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Chemistry

Chemistry
The iron ore which contains 72% of iron is :

Limonite
Haematite
Siderite
Magnetite

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Chemistry
Which of the following is the best fuel in terms of energy released per gram of fuel?

Ethanol
Methane
Butane
Hydrogen

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Chemistry
Match the sourc in Column B with the product of Column A. (Product) Column B (Source)A. Formic acid1. LemonB. Citric acid 2. TamarindC. Tartaric acid3. Ants

A B C3 2 1
A B C 3 1 2
A B C 2 3 1
A B C 2 1 3

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Chemistry
Which among the following is found in chlorophyll ?

Fe2+
A l3+
Ca2+
Mg2+

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Chemistry
The National Chemical Laboratory is situated in

Bangalore
Pune
Patna
New Delhi

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Chemistry
The percentage of oxygen in air is approximately

0.78
0.01
1
0.21

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MORE MCQ ON Chemistry

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