10 questions
Chlorine
Bromine
Fluorine
None
The purest form of iron is
Wrought iron
steel
pig iron
nickel iron
Hydrogen bomb is based on the principle of ......
Nuclear fission
Nuclear fusion
Radioactivity
All
Which one of the following is not a mixture ?
air
milk
mercury
cement
The shape of s-orbital is..............
dumbell
spherical
flat
double dumbell
Which one of the following does not contain silver ?
horn silver
german silver
ruby silver
none
Which is called as stranger gas ?
Argon
Neon
Xenon
Nitrous oxide
Rubies and Sapphires chemically known as
Silicon dioxide
Aluminium oxide
Lead tetra oxide
Boron nitride
Which is known as artificial silk ?
cotton
rayon
terylene
nylon
which acid is present in lemon ?
tartaric acid
lactic acid
lactic acid
citric acid