UNIZIK Chemistry 2017/2018 Day 1 Past Questions

Practice each question, then open it to see the full details.

N₂O_4(g) → 2NO₂
In thc endothermic reaction above, more product formation will be favoured by

A.A constant volume
B.An increase in pressure
C.A decrease in pressure
D.A decrease in volume.

The mass of silver deposited when a current of 10A is passed through a solution of silver salt for 4830s is

A.108.0g
B.54.0g
C.27.0g
D.13.5g

Pollution of underground water by metal ions is very likely in a soil that has high

A.acidity
B.alkalinity
C.chloride content
D.nitrate content.

Which of the followthg ions is acidic?

A.K⁺
B.NO₃^-
C.S^2-
D.H₃O⁺

Chlorine consisting of two isotopes of mass numbers 35 and 37 in the ratio 3:1 and has an atomic mass 35.5. Calculate the relative abundance of the isotope of mass number 37.

A.20
B.25
C.60
D.75

The least easily oxidized of the metals below is

A.Ca
B.Na
C.Zn
D.Al

In which of the following are water molecules in the most disorderly arrangement?

A.Ice at -10°C
B.Ice at 0°C
C.Water at 100°C
D.Steam at 100°C

Which of the following will have its mass increased when heated in air?

A.Helium.
B.Magnesium
C.Copper pyrites
D.Glass

Calculate the number of moles of present in 20cm of a 0.75M solution of the acid

A.0.015mole
B.0.038mole
C.3.800moles
D.1.500moles