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Chemistry

Chemistry
The hottest part of the gas flame is known as

blue zone
luminous zone
non-luminous zone
dark zone

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Chemistry
Diamond is lustrous because

Its refractive index is high
It is colourless
It is hard
It is pure

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Chemistry
The most abundant element by number in the living system is :

Hydrogen
Oxygen
Carbon
Nitrogen

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Chemistry
A subshell with l=2 can take up

8 electron
3 electron
10 electron
5 electron

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Chemistry
Vinegar is ________ .

Glacial formic acid
Diluted acetic acid
Diluted formic acid
Glacial acetic acid

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Chemistry
Slag is a name given for

Molten calcium silicate
Molten alumina
Molten iron
Molten sand

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