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Chemistry

Chemistry
An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is

19
36
53
17

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Chemistry
Calcium salts used as fertilizer is :

Calcium Carbide
Calcium Sulphate
Calcium Cyanide
Calcium Carbonate

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Chemistry
Ethanol containing 5% water is known as

Denatured spirit
Methylated alcohol
Power alcohol
Rectified spirit

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Chemistry
Adding Cl2 to benzene in the presence of AlCl3 is an example of :

Addition reaction
Substitution reaction
None of the options
Elimination reaction

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Chemistry
Magnetite is

2Fe2O3. 3H2O
Fe2O3
FeCO3
Fe3O4

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Chemistry
Which of the following type of coal has the lowest proportion of volatile matter ?

Lignite
Anthracite
Bituminous
Peat

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