What amount of hydrogen will be required for complete hydrogenation of one mole of pent-3-yne?

• A. 1 mole
• B. 2 moles
• C. 3 moles
• D. 5 moles

The major raw material used in a plastic industry is

• A. ethanol
• B. sulphur.
• C. methylethanoate
• D. ethene

The solubility of a salt of molar mass 101g at 20oC is 0.34 mol dm_-3. If 3.40g of the salt is dissolved completely in 250cm₃ of water in a beaker, the resulting solution is

• A. A suspension
• B. Saturated
• C. Unsaturated
• D. Supersaturated

How many unpaired electrons are present in \(_{26}Fe^{3+}\)?

• A. 4
• B. 2
• C. 3
• D. 5

Which of the following electronic structures belongs to a noble gas?

• A. 1s₂2s₂
• B. 1s₂2s₂2p₄
• C. 1s₂2s₂2p₆3s₂3p₆
• D. 1s₂2s₂2p₂

Calculate the amount in moles of silver deposited when 9650C of electricty is passed through a solution of silver salt [= 96500 C/mol]

• A) 0.05
• B) 10.80
• C) 10.00
• D) 0.10

Nuclear reactions can be used in the following except

• A. gauging the thickness of objects
• B. making atomic bombs
• C. curing cancer
• D. purifying water

The colour of the solution formed when ethyne reacts with an acidic solution of potassium tetraoxomanganate (VII) is

• A. purple
• B. colourless
• C. green
• D. pink

A solution containing chloride ions gives white precipitate with silver trioxonitrate(V) Solution. The precipitate will be insoluble in dilute?

• A. HNO₃ but soluble in ammonia solution
• B. HNO₃ and ammonia solution
• C. HCl but soluble in ammonia solution
• D. HCl and in ammonia solution

(a)(i) State two differences betwecii the properties of solids and gases

(ii) What process does each of X, Y and Z represent in the changes shown below?

(b)(i) State Charles' Law (ii) Draw a sketch to graphically illustrate Charles' Law.

(c) 60 cm of hydrogen diffused through a porous membrane in 10 minutes. The same volume of a gas G diffused through the same membrane in 37.4 minutes. Determine the relative molecular mass of G. [ H = I ]

(d)(i) State two assumptions X of the kinetic theory.

(ii) Consider the reaction represented by the Solid of Liquid following equation:

H\(_{2(g)}\) + Cl\(_{2(g)}\) \(\to\) 2HCI\(_{(g)}\)

Use the kinetic theory to explain how the rate of formation of HCI\(_{(g)}\) would be affected by I. increase in temperature; II. decrease in pressure.

(e) Given different examples, mention one metal in each case vihich produces hydrogen on reacting with (i) dilute mineral acid; (ii) cold water; (iii) steam; (iv) hot, concentrated alkali.