation:

Subject:
GENERAL SCIENCE

33.33% users answered right

Correct Answer: a
Comment · 0 ·
16.

Commercial Vaseline is derived from

a

plant gums

b

coal tar

c

wool wax

d

petroleum

Explanation:

Subject:
GENERAL SCIENCE

66.67% users answered right

Correct Answer: d
Comment · 0 ·
17.

A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?

a

From brown to blue-black

b

From brown to orange-red

c

From blue to pink

d

From pink to blue –green

Explanation:

Subject:
GENERAL SCIENCE

33.33% users answered right

Correct Answer: a
Comment · 0 ·
18.

Tear gas used by the police to disperse the mob contains

a

Carbon dioxide

b

Chlorine

c

Ammonia

d

Hydrogen sulphide

Explanation:

Subject:
GENERAL SCIENCE

16.67% users answered right

Correct Answer: b
Comment · 0 ·
19.

The charcoal used to decolourise brown sugar solution is

a

Wood charcoal

b

Coconut charcoal

c

Animal charcoal

d

Sugar charcoal

Explanation:

Subject:
GENERAL SCIENCE

42.86% users answered right

Correct Answer: c
Comment · 0 ·
20.

Vinegar is a commercial name of

a

Oxalic acid

b

Hydrochloric acid

c

Acetic acid

d

Citric acid

Explanation:

Subject:
GENERAL SCIENCE

85.71% users answered right

Correct Answer: c
Comment · 0 ·
21.

The fungus which is used in the alcohol industry is

a

Mushroom

b

Candida Aibicans

c

Yeast

d

Rhizopus

Explanation:

Subject:
GENERAL SCIENCE

71.43% users answered right

Correct Answer: c
Comment · 0 ·
22.

Conduction band electrons have more mobility than holes because they

a

are lighter

b

experience collision less frequently

c

have negative charge

d

need energy to move them

Explanation:

Subject:
GENERAL SCIENCE

16.67% users answered right

Correct Answer: b
Comment · 0 ·
23.

The gas that usually causes explosions in coal mines is

a

Hydrogen

b

Carbon monoxide

c

Air

d

Methane

Explanation:

Subject:
GENERAL SCIENCE

71.43% users answered right

Correct Answer: d
Comment · 0 ·
24.

The most important ore of lead is

a

Galena

b

Magnetite

c

Pyrolusite

d

Siderite

Explanation:

Subject:
GENERAL SCIENCE

57.14% users answered right

Correct Answer: a
Comment · 0 ·
25.

The most reactive among the halogens is

a

Fluorine

b

Chlorine

c

Bromine

d

Iodine

Explanation:

Subject:
GENERAL SCIENCE

42.86% users answered right

Correct Answer: a
Comment · 0 ·
26.

KMnO4 can be used as a/an

a

insecticide

b

fertiliser

c

pesticide

d

disinfectant

Explanation:

Subject:
GENERAL SCIENCE

50.00% users answered right

Correct Answer: d
Comment · 0 ·
27.

Burning pyrites ore gives out

a

Carbon dioxide gas

b

Sulphur dioxide gas

c

Nitrogen dioxide gas

d

Nitric oxide gas

Explanation:

Subject:
GENERAL SCIENCE

16.67% users answered right

Correct Answer: b
Comment · 0 ·
28.

Oxygen has (+) oxidation number only in

a

OF2

b

Cl2O

c

H2O

d

N2O

Explanation:

Subject:
GENERAL SCIENCE

33.33% users answered right

Correct Answer: a
Comment · 0 ·
29.

Natural rubber is the polymer of:

a

Isoprene

b

Styrene

c

Butadiene

d

Ethylene

Explanation:

Subject:
GENERAL SCIENCE

57.14% users answered right

Correct Answer: a
Comment · 0 ·
30.

An electric iron has a heating element made of:

a

Copper

b

Tungsten

c

Nichrome

d

Zinc

Explanation:

Subject:
GENERAL SCIENCE

42.86% users answered right

Correct Answer: c
Comment · 0 ·
31.

Which of the following is used to increase the anti-knocking property of petrol?

a

Tetramethyl lead

b

Tetraethyl lead

c

Trimethyl lead

d

Triethyl lead

Explanation:

Subject:
GENERAL SCIENCE

28.57% users answered right

Correct Answer: b
Comment · 0 ·
32.

Bakelite is a copolymer of phenol and

a

Formaldehyde

b

Acetaldehyde

c

Benzaldehyde

d

Cinnaldehyde

Explanation:

Subject:
GENERAL SCIENCE

14.29% users answered right

Correct Answer: a
Comment · 0 ·
33.

When a spoon is to be electroplated with nickel the spoon is

a

dipped in a nickel sulphate solution

b

made anode and a pure nickel rod, the cathode

c

made cathode and a pure nickel, red, the anode

d

coated with nickel sulphate and dried

Explanation:

Subject:
GENERAL SCIENCE

14.29% users answered right

Correct Answer: c
Comment · 0 ·
34.

The gas used to dilute oxygen for breathing by deep sea divers is:

a

Neon

b

Argon

c

Nitrogen

d

Helium

Explanation:

Subject:
GENERAL SCIENCE

42.86% users answered right

Correct Answer: d
Comment · 0 ·
35.

Bleaching powder is prepared by passing;

a

Chlorine over slaked lime

b

Oxygen over slaked lime

c

Carbon dioxide over slaked lime

d

Chlorine over quick lime

Explanation:

Subject:
GENERAL SCIENCE

57.14% users answered right

Correct Answer: a
Comment · 0 ·
36.

Permanent – hardness of water may be removed by addition of

a

Alum

b

Sodium carbonate

c

Lime

d

Potassium permanganate

Explanation:

Subject:
GENERAL SCIENCE

83.33% users answered right

Correct Answer: b
Comment · 0 ·
37.

Which of the following processes is used for the production of Biodiesel?

a

Transamination

b

Transcription

c

Transesterification

d

Translation

Explanation:

Subject:
GENERAL SCIENCE

60.00% users answered right

Correct Answer: c
Comment · 0 ·
38.

Find the odd one:

a

Marble

b

Chalk

c

Limestone

d

Slaked lime

Explanation:

Subject:
GENERAL SCIENCE

20.00% users answered right

Correct Answer: d
Comment · 0 ·
39.

“Fire – fighting clothes” are made from

a

Mica

b

Asbestos

c

Talc

d

Steatite

Explanation:

Subject:
GENERAL SCIENCE

20.00% users answered right

Correct Answer: b
Comment · 0 ·
40.

Water gas is the mixture of

a

carbon dioxide and hydrogen

b

carbon monoxide and nitrogen

c

carbon monoxide and hydrogen

d

carbon dioxide and nitrogen

Explanation:

Subject:
GENERAL SCIENCE

16.67% users answered right

Correct Answer: a
Comment · 1 ·
41.

Which of the following causes the rusting of iron?

(A) Oxidation

(B) Reduction

(C) Chemical reaction with CO2

a

A and B

b

B and C

c

C and A

d

A and C

Explanation:

Subject:
GENERAL SCIENCE

16.67% users answered right

Correct Answer: d
Comment · 0 ·
42.

Black lung disease occurs in people working in

a

Electroplating industry

b

Organic solvents industry

c

Paint manufacturing industry

d

Coal mines

Explanation:

Subject:
GENERAL SCIENCE

40.00% users answered right

Correct Answer: d
Comment · 0 ·
43.

The chemical substances present in bones and teeth is

a

Calcium phosphate

b

Calcium chloride

c

Calcium sulphate

d

Calcium borate

Explanation:

Subject:
GENERAL SCIENCE

50.00% users answered right

Correct Answer: a
Comment · 0 ·
44.

Which one of the following is known as the $b r o w n c o a l$ ?

a

Anthracite

b

Bituminous

c

Coke

d

Lignite

Explanation:

Subject:
GENERAL SCIENCE

50.00% users answered right

Correct Answer: d
Comment · 0 ·
45.

A matured mammalian cell with out nucleus is

a

Lymphocyte

b

Erythrocyte

c

Spermatozoan

d

Oocyte

Explanation:

Subject:
GENERAL SCIENCE

20.00% users answered right

Correct Answer: b
Comment · 0 ·
46.

The most common cause of pollution of air is

a

Carbon dioxide

b

Carbon monoxide

c

Sulphur dioxide

d

Smoke

Explanation:

Subject:
GENERAL SCIENCE

33.33% users answered right

Correct Answer: c
Comment · 0 ·
47.

Charcoal is used in water treatment as a/an

a

absorbent

b

coagulant

c

solvent

d

adsorbent

Explanation:

Subject:
GENERAL SCIENCE

40.00% users answered right

Correct Answer: d
Comment · 0 ·
48.

The liquid waste from kitchens and baths, of residences is known as

a

Domestic sewage

b

Storm water

c

Sullage

d

Refuse

Explanation:

Subject:
GENERAL SCIENCE

40.00% users answered right

Correct Answer: c
Comment · 0 ·
49.

The lightest radioactive element is

a

deuterium

b

polonium

c

tritium

d

uranium

Explanation:

Subject:
GENERAL SCIENCE

50.00% users answered right

Correct Answer: c
Comment · 0 ·
50.

An element that does not occur in nature but can be produced artificially is

a

thorium

b

radium

c

plutonium

d

uranium

Explanation:

Subject:
GENERAL SCIENCE

66.67% users answered right

Correct Answer: c
Comment · 0 ·

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