A metal that can be extracted from cassitertite is

• A. cacium
• B. magnesium
• C. tin
• D. copper

Which of the following metals is passive to concentrated trioxonitrate (V) acid?

• A. Iron
• B. Tin
• C. Copper
• D. Zinc

Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) From the equation above, the mass of magnesium required to react with 250cm3 of 0.5M HCl is [Mg = 24]

• A. 0.3g
• B. 1.5g
• C. 2.4g
• D. 3.0g

2-methylprop-1-ene is an isomer of

• A. but-2-ene
• B. pent-1-ene
• C. 2-methylbut-2-ene
• D. 2-methylbut-1-ene

56.00cm³ of a gas at S.T.P. weighed 0.11g. What is the vapour density of the gas? [Molar volume of a gas at S.T.P = 22.4dm³]

• A. 11.00
• B. 22.00
• C. 33.00
• D. 44.00

POlyvinyl chloride is used to produce

• A. bread
• B. pencils
• C. ink
• D. pipes

Chlorine, bromine and iodine resemble one another in that they

• A. dissolve in alkalis
• B. react violently with hydorgen without heating
• C. are liquids
• D. displace one another from solutiions of their salts

Given that electronegativity increases across a period and decreases down a group in the periodic table, in which of the following compounds will the molecules be held together by the strongest hydrogen bond?

• A. HF^(g)
• B. NH3^(g)
• C. CH4^(g)
• D. HCl^(g)

When excess ethanol is heated to 145oC in the presence of concentrated H2SO4, the product is

• A. ethyne
• B. diethyl sulphate
• C. diethyl ether
• D. acetone

What quantity of electricity will liberate 0.125 mole of oxygen molecules during the electrolysis of dilute sodium chloride solution? [ F = 96 5000 C mol-1 ]

• A. 24 125 coulombs
• B. 48 250 coulombs
• C. 72 375 coulombs
• D. 96 500 coulombs