A jet plane carrying 3,000 kg of ethane burns off all the gas forming water and carbondioxide. if all the carbondioxide is expelled and all the water formed is condensed and kept on board the plane, then the gain in weight is

A. 1,800 kg

B. 900 kg

C. 600 kg

D. 2, 400 kg

E. 1, 200 kg

Liquid X, reacts with sodium trioxocarbonate (IV) (Na₂CO₃) to give a gas which turns calcium chloride solution milky X is

A. Na₂SO₄(aq)

B. Kl (aq)

C. an alkali

D. an acid

E. a hydrocarbon

Which of the following statements is FALSE?

A. Copper (ll) ion can be reduced to copper (l) ion by hydrochloric acid and zinc

B. Sodium metal dissolves in water giving oxygen

C. Nitrogen is insoluble in water

D. Carbondioxide is soluble in water

E. lead has a higher atomic weight than copper

When sodium dioxonitrate (lll) (NaNO₂) dissolves in water, ∆H is positive. The process of dissolution is

A. exothermic

B. endothermic

C. isothermal

D. isomeric

E. hygroscopic

The equilibrium reaction between copper (l) chloride and chlorine at 25^oC and 1 atmosphere is represented by the equation:
2CuCl +Cl₂ ⇌ 2 CuCl₂ ∆H = - 166 KJ. Which of the following statements is TRUE for the reaction, pressure remaining constant?

A. more CuCl is formed at 40^oC

B. more CuCl₂ is formed at 10^oC

C. Less CuCl₂ is formed at 10^oC

D. there is no change in the amount of CuCl₂ formed at 40^oC and10^oC

E. more CuCl is consumed at 40^oC

Zn + 2HCl → ZnCl₂ + H₂

The rate of the above reaction will be greatly increased if

A. the zinc is in the powered form

B. a greater volume of the acid is used

C. a smaller volume of the acid is used

D. the reaction vessel is immersed in an ice-bath

E. the zinc is in the form of pellets

Zn + H₂ SO₄ → ZnSO₄ + H₂

in the above reaction how much zinc will be left of 1.0 M of H₂SO?
[Zn =65, s = 32, O = 16, H = 1]

A. 1.35g

B. 1.00g

C. 0.70g

D. 0.65g

E. 0.00g

30 cm³ of 0.1 M Al (NO₃)₃ SOLUTION IS RECTED WITH 100cm³ of 0.15M of NaOH solution. Which reactant is in excess, and by now much ?

A. NaOH solution by 70 cm³

B. NaOH solution, by 60 cm³

C. NaOH solution by 40 cm³

D. Al(NO₃)₃ solution by 20 cm³

E. Al(NO₃)₃ solution by 10 cm³

In the above experiment, the litmus paper will initially

A. be bleached

B. turn green

C. turn red

D. turn blue

E. turn black

In the experiment above, a current was passed for 10 minutes and 0.63g of copper was found to be deposited on the cathode of CuSO₄ cells. The weight of silver deposited on the cathode og AgNO³ cell during the same period would be? [Cu = 63, Ag = 108]

A. 0.54g

B. 1.08g

C. 1.62g

D. 2.16g

E. 3.24g