Chemistry MCQS for Class 10 Chapter 8

10th Class Chemistry MCQS
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The process of roasting during metallurgy of copper is carried out in a special furnace called.
Fire furnace
Blast furnace
Reverberatory furnace
Bessemer converter

The number of carbon atoms present in kerosene oil.
12-Aug
12-Sep
12-Nov
12-Oct

The impurities associated with the minerals are known as:
Gangue
Compounds
Ores
Metallurgy

Crude oil is heated to the fractionating furnace upto.
450oC
400oC
350oC
300 oC

Formula of Urea is.
HN-CO2-NH
KCNO
H3N-CO-NH3
H2N-CO-NH2

A saturated solution of sodium chloride is called.
None of these
Colloidal
Brine
Suspension

The process of removal of gangue form the ore is technically known as:
metallurgy
refining
purification process
concentration

The nitrogen present in urea is used by plants to synthesize.
Sugar
Fats
DNA
Proteins

Red hair contains compound of.
Iron
copper
Molybdenum
titanium

Petroleum fraction having composition C5 to C7 is.
Petroleum Ether
Kerosine oil
Petroleum Gas
Gasoline or petrol

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