Chemistry MCQS for Class 10 Chapter 8

The number of carbon atoms present in petroleum ether.

5-Jan

5-Feb

7-May

7-Mar

Composition of carbon in the diesel oil.

C₁₅-C₁₈

C₁₃-C₁₅

C₁₀-C₁₂

C₇-C₁₀

When NaHCO₃ is heated if forms:

Ca(OH)₂

CaO

CaCO₃

CO₂

When crude oil is heated in the fractionating tower:

Vapours of lower boiling point fraction condense first in the lower part of tower.

Vapour of higher boiling point condense lather in the upper part of tower.

Vapour of higher boiling point fraction condense first in the lower part of the tower.

Vapours of higher boiling point never condense.

Chalco-pyite is an ore of:

aluminium

silver

copper

iron

How many units are in Pakistan for manufacturing of Urea.

12

6

3

9

Which one of the following is used as jet fuel.

Lubricating oil

Diesel oil

Fuel oil

Kerosene oil

Brown hair contains.

titanium compound

Copper compound

Both a and b

Iron compound

Ammonia is prepared by:

Solvay’s process

Haber’s process

Bayer’s process

Floatation process

Sindh alkalies limited was established near Karachi in.

1965

2000

1970

1966