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Chemistry

Chemistry
Which of the following is the maximum number of electrons that can be present in M-shell?

18
32
8
2

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Chemistry
Among the fuels given below, the one with highest calorific value is

Wood
Natural gas
Coke
Coal

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Chemistry
Which of the following vitamins is generally excreted by human in urine?

Vitamin D
Vitamin C
Vitamin B
None of these

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Chemistry
Which of the following is a natural polymer?

Starch
Nylon
Bakelite
Polythene

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Chemistry
Among the following, carbonate ore of Zinc is

Sphalerite
Zincblende
Calamine
Zincite

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Chemistry
Which gas emitted by power stations causes acid rain?

Nitrogen
Carbon dioxide
Sulphur dioxide
Helium

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