Jamb 2015

Question 1

The filter in the cigarette reduce the nicotine construct by

Answer 1

Absorption

Question 2

Which of these require crystallization most?
A. Drug making
B. Cement making
C. Paint making
D. Perfume making

Answer 2

A

Question 3

In the industrial production of H2 from water gas the CO2 produced along with the H2 is removed by

Answer 3

Washing under pressure

Question 4

Vulcanization involve the removal of

Answer 4

Double bond

Question 5

The acid in electrolysis of water is dilute

Answer 5

H2SO4

Question 6

A suitable reagent to distinguish between alcohol and carboxylic acid is

Answer 6

NaHCO3

Question 7

Which of the following metals burns with brick red
A. Pb
B. Ca
C. Na
D. Mg

Answer 7

B

Calcium is the only metal that burn with brick red flame. Option A,C,D will not burn with brick red flame rather burn with brick blue flame

Question 8

In the production of soap, concentrated sodium chloride solution is added to

Answer 8

Decrease the solubility of the soap

Question 9

Tartaric acid is used industrially to

Answer 9

Making baking powder

Question 10

Which of the following ions requires the largest quantity of electricity for discharge at an electrode?

A. 2.0 mole of Q3+
B. 2.5 mole of R2+
C. 3.0 mole of T-
D. 4.0 mole of Y-

Answer 10

A

Question 11

Hydrogen can be displaced from a hot alkaline solution by

Answer 11

Sn

Question 12

A major source of oxide of nitrogen is from the burning of

Answer 12

Fuel

Question 13

Which radioactive elements is commonly used as a nuclear fuel

Answer 13

Uranium

Question 14

The energy value of petrol can be determined by

Answer 14

Fractionating column

Question 15

NH3(g) + HCl(s) → NH 4Cl (s)

The entropy change in the system above is

Answer 15

Negative

Question 16

Detergents are manufactured with straight hydrocarbon chains, is to make them

Answer 16

Biodegradable

Question 17

Which of the following gives a precipitation when treated with NaOH Solution?
A. AlCl3
B. NH4Cl
C. Na2CO3
D. CH3COONa

Answer 17

A

Question 18

What is used to remove impurities from pig iron

Answer 18

Oxygen

Question 19

If glucose is heated with concentrated tetraoxosulphate(vi)acid, it will be dehydrated to?

Answer 19

Carbon

Question 20

Chlorine gas turns damp starch-iodide paper

Answer 20

Dark blue

Question 21

In the electrolysis of brine the anode and cathode is

Answer 21

Carbon and mercury

Question 22

When steam is passed over red hot carbon the substances produced are

Answer 22

H2 and CO