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Chemistry

Chemistry
Hardest allotrope of carbon is

Graphite
Diamond
Lamp black
Coke

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Chemistry
Denatured spirit is ethanol mixed with

Petrol
Pyridine
Kerosene
Water

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Chemistry
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

5x
7.2 x
5x/36
x/6

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Chemistry
Which one of the following does not contain Silver ?

Ruby Silver
Horn Silver
Lunar Caustic
German Silver

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Chemistry
Sour taste of lemon is due to the presence of which of the following ?

Formic acid
Oxalic acid
Citric acid
Acetic acid

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Chemistry
Tetra ethyle lead (TEL) is

An antioxidant
An antiknock compound
A reductant
A catalyst in burning fossil fuel

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MORE MCQ ON Chemistry

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