Answer / vijay

Air is mainly Nitrogen which is having molecular wt. 28.
Ammonia only has M.W. less than this (17). So this one is
lighter than air

Answer / guest

(3) Ammonia

Answer / sanjeev

chlorine

Answer / francis ekop

Co2 is lighter than air because it's has de less molecules in the atmosphere

Answer / dipankar mitra

chlorine

tea will coll most easily in a:

2 Answers  

Which of the following is used as a lubricant? 1 Graphite 2 Silica 3 Diamond 4 Iron oxide

3 Answers   Honda,

neel armstrong belongs to which country ?

1 Answers  

Which of the following was to be discovered first in the chromo sphere of the sun? 1 Xenon 2 Helium 3 Neon 4 Krypton

1 Answers  

Which of the following is a chemical change? 1 Rusting of iron 2 Tempering of iron 3 Melting of iron 4 Bending of iron

1 Answers  

What is the Embrylogy ?

2 Answers  

Why sun seems to be a red colour while sun-rising and sun- setting?

1 Answers  

The Purest form of water can be obtained from:- I) a deep tube well II) a running stream III) a hot water spring IV) a heavy shower of rain

0 Answers  

Old-written material, which cannot be read easily, can be read by 1 Cosmic rays 2 Ultraviolet rays 3 Infra red rays 4 None of these

1 Answers   ACIO, RRB,

What is blood ? Describe its functions in the human body ?

8 Answers  

‘No two electrons in an atom can have the same set of four quantum numbers’ is 1 Bohr’s law 2 Aufbau principle 3 Newton’s law 4 Pauli’s exclusion principle

1 Answers   Pipe Corporation,

Carbon, diamond and graphite are together called 1 Isomers 2 Allotropes 3 Isomorphs 4 Isotopes

3 Answers   Sri Chaitanya,