Question Library — KalmiPrep by Kalmitech

Chemistry UTME / JAMB 1983 Organic Chemistry II: Functional Groups, Polymers & Biomolecules

The alkanol obtained from the production of soap is

A

ethanol

B

glycerol

C

methanol

D

propanol

E

glycol

medium Difficulty

Chemistry UTME / JAMB 1983 Organic Chemistry I: Hydrocarbons & Crude Oil

The flame used by welders in cutting metals is

A

butane gas flame

B

acetylene flame

C

kerosene flame

D

oxy-acetylene flame

E

oxygen flame

medium Difficulty

Chemistry UTME / JAMB 1983 Organic Chemistry I: Hydrocarbons & Crude Oil

Consecutive members of an alkane homologous serires differ by

A

CH

B

CH2

C

CH3

D

CnHn

E

CnH

medium Difficulty

Chemistry UTME / JAMB 1983 Atomic Structure, Orbitals & Nuclear Chemistry

If an element has the electronic configuration 1s 2 2s2 2p3 3s2 3p4, it is

A

a metal

B

an alkaline earth metal

C

an s-block element

D

a p-Block element

E

a transition element

medium Difficulty

Chemistry UTME / JAMB 1983 Nature of Matter & Separation Techniques

Some copper (ll) sulphate pentahydrate (CuSO4 5H2O), was heated at 120 oC with the following results. Wt of crucible = 10.00 g; Wt of crucible + CuSO4 5H2O =14.98g; Wt of crucible + residue = 13.54 g. How many molecules of water of crystalization were lost? [H = 1, Cu = 63.5, O = 16, S = 32]

A

1

B

2

C

3

D

4

E

5

medium Difficulty

Chemistry UTME / JAMB 1983 Organic Chemistry I: Hydrocarbons & Crude Oil

The three-dimensional shape of methane is

A

hexagonal

B

trigonal

C

linear

D

tetrahedral

E

cubical

medium Difficulty

Chemistry UTME / JAMB 1983 Organic Chemistry II: Functional Groups, Polymers & Biomolecules

An unknown organic compound X has a relative molecular mass of 180. It is a colourless crystaline solid, readily soluble in water. X contains the elements C, H and O in the atomic ratio 1: 2:1. The compound has a sweet teste and melts on heating. In the presence of yeast and in the absence of air, X is converted to compound Y and a colourless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a 'pop' sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet smelling compound W. Compound W is

A

a soap

B

an oil

C

an alkane

D

an ester

E

sucrose

medium Difficulty

Chemistry UTME / JAMB 1983 Stoichiometry, Mole Concept & Volumetric Analysis

An unknown organic compound X has a relative molecular mass of 180. It is a colourless crystaline solid, readily soluble in water. X contains the elements C, H and O in the atomic ratio 1: 2:1. The compound has a sweet teste and melts on heating. In the presence of yeast and in the absence of air, X is converted to compound Y and a colourless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a 'pop' sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet smelling compound W. The molecular formula of X is

A

C12H22O11

B

C6H12O6

C

C3H6O 3

D

C7H14O7

E

C12H6O4

medium Difficulty

Chemistry UTME / JAMB 1983 Organic Chemistry II: Functional Groups, Polymers & Biomolecules

An unknown organic compound X has a relative molecular mass of 180. It is a colourless crystaline solid, readily soluble in water. X contains the elements C, H and O in the atomic ratio 1: 2:1. The compound has a sweet teste and melts on heating. In the presence of yeast and in the absence of air, X is converted to compound Y and a colourless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a 'pop' sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet smelling compound W. Reaction of X with yeast forms the basis of the

A

plastic industry

B

textile industry

C

brewing industry

D

soap industry

E

dyeing industry

medium Difficulty

Chemistry UTME / JAMB 1983 Nature of Matter & Separation Techniques

A mixture of common salt, ammonium chloride and barium sulphate can best be separated by

A

addition of water followed by filtration then sublimation

B

addition of water followed by sublimation then filtration

C

sublimation followed by addition of water then filtration

D

fractional distillation

E

fractional crystallization

medium Difficulty

Chemistry UTME / JAMB 1983 Kinetic Theory of Matter & Gas Laws

Which of the following relationships between the pressure P, the volume V and the temperature T, represents an ideal gas behaviour?

A

P \(\alpha\) VT

B

P \(\alpha\) T/V

C

PT \(\alpha\) V

D

PV \(\alpha\) I/T

E

P \(\alpha\) V/T

medium Difficulty

Chemistry UTME / JAMB 1983 Metals, Transition Elements & Extraction

The colour imparted to a flame by calcuium ion is

A

green

B

blue

C

brick-red

D

yellow

E

lilac

medium Difficulty

Chemistry UTME / JAMB 1983 Stoichiometry, Mole Concept & Volumetric Analysis

In the reaction M + N P;∆H = + QKJ. Which of the following would increase the concentration of the product?

A

Decreaseing the concentration of N

B

Increasing the concentration of P

C

Adding a suitable catalyst

D

Decreasing the temperature

E

Increasing the temperature

medium Difficulty

Chemistry UTME / JAMB 1983 Stoichiometry, Mole Concept & Volumetric Analysis

In which of the following processes is iron being oxidized? 1 Fe + H2SO4 → FeSO4 +H2 2 FeSO4 + H2S → FeS + H2SO4 3 2FeCI2 + Cl2 → 2FeCl3 4 2FeCl3 + SnCl2 + → 2FeCl2 + SnCl4

A

1 only

B

2 only

C

3 only

D

1 and 3

E

2 and 4

medium Difficulty

Chemistry UTME / JAMB 1983 Electrolysis & Electrochemical Cells

In the reaction Fe + Cu2+ \(\to\) Fe2+ + Cu,iron displaces copper ions to from copper. This is due to the fact that

A

irn is in the metallic from while the copper is in the ionic from

B

the atomic weight of copper is greater than that of iron

C

copper is greater than iron

D

copper metal has more electrons than iron metal

E

iron is higher in the electrochemical series than copper

medium Difficulty