UNIZIK Chemistry 2014/2015 Day 1 Past Questions

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

One of these is a physical change

A.bubbling of chlorine into water
B.bubbling of chlorine into jar containing hydrogen
C.the dissolution of sodium chloride in water
D.the passing of steam into heated iron
E.none of the above

The bond in ammonium chloride molecule is

A.ionic only
B.covalent only
C.ionic and dative covalent
D.dative covalent only
E.none of the above

The kinetic theory of gases does not explain one of these laws

A.Boyle's
B.Charles
C.Gay-Lussac
D.Graham's
E.A & C

How many moles of (H⁺) are there in 1dm³ of 0.5M solution, of H₂SO₄?

A.2.0moles
B.1.0mole
C.0.5 mole
D.0.25 mole
E.0.124 mole

Duralumin is made up of the following

A.zinc and gold
B.nickel and silver
C.manganese and mangneslum
D.aluminium and copper

A balanced chemical equation obeys the law of

A.conservation of mass
B.definite proportions
C.multiple proportions
D.conservation of energy
E.single proportion

If a gas occupies a volume of 1.50dm³ at 25°C and 1 atm at 100°C, what will it occupy?

A.1.88dm³
B.6.0104³
C.18.80dm³
D.60.00dm³
E.600dm³

To double both volume and pressure, to what temperature must a gas at 273K be heated?

A.298K
B.546K
C.819K
D.1092K
E.1000K

The relative molecular mass of a gas is 2Y. What is Y

A.the mass of the gas
B.the vapour density
C.the volume of the gas
D.the temperature of the gas
E.half of the mass of the gas

Which of these is common to the alloys Bronze and Brass?

A.Tin
B.Zinc
C.Copper
D.Lead
E.Aluminium