Everyday science MCQ

Monazite is an ore of

Water is a compound because

The element Nickel is

Graphite and  sillimanite are


When an iron nail gets rusted iron oxide is formed


Water is a good solvent of ionic salt because




The hardest substance available on Earth is


Actinides are the elements with atomic numbers from

Which is the best conductor of electricity

The ratio of pure gold in 18 carat gold is

The highest grade of coal whose surface is shining and has the highest calorific value

Element found on the surface of the moon is

The average salinity of seawater is

Which is the most stable element

Diamond is harder than graphite because of

A superconductor is characterised by

Of the various forms of carbon the one which is used for absorption purpose is

An element that does not occur in nature but can be produced artificially is

The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is

Heavy water is

Amalgams are

Which elements obtained from sea weeds

The metallic constituents of hard water are

The property of a substance to absorb moisture from the air on exposure is called

Which gas is used for preparation of soda water

Which of the following minerals has the lowest numerical hardness value


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

Quartz crystals normally used in Quartz clocks is chemically

Bell metal is an alloy of

The high temperature superconductors are

Which is the ingredient of gunmetal

The variety of coal in which the deposit contains recognisable traces of the original plant material is

The gas that usually causes explosions in coal mines is

In Fireworks the green flame is produced because of

Which  ore does not contain iron

Element required for solar energy conversion is

What was to be discovered first in the chromosphere of the Sun