UNIZIK Chemistry 2018/2019 - Model 1 Past Questions

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

The element with electron configuration 1s²2s²2p⁶3s²3p¹ belongs to

A.s-block, period 3, group 1
B.p-block, period 3, group 2
C.s-block, period 3, group 3
D.p-block, period 3, group 3

Consider the following reaction equation: $${C_2H_{4(g)} + 3O_2{(g)} \rarr 2CO_{2(g)} + 2H_{2(g)}}$$. The volume of C)₂_(aq) produced at s.t.p. when 0.05 moles of ${C_2H_4_{(g)}}$ was burnt in O₂ is [Molar volume of gas at s.t.p. = 22.4dm³]

A.1.12dm³
B.2.24dm³
C.3.72dm³
D.4.48dm³

Which of the following substances when boiled with aqueous solution of sodium hydroxide would be hydrolysed? I. Protein II. Fat III. Polythene

A.I
B.II
C.I and II
D.II and III

C(s) + H₂O(g) --> H₂(g) + CO(g). ΔG for the reaction above at 1300K is -43kJ. At this temperature, the reaction is

A.not feasible
B.at equilibrium
C.feasible
D.exothermic

The major source of oxides of nitrogen is from the burning of

A.coal
B.wood
C.fuel
D.chlorofluorocarbons

The vapour pressure of a liquid depends on I. temperature II. rate of condensation; III. cohesive force holding the particles together.

A.I
B.I and II
C.I and III
D.II and III

When a reaction is endothermic

A.enthalpy change, H is negative
B.heat contnt of product is less than the heat content of reactant
C.heat content of reactants is less than the heat content of product
D.the reaction is non-spontaneous

Atomic orbital is

A.the circular path through which electrons revolve round the nucleus
B.a region around the nucleus where electrons are most likely to be found
C.the path around the nucleus through which protons move
D.a region around the nucleus where protons are most likely to be found

Which of the following oxides is ionic?

A.P₄O₁₀
B.MgO
C.Al₂O₃
D.SO₂

A cracking process in petroleum refining can be represented by

A.heptane to heptene
B.heptane to 3-methylhexame
C.heptane to propene and butane
D.heptane to 2,3,3-trimethybutane