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General Knowledge :

Science




1.
Brass gets discoloured in air because of the presence of which of the following gases in air?

oxygen
hydrogen sulphide
nitrogen
carbon




2.
Which of the following is a non metal that remains liquid at room temperature?

helium
bromine
hydrogen




3.
Chlorophyll is a naturally occurring chelate compound in which central metal is

copper
magnesium
iron
calcium




4.
Which of the following is used in pencils?

graphite
silicon
charcoal
phosphrous




5.
Which of the following metals forms an amalgam with other metals?

tin
mercury
lead
zinc




6.
Chemical formula for water is

h2o
O2
Al2




7.
The gas usually filled in the electric bulb is

nitrogen
hydrogen
oxygen
carbon dioxide




8.
Which of the gas is not known as green house gas?

oxygen
nitrogen
carbon
hygrogen




9.
Bromine is a

black solid
red liquid
colourless gas




10.
   The hardest substance available on earth is

gold
silver
diamond
platinum




11.
Which of the following is used as a lubricant?

graphite
silica
iron 
diamond




12.
The average salinity of sea water is

3%
3.5%
4%
4.5%




13.
Galvanised iron sheets have a coating of

zinc
tin
lead




14.
Which of the following was to be discovered first in the chromospheres of the sun?

krypton
neon
helium




15.
Sodium metal is kept under

kerosene
petrol
water










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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.