Chemistry Quiz

Question1: The nucleus of an atom consists of
electrons and neutrons
electrons and protons
protons and neutrons
All of the above
Answer: Option 3

Question2: The number of moles of solute present in 1 kg of a solvent is called its
molality
molarity
normality
formality
Answer: Option 1

Question3: The most electronegative element among the following is
sodium
bromine
fluorine
oxygen
Answer: Option 3

Question4: The metal used to recover copper from a solution of copper sulphate is
Na
Ag
Hg
Fe
Answer: Option 4

Question5: The number of d-electrons in Fe2+ (Z = 26) is not equal to that of
p-electrons in Ne(Z = 10)
s-electrons in Mg(Z = 12)
d-electrons in Fe(Z = 26)
p-electrons in CI(Z = 17)
Answer: Option 4

Question6: The metallurgical process in which a metal is obtained in a fused state is called
smelting
roasting
calcinations
froth floatation
Answer: Option 1

Question7: The molecules of which gas have highest speed?
H2 at -73oC
CH4 at 300 K
N2 at 1,027oC
O2 at 0oC
Answer: Option 1

Question8: The oldest rocks in the earth’s crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock’s called
granite
basalt
igneous rocksv sedimentary rocks
Answer: Option 3

Question9: The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is
Dalton’s law
Gay Lussac’s law
Henry’s law
Raoult’s law
Answer: Option 3

Question 10: The main buffer system of the human blood is
H2CO3 – HCO3 H2CO3 – CO32-
v CH3COOH- CH3COO–
NH2CONH2 – NH2CONH+
Answer: Option 1

Question 11: The gas present in the stratosphere which filters out some of the sun’s ultraviolet light and provides an effective shield against radiation damage to living things is
helium
ozone
oxygen
methane
Answer: Option 2

Question 12: The most commonly used bleaching agent is
alcohol
carbon dioxide
chlorine
sodium chlorine
Answer: Option 3

Question 13: The nucleus of a hydrogen atom consists of
1 proton only
1 proton + 2 neutron
1 neutron only
1 electron only
Answer: Option 1

Question 14: The heat required to raise the temperature of body by 1 K is called
specific heat
thermal capacity
water equivalent
None of the above
Answer: Option 2

Question 15: The nuclear particles which are assumed to hold the nucleons together are
electrons
positrons
neutrons
mesons
Answer: Option 4

Question 16: The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is
2.05 gram
3.05 gram
4.05 gram
5.05 gram
Answer: Option 2

Question 17: The octane number of zero is assigned to
2-methyl octane
n-heptane
iso-octane
3-methyl octane
Answer: Option 2

Question 18: The metal that is used as a catalyst in the hydrogenation of oils is
Ni
Pb
Cu
Pt
Answer: Option 1

Question 19: The most abundant rare gas in the atmosphere is
He
Ne
Ar
Xe
Answer: Option 3

Question 20: The Latin word formica means ant. The name formic acid is derived from this Latin word

because

this acid, in ancient times, was used to eliminate ant-hills
this corrosive acid is secreted by ants to drive away their enemies
this acid was first obtained by the distillation of ants
ants are attracted by the odour of this acid
Answer: Option 3

Question 21: The ore which is found in abundance in India is
monazite
fluorspar
bauxite
magnetite
Answer: Option 1

Question 22: The inherited traits of an organism are controlled by
RNA molecules
nucleotides
DNA molecules
enzymes
Answer: Option 3

Question 23: The heat energy produced when the human body metabolises 1 gram of fat is
30 KJ
1 KJ
39 KJ
29 KJ
Answer: Option 3
Question 24: What are the number of moles of CO2 which contains 16 g of oxygen?
0.5 mole
0.2 mole
0.4 mole
0.25 mole
Answer: Option 1

Question 25: The main use of salt in the diet is to
make the taste of food better
produce in small amounts the hydrochloric acid required for the digestion of food
ease the process of cooking
increase the solubility of food particles in water
Answer: Option 2
Question 26: The monomer of polythene is
vinyl chloride
ethylene
ethyl alcohol
None of the above
Answer: Option 2

Question 27: The luster of a metal is due to
its high density
its high polishing
its chemical inertness
presence of free electrons
Answer: Option 4
Question 28: The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
1.568 x 103
6.023 x 1019
4.84 x 1017
6.023 x 1023
Answer: Option 2
Question 29: The most malleable metal is
platinum
silver
iron
gold
Answer: Option 4

Question 30: The oil used in the froth floatation process is
coconut oil
olive oil
kerosene oil
pine oil
Answer: Option 4

Question 31: The number of waves in n x 10th Bohr’s orbit are
n2
n
n-2
n3
Answer: Option 2

Question 32: The mass of one Avogadro number of helium atom is
1.00 gram
4.00 gram
8.00 gram
4 x 6.02 x 1023 gram
Answer: Option 2

Question 33: The items amenable to detection by soft x-rays are
contrabands
lead in bullets
narcotics
genuine coins from counterfeit coins
Answer: Option 4

Question 34: The material which can be deformed permanently by heat and pressure is called a
thermoplastic
thermoset
chemical compound
polymer
Answer: Option 2

Question 35: The mass number of a nucleus is
always less than its atomic number
the sum of the number of protons and neutrons present in the nucleus
always more than the atomic weight
a fraction
Answer: Option 2

Question 36: The inexpensive and commonly used variety of glass is called soda glass. It is called so because
was used initially for making bottles of soda(carbonated drink)
is made using soda(sodium carbonate)
was initially used for storing sodium carbonate
is made using soda lime
Answer: Option 2
Question 37: The gas used in the manufacture of vanaspati from vegetable oil is
hydrogen
oxygen
nitrogen
carbon dioxide
Answer: Option 1

Question 38: The ionic radii of N3-, O2-, F- and Na+ follows the order
N3-> O2- > F–> Na+
N3- > Na+> O2–> F–
Na+ > O2- > N3-> F–
O2- > F–> Na+ > N3–
Answer: Option 1

Question 39: The graphite rods in the nuclear reactor
react with U to release energy
produce neutrons
undergo combustion which triggers the nuclear fission
convert fast moving neutrons into thermal neutrons
Answer: Option 4

Question 40: The first metal used by man was
iron
copper
gold
bronze
Answer: Option 2

Question 41: The hydronium ion is
H+
HO –
H2+
H3O+
Answer: Option 4
Question 42: The most electropositive elements among the following is
Na
Ca
K
Cs
Answer: Option 4
Question 43: The method that cannot be used for removing permanent hardness of water is

adding sodium carbonate
distillation
adding caustic soda
boiling
Answer: Option 4
Question 44: The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?
3 billion years
100 years
0.01 minute
13 days
Answer: Option 3
Question 45: The gas used for artificial ripening of green fruit is
ethylene
ethane
carbon dioxide
acetylene
Answer: Option 1
Question 46: Zone refining is used for the purification of
Au
Ge
Ag
Cu
Answer: Option 2
Question 47: The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is
cineole
engenol
geraniol
limonene
Answer: Option 1
Question 48: The molecule which has the highest percentage of ionic character among the following is
HI
HF
HCI
HBr
Answer: Option 2
Question 49: The high reactivity of fluorine is due to
its high electro negativity
small size of fluorine atom
availability of d-orbitals
strong F – F bond
Answer: Option 1
Question 50: The iron ore magnetite consists of
Fe2O3
Fe3OH4
FeCO3
3Fe2O3 .. 3H2O
Answer: Option 1