1.
The substance responsible for green coat on articles made of Copper is
2.
The reaction in which a black coat forms on silver articles is
3.
Firing of crackers is an example of _______
4.
The brown coloured gas evolved on heating of Lead Nitrate is ______
5.
The gas used to preserve chips in packets is
6.
Stainless steel is an alloy of
7.
CuO + H₂ → Cu + H₂O. This is an example for
8.
Atomic number of Carbon is
9.
Identify a temporary change
10.
N₂ + O₂ → 2NO. This is an example for ________ reaction
11.
Formula for Propane is
12.
1 gram molar volume of any gas contains _________ no of molecules
13.
Which element is non - corrosive?
14.
Ca CO₃ → CaO + CO₂ is an example for
15.
_____ is added to oils to prevent Oxydation
16.
The chemical reaction involved in addition of yeast to wet paste of rice is
17.
The process of coating iron articles with Zinc is
18.
The substances which undergo chemical change are called
19.
Photosynthesis is an example for
20.
_____ vitamin is added to preserve food
