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General Knowledge :

Chemistry




1.
The nucleus of an atom consists of

electrons and neutrons
electrons and protons
protons and neutrons
All of the above




2.
The number of moles of solute present in 1 kg of a solvent is called its

molality
molarity
normality
formality




3.
The most electronegative element among the following is

sodium
bromine
fluorine
oxygen




4.
The metal used to recover copper from a solution of copper sulphate is

Na
Ag
Hg
Fe




5.
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)




6.
The metallurgical process in which a metal is obtained in a fused state is called

smelting
roasting
calcinations
froth floatation




7.
The nucleus of a hydrogen atom consists of

1 proton only
1 proton + 2 neutron
1 neutron only
1 electron only




8.
The heat required to raise the temperature of body by 1 K is called

specific heat
thermal capacity
water equivalent
None of the above




9.
The nuclear particles which are assumed to hold the nucleons together are

electrons
positrons
neutrons
mesons




10.
     The octane number of zero is assigned to

2-methyl octane
n-heptane
iso-octane
3-methyl octane




11.
The metal that is used as a catalyst in the hydrogenation of oils is

Ni
Pb
Cu
Pt




12.
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




13.
The items amenable to detection by soft x-rays are

contrabands
lead in bullets
narcotics
genuine coins from counterfeit coins




14.
The material which can be deformed permanently by heat and pressure is called a

thermoplastic
thermoset
chemical compound
polymer




15.
   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




16.
The method that cannot be used for removing permanent hardness of water is

adding sodium carbonate
distillation
adding caustic soda
boiling




17.
The gas used for artificial ripening of green fruit is

ethylene
ethane
carbon dioxide
acetylene




18.
The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is

cineole
engenol
geraniol
limonene




19.
The molecule which has the highest percentage of ionic character among the following is

HI
HF
HCI
HBr




20.
The most extensive, commercially useful source of thorium as monazite sand occurs in India at

Orissa coast
Travancore coast
West Bengal coast
Gujarat coast










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FreshersLive - No.1 Job site in India. Here you can find latest 2016 government as well as private job recruitment notifications for different posts vacancies in India. Get top company jobs for both fresher and experienced. Job Seekers can get useful interview tips, resume services & interview Question and answer. Practice online test free which is helpful for interview preparation. Register with us to get latest employment news/rojgar samachar notifications. Also get latest free govt and other sarkari naukri job alerts daily through E-mail.