Normal, Acidic, Basic, And Double Salts Jamb Chemistry Past Questions

Question 6

The conductivity of an acid solution depends on the

jamb 2018

• A. amount of ions present and their mobilities
• B. mobilities of the ions present
• C. amount of ions present
• D. temperature of the solution

Question 7

The combustion of carbon(ii)oxide in oxygen can be represented by equation.

2CO + O\(_2\) → 2CO\(_2\)

Calculate the volume of the resulting mixture at the end of the reaction if 50cm\(_3\) of carbon(ii)oxide was exploded in 100cm\(_3\) of oxygen

jamb 2019

• A. 75cm\(^3\)
• B. 125cm\(^3\)
• C. 100cm\(^3\)
• D. 50cm\(^3\)

Question 8

Na₂CO₃ + 2HCI → 2NaCI + H₂O + CO₂. Using the above equation, what volume of carbondioxide, measured at s.t.p is liberated when 53g of sodium carbonate is dissolved in hydrochloric acid?

(1 mole of gas occupies 22.4 dm³ at s.t.p)

(Na = 23, C = 12, O = 16)

jamb 1981

• A. 44.8 dm³
• B. 11.2 dm³
• C. 100.1 dm³
• D. 3.0 dm³
• E. 22.4 dm³

Question 9

Which of the following is an acidic salt?

jamb 1986

• A. NaHSO₄
• B. Na₂SO₄
• C. CH₃CO₂Na
• D. Na₂S