NTPC CBT-2 Chemistry Quiz - 38

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Question 1:

Elements which is not present in urea is

Carbon

Hydrogen

Nitrogen

Chlorine

Which of the following is non biodegradable ?

Benzene hexachloride (BHC)

Detergents

Both 1 and 2

None of these

What happen when sewage is disposed in water bodies ?

DO increases

BOD increases

DO remain same

BOD remain same

Which oxides are used as drier in paints?

1,2,3

1,3

2,4

2,3,4

The quality of diesel is checked by

Octane number

Cetane number

Tetraethyl lead compound

Atomic number