Chemistry and Industry - Jamb Chemistry Past Questions and Answers

Question 91:

• JAMB 1998

If an element X of an atomic number Z and mass number Y is irradiated by an intense concentration of neutrons, the relevant nuclear equation is?

A. ^y_zX + ¹₀n → ^{y - 1}_{z + 1}X
B. ^y_zX + ¹₀n → ^{y + 1}_zX
C. ^y_zX + ¹₀n → ^y_{z + 1}X
D. ^y_zX + ¹₀n → ^{y + 1}_{z - 1}X

Question 92:

• JAMB 1998

3CuO_(s) + 2NH_3(g) → 3Cu_(s) + 3H₂O_(I) N_2(g) (i).
2NH_3(g) + 3Cl_2(g) → 6HCl_(g) + N_2(g) (ii).
4NH_3(g) + 3O_2(g) → 6H₂O_(I) + 2N_2(g) (iii).
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 93:

• JAMB 1998

The oxide that remains unchanged when heated in hydrogen is?

A. CuO
B. Fe₂O₃
C. PbO₂
D. ZnO

Question 94:

• JAMB 1999

0.25 mole of hydrogen chloride was dissolved in distilled water and the volume made up of 0.50 dm³. If 15.0 cm³ of the solution requires 12.50 cm³ of aqueous sodium trioxocarbonate (IV) for neutralization, calculate the concentration of the alkaline solution

A. 0.30 mol dm³
B. 0.40 mol dm³
C. 0.50 mol dm³
D. 0.60 mol dm³

Question 95:

• JAMB 2000

The shapes of CO₂, H₂O and CH ₄ respectively are

A. Bent, linear and tetrahedral
B. Bent, tetrahedral and linear
C. Linear, bent and tetrahedral
D. Tetrahedral, linear and bent