General knowledge Questions on Chemistry

 

1. The nucleus of an atom consists of

Electrons and neutrons

Electrons and protons

Protons and neutrons

All of the above

 

2. The number of moles of solute present in 1 kg of a solvent is called its

Molality

Morality

Normality

Formality

 

3. The metallurgical process in which a metal is obtained in a fused state is called

Smelting

Roasting

Calcinations

Froth floatation

 

4. The molecules of which gas have the highest speed?

H2 at -73oC

CH4 at 300 K

N2 at 1,027oC

O2 at 0oC

 

5. The oldest rocks in the earth’s crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock’s called

Granite

Basalt

Igneous rocks

Sedimentary rocks

 

6. The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is

Dalton’s law

Gay Lussac’s law

Henry’s law

Raoult’s law

7. The gas present in the stratosphere which filters out some of the sun’s ultraviolet light and provides an effective shield against radiation damage to living things is

Helium

Ozone

Oxygen

Methane

 

8. The most commonly used bleaching agent is

Alcohol

Carbon dioxide

Chlorine

 

9. The main buffer system of human blood is

H2CO3 – HCO3

H2CO3 – CO32-

CH3COOH – CH3COO-

NH2CONH2 – NH2CONH+

 

10. The metal used to recover copper from a solution of copper sulphate is

Na

Ag

Hg

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