(a)(i) List two reactants for the laboratory preparation of ammonia

(ii) State three physical properties of ammonia

(iii) Describe in outline, the manufacture of ammonia by the Haber process.

(b) Write an equation in each case to show the:

(i) reaction between ammonia gas and heated copper (II) oxide

(ii) action of heat on ammonium trioxocarbonate (IV)

(c)(i) Which industrial process is used for convey ammonia to trioxonitrate (V) acid?

(ii) Give the reason why electropositive metals do not generally are off hydrogen with dilute trioxonitrate (V) acid

(d) Give one example in each case, to show how trioxonitrate (V) acid reacts generally with: (i) bases (ii) non-metals.

Hydrogenation of palm oil results in a solid compound called

• A) candle
• B) solid palm oil
• C) palm oil
• D) ester

What is the mass of solute in 500cm₃ of 0.005moldm^−3 H₂SO₄? ( H = 1, S = 32.0, O=16.0)

• A. 0.490g
• B. 0.049g
• C. 0.245g
• D. 0.0245g

H- + H2(I)O → H2(g) + OH-(aq). From the equation above, it can be inferred that the?

• A. reaction is a double decomposition
• B. hydride ion is a reducing agent
• C. hydride ion is an oxidizing agent
• D. reaction is neutralization

Consider the reaction represented by the following equation:AgNO³ + NaCl ? AgCl + NaNO³The steps that could be taken to obtain pure dry sample of AgCI (s) from the mixture includes

• A. heating to saturation and drying
• B. filtering and evaporation to dryness
• C. filtering, washing and drying
• D. crystallizing and allowing to cool

In the laboratory preparation of ammonia, the flask is placed in a slanting position so as to

• A) prevent condensed water from breaking the reaction flask
• B) enable the proper mixing of the reactions in the flask
• C) enhance the speed of the reaction
• D) prevent formation of precipitate

10.0 dm3 of air containing H2S as an impurity was passed through a solution of Pb(NO3)2 until all the H2S had reacted. The precipitate of PbS was found to weigh 5.02 g. According to the equation: Pb(NO3)2 + H2S → PbS + 2HNO3 the percentage by volume of hydrogen sulphide in the air is? (Pb = 207, S = 32, GMV at s.t.p = 22.4dm3)

• A. 50.2
• B. 47.0
• C. 4.70
• D. 0.47

Which of the following reactions would be expected to have the highest entropy change?

• A. Liquid to Gas
• B. Solid to Liquid
• C. Gas to Liquid
• D. Gas to Solid

Which of the following is not true of the elements represented by the symbols a X and why?

• A. X and Y have the same number of electrons
• B. X and Y have the same number of protons.
• C. X and Y are isotopes.
• D. X and Y represent atoms of different elements.

Which of the following statements about solids is correct?

• A. Solid particles are less orderly than those of a liquid
• B. Solid have lower densities than liquids
• C. Solid particles have greater kinetic energies than those of liquids
• D. Solid particles cannot be easily compressed