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Chemistry

Chemistry
The most abundant element in the human body is

Oxygen
Nitrogen
Carbon
Iron

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Chemistry
Two electrons in an orbital are differentiated by which of the following ?

Spin quantum number
Magnetic quantum number
Azimuthal quantum number
Principal quantum number

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Chemistry
Main pollutants released from iron and steel industry are

NO, SO3 and H2S
CO2, H2S and NO2
CO2, NO2 and SO3
CO, CO2 and SO2

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Chemistry
Which of the following is not a derivative of barbituric acid

Equanil
Amytal
Veronal
Nembutal

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Chemistry
Which of the following is used to iodise common salt ?

Iodine
Potassium iodate
Potassium iodide
Sodium iodide

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Chemistry
The value of gas constant R in Ergs deg–1 mole–1 is

8.341 × 107
8.413 × 107
4.183 × 107
8.314 × 107

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