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

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

The colour imparted to a flame by calcuium ion is

A. green

B. blue

C. brick-red

D. yellow

E. lilac

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

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

A. 1 only

B. 2 only

C. 3 only

D. 1 and 3

E. 2 and 4

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

C₂H₅ - C = CH₂
CH₃

The correct name of the compound with the above structural formula is

A. 2-methylbut -1-ene

B. 2-methylbut -2-ene

C. 2-methylbutane

D. 2-ethylprop-1 -ene

E. 2-ethylprop-2-ene

How many isomeric forms are there for the molecular formula C₃H₆Br₂?

A. 1

B. 2

C. 3

D. 4

E. 5

A piece of burning sulphur will continue to burn in a gas jar of oxygen to give misty fumes which readily dissolved in water. The resulting liquid is

A. sulphur (VI) trioxide

B. tetraoxosulphate (VI) acid

C. trioxosulphate (IV) acid

D. dioxosulphate (II) acid

E. hydrogen sulphide

Sodium sulphate decahydrate (Na₂SO₄.10 H₂O) on exposure to air loses all its water of crystallization.
The process of loss is known as

A. efflorescence

B. hygroscopy

C. deliquescence

D. effervescence

E. dehydration