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Chemistry

Chemistry
Sour milk contains

Tartaric acid
Citric acid
Acetic acid
Lactic acid

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Chemistry
Name two elements that find wide application in transistor industry

Silicon and Germanium
Iridium and Germanium
Tungsten and Platinum
Carbon and Platinum

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Chemistry
The maximum number of covalent formed by nitrogen is

2
4
3
1

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Chemistry
The ionic radii of N3-, O2-, F- and Na+ follows the order

Na+ > O2- > N3- > F-
N3- > Na+ > O2- > F-
N3- > O2- > F- > Na+
O2- > F- > Na+ > N3-

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Chemistry
In vulcanisation process, rubber can be hardened by adding

Nitrogen
Alcohol
Silicon
Sulphur

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Chemistry
Stalactites and Stalagmites form due to the precipitation of :

CaCO3
CaCl2
MgCO3
MgCl2

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