• 1.
Supersonic jet causes pollution by thinning of

a
O3 layer
b
O2 layer
c
SO2 layer
d
CO2 layer

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 2.
Cement is formed by strongly heating a mixture of

a
limestone and graphite
b
limestone and clay
c
d
clay and graphite

Explanation:
Subject:
GENERAL SCIENCE
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
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
Comment · 0 ·
• 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
Comment · 0 ·
• 6.
The iron ore which contains 72% of iron is:

a
Magnetite
b
Limonite
c
Haematite
d
Siderite

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 7.
Non-stick kitchenwares are coated with

a
PVC
b
Graphite
c
Teflon
d
Silicon

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 8.
Sea weeds are important source of

a
iron
b
chlorine
c
bromine
d
iodine

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 9.
Bone ash contains

a
Calcium sulphate
b
Phosphoric sulphate
c
Calcium phosphate
d
Calcium acetate

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 10.
Acid secretion is characteristic of

a
Buccal cavity
b
Stomach
c
Small intestine
d
Large intestine

Explanation:
Subject:
GENERAL SCIENCE
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
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
Comment · 0 ·
• 13.
Tar roads get damaged if there is

a
b
heavy traffic
c
no maintenance
d
no sloping

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 14.
The drug Marijuana is a

a
sedative
b
mental stimulant
c
hallucinating substance
d
tranquillizer

Explanation:
Subject:
GENERAL SCIENCE
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
Comment · 0 ·
• 16.

Commercial Vaseline is derived from

a
plant gums
b
coal tar
c
wool wax
d
petroleum

Explanation:
Subject:
GENERAL SCIENCE
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
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
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
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
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
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
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
Comment · 0 ·
• 24.
The most important ore of lead is

a
Galena
b
Magnetite
c
Pyrolusite
d
Siderite

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 25.

The most reactive among the halogens is

a
Fluorine
b
Chlorine
c
Bromine
d
Iodine

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 26.
KMnO4 can be used as a/an

a
insecticide
b
fertiliser
c
pesticide
d
disinfectant

Explanation:
Subject:
GENERAL SCIENCE
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
Comment · 0 ·
• 28.
Oxygen has (+) oxidation number only in

a
OF2
b
Cl2O
c
H2O
d
N2O

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 29.
Natural rubber is the polymer of:

a
Isoprene
b
Styrene
c
d
Ethylene

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 30.
An electric iron has a heating element made of:

a
Copper
b
Tungsten
c
Nichrome
d
Zinc

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 31.
Which of the following is used to increase the anti-knocking property of petrol?

a
b
c
d

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 32.
Bakelite is a copolymer of phenol and

a
Formaldehyde
b
Acetaldehyde
c
Benzaldehyde
d
Cinnaldehyde

Explanation:
Subject:
GENERAL SCIENCE
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
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
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
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
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
Comment · 0 ·
• 38.
Find the odd one:

a
Marble
b
Chalk
c
Limestone
d
Slaked lime

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 39.
“Fire – fighting clothes” are made from

a
Mica
b
Asbestos
c
Talc
d
Steatite

Explanation:
Subject:
GENERAL SCIENCE
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
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
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
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
Comment · 0 ·
• 44.
Which one of the following is known as the $browncoal$?

a
Anthracite
b
Bituminous
c
Coke
d
Lignite

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 45.
A matured mammalian cell with out nucleus is

a
Lymphocyte
b
Erythrocyte
c
Spermatozoan
d
Oocyte

Explanation:
Subject:
GENERAL SCIENCE
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
Comment · 0 ·
• 47.
Charcoal is used in water treatment as a/an

a
absorbent
b
coagulant
c
solvent
d

Explanation:
Subject:
GENERAL SCIENCE
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
Comment · 0 ·
• 49.

a
deuterium
b
polonium
c
tritium
d
uranium

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 50.
An element that does not occur in nature but can be produced artificially is

a
thorium
b
c
plutonium
d
uranium
Explanation:
Subject:
GENERAL SCIENCE