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Chemistry

Chemistry
Chemical name of vinegar is

Formaldehyde
Acetic acid
Ethanol
Acetone

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Chemistry
Which of the following is used to increase the anti-knocking property of petrol ?

Tetraethyl lead
Trimethyl lead
Tetramethyl lead
Triethyl lead

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Chemistry
Forth floatation process to concentrate the minerals is applicable to

Chalcopyrites
Calamine
Haematite
Bauxite

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Chemistry
The most abundant constituent of atmospheric air is :

Nitrogen
Carbon
Oxygen
Hydrogen

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Chemistry
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is

2.05 gram
4.05 gram
5.05 gram
3.05 gram

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Chemistry
Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives

Copper at cathode and oxygen at anode
Hydrogen at cathode and oxygen at anode
Copper at cathode and anodes dissolve to give copper
Copper at anode and oxygen at cathode.

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