• 1.
The substance most commonly used as a food preservatives is

a
sodium carbonate
b
tartaric acid
c
acetic acid
d
sodium salt of benzoic acid

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 2.
Alum stops bleeding in minor cuts because of

a
solvation
b
emulsion
c
dialysis
d
coagulation

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 3.
Water can be separated from alcohol water mixture by

a
decantation
b
evaporation
c
distillation
d
sublimation

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 4.

a
it is highly inflammable
b
it is the lightest gas
c
it is absorbed by plants
d
it immediately combines with oxygen to form water

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 5.
For determination of the age of which among the following is carbon dating method used?

a
Fossils
b
Rocks
c
Trees
d
1 & 2 above

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 6.
A substance which readily forms colloidal solution in contact with water is called

a
Extrinsic colloid
b
Associated colloid
c
Hydrophobic colloid
d
Hydrophilic colloid

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 7.
When conc.H2SO is added to dry KNO3, brown fumes are evolved. These fumes are due to

a
SO3
b
SO2
c
NO2
d
N2O

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 8.
The polymer used in making plastic crockery is

a
Decron
b
Nylon
c
Bakelite
d
Melamine

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 9.
Preparation of Dalda or Vanaspati ghee from vegetable oil utilizes the following process:

a
Hydrolysis
b
Oxidation
c
Hydrogenation
d
Ozonolysis

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 10.
Which of the following chemicals is used in photography?

a
Aluminium hydroxide
b
Silver bromide
c
Potassium nitrate
d
Sodium chloride

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 11.
Which gas is used as fire extinguisher?

a
Carbon dioxide
b
carbon monoxide
c
carbon suboxide
d
sulpur dioxide

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 12.
Cream gets separated out of milk when it is churned. This is due to

a
gravitational force
b
centripetal force
c
centrifugal force
d
frictional force

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 13.
The Lustre of the metals is because of

a
high density, due to closed packing of atoms
b
high polish
c
reflection of light due to the presence of free electrons
d
absorption of light due to the presence of cavities

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 14.
Pasteurisation is the process which milk is heated to

a
600C for 10 minutes
b
630C for 20 minutes
c
630C for 30 minutes
d
720C for 10 minutes

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 15.
The freezer in a refrigerator fitted near the top

a
to keep it away from hot compressor which is nearer to the botton
b
because of convenience
c
it facilities convection currents
d
to minimise power consumption

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 16.
Denatured spirit is ethanol mixed with

a
Petrol
b
Kerosene
c
Water
d
Pyridine

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 17.
The most abundant inert gas in the atmosphere is

a
Helium
b
Neon
c
Argon
d
Krypton

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 18.
Which metal is extracted from sea water?

a
Potassium
b
Magnesium
c
Aluminium
d
Beryllium

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 19.
Water is not effective in extinguishing a fire caused by petrol because

a
the flame is too hot for water to cool it down
b
water and petrol react chemically
c
water and petrol are miscible with each other
d
water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 20.
Ruby and sapphire are oxides of

a
copper
b
tin
c
iron
d
aluminium

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 21.
The gas which turns into liquid at the lowest temperature among the following is

a
hydrogen
b
oxygen
c
helium
d
nitrogen

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 22.
Detergents clean surface on the principle of

a
viscosity
b
surface tension
c
elasticity
d
floatation

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 23.
Ammonial is a mixture of

a
aluminium powder and ammonium nitrate
b
aluminium powder and ammonium chloride
c
aluminium powder and ammonium sulphate
d
aluminium powder and ammonium nitrate

Explanation:
Subject:
GENERAL SCIENCE
Comment · 1 ·
• 24.
White coal is

a
Uranium
b
Hydro-electricity
c
Diamond
d
Ice

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 25.
The residue left after extracting juice from sugarbeet and sugarcane is called

a
molasses
b
bagasse
c
whey
d
biomass

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 26.
Candle is a mixture of

a
paraffin was and stearic acid
b
Bees wax and stearic acid
c
Higher fatty acids and stearic acid
d
Bees wax and paraffin wax

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 27.
Aqua regia is a 1:3 mixture, by volume, of

a
conc. nitric acid and conc. Hydrochloric acid
b
conc. Hydrochloric acid and conc. nitric acid
c
conc. nitric acid and conc. Sulphuric acid
d
conc. Sulphuric acid and conc. nitric acid

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 28.
What is the maximum Water Vapour content in the atmosphere?

a
2 to 3 per cent
b
3 to 4 per cent
c
4 to 5 per cent
d
5 to 6 per cent

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 29.
The amount of chlorine available in water after disinfection is called as

a
free chlorine
b
residual chlorine
c
free available chlorine
d
combined available chlorine

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 30.

Nuclear energy is a mineral based energy source, It is derived from

a
uranium
b
thorium
c
plutonium
d
All of the above

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 31.
Zinc sulphate is commonly used as

a
fungicide
b
herbicide
c
rodenticide
d
deodorant

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 32.
Aspirin is chemically known as

a
methyl salicylate
b
hydroxysalicylate
c
acetylsalicylic acid
d
alkylsalicylic acid

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 33.
Wax used for making candle is chemically a mixture  of

a
aliphatic hydrocarbons
b
aromatic  hydrocarbons
c
cyclic hydrocarbons
d
aliphatic and aromatic hydrocarbons

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 34.
Photo oxidation process is initiated by

a
light
b
heat
c
oxygen
d
catalyst

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 35.
Major gaseous pollutant of the thermal power station is

a
H2S
b
NH3
c
NO2
d
SO2

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 36.
Mortar is a mixture of water, sand and

a
Slaked lime
b
Quick lime
c
Limestone
d
Gypsum

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 37.
Which of the following substance is highly plastic?

a
Quartz
b
Mica
c
Granite
d
Clay

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 38.
The National Chemical Laboratory (India) is located in

a
Mumbai
b
Bangaluru
c
d
Pune

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 39.
Which of the following metals does not react with water to produce Hydrogen?

a
Potassium
b
c
Sodium
d
Lithium

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 40.
One of the constituents of tear gas is

a
Ethane
b
Ethanol
c
Ether
d
Chloropicrin

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 41.
Silver halides are used in photographic plates because they are

a
oxidised in air
b
soluble in hyposolution
c
reduced by light
d
totally colourless

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 42.

a
a catalyst in burning fossil fuel
b
an antioxidant
c
a reductant
d
an antiknock compound

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 43.
If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by

a
Mercury
b
c
Iron
d
Arsenic

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 44.
Detergents are

a
sodium salts of fatty acids
b
sodium salts of sulphuric acids
c
sodium salt of benzoic acid
d
None of the above

Explanation:
Subject:
GENERAL SCIENCE
Comment · 1 ·
• 45.

The chemical(s) most commonly used for cloud seeding or $art\phantom{\rule{1ex}{0ex}}if\phantom{\rule{1ex}{0ex}}icialra\in mak\in g$ is/are

a
Silver Iodide
b
Sodium Chloride
c
Dry ice or frozen carbon dioxide
d
All the above

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 46.
The noble gas used in radiotherapy is

a
neon
b
argon
c
d
xenon

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 47.
White phosphorus is always kept under

a
benzene
b
kerosene
c
ether
d
water

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 48.
Galena is a mineral of

a
iron
b
gold
c
d
calcium

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 49.
Magnalium is an alloy of

a
Aluminium and Magnesium
b
Magnesium and Tin
c
Aluminium and Zinc
d
Manganese and Magnesium

Explanation:
Subject:
GENERAL SCIENCE
Comment · 0 ·
• 50.

Cooking gas is a mixture of

a
methane and ethylene
b
carbon dioxide and oxygen
c
butane and propane
d
carbon monoxide and carbon dioxide
Explanation:
Subject:
GENERAL SCIENCE