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Chemistry

Chemistry
Which of the following is not present in RNA

Phosphate
Thymine
Uracil
Ribose

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Chemistry
Ultra purification of a metal is done by :

Smelting
Zone melting
Leaching
Slugging

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Chemistry
Ozone layer is present in

Troposphere
Stratosphere
Exosphere
Ionosphere

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Chemistry
Which of the following elements is obtained from sea weeds ?

Sulphur
Iodine
Argon
Vanadium

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Chemistry
Which of the following is used to remove ink and rust stains on cloth?

Ether
Kerosene oil
Oxalic acid
Alcohol

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Chemistry
The oxidation number of nickel in K4[Ni(CN)4] is

Zero
–4
8
4

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