Jamb Chemistry Past Questions For Year 1995

Question 6

Two cylinders A and B each contains 30 cm³ of

oxygen and nitrogen respectively at the same temperature and pressure. If there are 5.0 moles of nitrogen, then the mass of oxygen is?

jamb 1995

• A. 3.2 g
• B. 6.4 g
• C. 80.0 g
• D. 160.0 g

Question 7

A gas sample with an initial volume of 3.25 dm³ is heated and allowed to expand to 9.75 dm³ at constant pressure. What is the ratio of the final absolute temperature to the initial absolute temperature?

jamb 1995

• A. 3:1
• B. 5:2
• C. 5:4
• D. 8:3

Question 8

What volume of oxygen will remain after reacting 8cm³ of hydrogen with 20cm³ of oxygen?

jamb 1995

• A. 10 cm³
• B. 12 cm³
• C. 14 cm³
• D. 16 cm³

Question 9

Deliquescent substances are also?

jamb 1995

• A. efflorescent
• B. anhydrous
• C. hygroscopic
• D. insoluble

Question 10

Helium is often used in observation balloons because it is?

jamb 1995

• A. light and combustible
• B. light and non-combustible
• C. heavy and combustible
• D. heavy and non-combustible