JAMB Chemistry Past Questions & Answers - Page 68

336.

The salt that reacts with dilute hydrochloric acid to produce a pungent smelling gas which decolourizes acidified purple potassium tetraoxomanganate (VII) solution is

A.

Na\(_2\)SO\(_4\)

B.

Na\(_2\)SO\(_3\)

C.

Na\(_2\)S

D.

Na\(_2\)CO\(_3\)

Correct answer is B

No explanation has been provided for this answer.

337.

(I). 3CuO(s) + 2NH3(g) -----> 3Cu(s) + 3H2O(l) + N2(g) 
(II). 2NH3(g) + 3Cl2(g) -----> 6HCl(g) + N2(g) 
(III). 4NH3(g) + 3O2(g) -----> 6H2O(l) + N2(g) 
The reactions represented by the equations above demonstrate the

A.

basic properties of ammonia

B.

acidic properties of ammonia

C.

reducing properties of ammonia

D.

oxidizing properties of ammonia

Correct answer is C

No explanation has been provided for this answer.

338.

mE + nF -----> pG + qH 
In the equation shown, the equilibrium constant is given by?

A.

\(\frac{[E]^m[F]}{[G]^p[H]^q}\)

B.

\(\frac{[E][F]}{[G][H]}\)

C.

\(\frac{[G]^p[H]^q}{[E]^m[F]^n}\)

D.

\(\frac{[G][H]}{[E][F]}\)

Correct answer is C

No explanation has been provided for this answer.

339.

Beryllium and Aluminium have similar properties because they

A.

are both metals

B.

belong to the same group

C.

belong to the same period

D.

are positioned diagonally to each other

Correct answer is A

No explanation has been provided for this answer.

340.

The radio isotope used in industrial radiography for the rapid checking of faults in welds and casting is?

A.

carbon-14

B.

phosphorus-32

C.

cobalt-60

D.

iodine-131

Correct answer is C

No explanation has been provided for this answer.