Acids, bases and salts - Jamb Chemistry Past Questions and Answers

Question 176:

• JAMB 2018

An aqueous solution of a metal salt, M. gives a white precipitate with NaOH which dissolves in excess NaOH. With aqueous ammonia, the solution of M also gives a white precipitate which dissolves in excess ammonia Therefore the cation in M is

A. Zn
B. Ca
C. Al
D. Po

Question 177:

• JAMB 2018

(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

Question 178:

• JAMB 2018

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\(_3\)

Question 179:

• JAMB 2018

In the reaction between sodium hydroxide and sulphuric acid solutions, what volume of 0.5 molar sodium hydroxide would exactly neutralise 10cm3 of 1.25 molar sulphuric acid?

A. 5cm\(^3\)
B. 10cm\(^3\)
C. 20cm\(^3\)
D. 50cm\(^3\)

Question 180:

• JAMB 2018

To what volume must 300cm\(^3\) of 0.60M sodium hydroxide solution be diluted to give a 0.40M solution?

A. 450cm\(^3\)
B. 300cm\(^3\)
C. 200cm\(^3\)
D. 150cm\(^3\)