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Home
Questions & Answer
Science Questions & Answers
Chemistry Questions & Answers
Chemistry Questions & Answers
(Compiled from UPSC, SSC ,PSC ,IBPS previous question papers)
Atomic number is equal to
A
Number of electrons
B
Number of nutron
C
Number of protons
D
Total number of protons and neutrons
The most electronegative element among the following is
A
sodium
B
bromine
C
fluorine
D
oxygen
Which one of the following metals does not react with water to produce Hydrogen?
A
Cadmium
B
Lithium
C
Potassium
D
Sodium
The oxide of Nitrogen used in medicine as anaesthetic is ?
A
Nitrogen pentoxide
B
Nitrous oxide
C
Nitric oxide
D
Nitrogen dioxide
Aspirin is
A
acetyl salicylic acid
B
sodium salicylate
C
methyl salicylate
D
ethyl salicylate
Water drops are spherical because of ?
A
viscosity
B
density
C
polarity
D
surface tension
The chemical used as a fixer in photography is ?
A
sodium thiosulphate
B
sodium sulphate
C
borax
D
ammonium sulphate
Which is also called Stranger Gas ?
A
Xenon
B
Neon
C
Argon
D
Nitrous oxide
Which one of the following gas is readily soluble in water at room temperature ?
A
chlorine
B
nitrogen
C
ammonia
D
carbon dioxide
Which have the maximum density ?
A
Water
B
Benzene
C
Ice
D
Chloroform
Which one of the following is the softest?
A
sodium
B
iron
C
aluminium
D
lithium
pH of water is
A
5
B
6
C
7
D
8
pH of blood is ?
A
10.4
B
9
C
7.4
D
4
Who proposed first atomic theory ?
A
E.Rutherford
B
De Broglie
C
John Dalton
D
D.I.Mendeleef
Natural rubber is a polymer derived from ?
A
ethylene
B
propylene
C
isoprene
D
butadiene
Washing soda is ?
A
sodium sulphite
B
sodium bicarbonate
C
sodiun carbonate
D
sodium biosulphite
Air contains maximum amount of
A
oxygen
B
nitrogen
C
hydrogen
D
carbon dioxide
Homo nuclear molecules contain ?
A
polar bond
B
covalent bond
C
ionic bond
D
coordinate bond
Human bone does not contain
A
calcium
B
carbon
C
oxygen
D
phosphorous
The isotope atoms differ in ?
A
number of protons
B
atomic number
C
number of electrons
D
atomic weight
What nucleus of atom contains ?
A
protons
B
electrons
C
electrons and protons
D
protons and neutrons
Nail polish remover contains ?
A
benzene
B
acetic acid
C
acetone
D
petroleum ether
What is a mixture of potassium nitrate powdered charcoal and sulphur called?
A
paint
B
aluminium
C
brass
D
gun powder
Which metal is heaviest ?
A
osmium
B
mercury
C
iron
D
nickle
Bleaching action of chlorine is by
A
decomposition
B
hydrolysis
C
reduction
D
oxidation
What is Calcium sulphate ?
A
epsom salt
B
blue vitriol
C
gypsum salt
D
potash alum
Which is used in preparation of dynamite ?
A
glycerol
B
ethyl alcohol
C
methyl alcohol
D
glycol
Oil of vitriol is
A
nitric acid
B
sulphuric acid
C
hydrochloric acid
D
phosphoric acid
What among following is used to produce artificial rain ?
A
copper oxide
B
carbon monoxide
C
silver iodide
D
silver nitrate
The term PVC used in the plastic industry stands for
A
polyvinyl chloride
B
polyvinyl carbobate
C
phosphor vanadiu chloride
D
phosphavinyl chloride
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