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Chemistry

Chemistry
The antiseptic compound present in dettol is

Cresol
Enloroxylenol
Biothional
Iodine

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Chemistry
The metallic constituents of hard water are :

Magnesium, tin and iron
Magnesium, calcium and tin
Iron, tin and calcium
Calcium, magnesium and iron

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Chemistry
Which one of the following metals does not react with water to produce Hydrogen ?

Potassium
Cadmium
Lithium
Sodium

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Chemistry
The chief constituent of natural gas is:

Methane
Propane
Nitrogen
Helium

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Chemistry
The percentage of carbon in cost iron is :

0.5 to 1.5
0.01 to 0.25
6 to 8
3 to 5

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

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

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