FUTO Chemistry 2011/2012 Day 1 Past Questions

Practice each question, then open it to see the full details.

A mixture contains 20cm³ of hydrogen, 35cm³ of oxygen, 15cm³ of carbon dioxide and 10cm³ of nitrogen at STP, which of the following gives the mole fraction of hydrogen in this mixture?

A.0.02
B.0.16
C.0.20
D.0.25
E.20

0.07g of a hydride of carbon occupies 56 at S.T.P when vapourised and contains 14.29% by mass of hydrogen. The formula of the hydrocarbon is

A.CH4
B.C₂H₂
C.C₂H₄
D.C₂H₆
E.C₄H₈

The pressure on 100cm² of oxygen gas at 35°C is 750mm of Hg. What would be the if the pressure is increased to 1000mm of Hg without changing the temperature?

A.133.3cm³
B.85cm³
C.75cm³
D.65cm³
E.58cm³

Which of the following bonds exist in crystalline ammonium chloride (NH₄Cl)?

A.ionic and covalent
B.ionic and co-ordinate
C.ionic, covalent and co-ordinate
D.covalent, co-ordinate and metallic
E.ionic, covalent and metallic

Which of the following is neutralization reaction? Addition of

A.nitric acid to hydrochloric acid
B.nitric acid to sulphuric acid
C.acid to distilled water
D.nitric acid to sodium hydroxide
E.sodium chloride to distilled water

In the preparation of carbon monoxide by heating ethanedoic acid with concentrated sulphuric acid, the conc. Sulphuric acid acts as

A.oxidizing agent
B.reducing agent
C.dehydrating agent
D.reaction medium
E.catalyst

How many grams of methyl acetylene (propyne) CH₃ - C = CH will completely discharge the colour of 8g of bromine? (Br=80, C = 12, H=1)

A.0.5
B.1.0
C.2.0
D.3.0
E.4.0

Brass is an alloy containing copper and

A.zinc
B.tin
C.aluminum
D.silver
E.lead

60cm³ of hydrogen are sparked with 20cm³ of oxygen at 100°C and 1 atmosphere. The total volume of the residual gases is

A.60cm³
B.10cm³
C.40cm³
D.30cm³
E.70cm³

If the diffusion of oxygen gas is taken as 1 what will be the rate of diffusion of methane whose relative molar mass is 16?

A.2.0
B.1.8
C.1.4
D.1.0
E.0.5