Chemistry 2018 Jamb Past Questions and Answers

Question 36 :

• JAMB 2018

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

Question 37 :

• 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 38 :

• 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 39 :

• JAMB 2018

The refreshing and characteristic taste of soda water and other soft drinks is as a result of the presence of

A. Carbon(IV)oxide
B. Carbon(ll)oxide
C. Soda
D. Glucose

Question 40 :

• JAMB 2018

Which of the following are mixtures?
I. Petroleum
II. Rubber latex
III. Vulcanizer's solution
IV. Carbon sulphide

A. I, II and III
B. I, II and IV
C. I and II only
D. I and IV