Chemistry MCQS with Answers Set 2

For most of the chemical reaction the rate of reaction

May increases or decreases during the reaction

Decreases as the reaction proceeds

Remains constant as the reaction

Increases as the reaction proceeds

Which is the most amphoteric?

MgO

CaO

AI₂O₃

Na₂O

Setting of plaster of paris involves

Combination with atmosphere CO₂

Hydration to yield another hydrate.

Oxidation with atmospheric oxygen

Dehydration

Wt. of 112 ml of oxygen at NTP on liquefaction would be

0.32 g

0.16 g

0.96 g

0.64 g

Propyne on hydrolysis in presence of H₂SO₄ and HgSO₄ gives

Acetaldehyde

None

Formaldehyde

Actone

Number of elements presents in the fifth period of periodic table is

8

10

32

18

Hybridization explain the——- of orbitals

Shapes

Type of Bonding

Shape and Type of bonding

None of above

The effect of increasing the pressure on the following equilibrium 2A + 3B | | 3A + 2B is

Backward reaction is favoured

None of the above

No effect

Forward reaction is favoured

Atmosphere of big/metropolitan cities is polluted most by

Radio-active fall out

Pesticide residue

Household waste

Automobile exhausts

The movement of solvent molecules through a semipermeable membrane is called

Osmosis

Cataphoresis

Electrophoresis

Electrolysis