FUTO Chemistry 2011/2012 Day 3 Past Questions

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

Which of the following substances is not a homogenous mixture?

A.filtered sea water
B.soft drink
C.flood water
D.writing ink

There is a large temperature interval between the melting point and the boiling of a metal because

A.metals have very high melting points
B.metals conduct heat very rapidly
C.melting does not break the metallic bond but boiling does
D.the crystal lattice of metals is easily broken

How many moles of (H⁺) are there in 1dm³ of 0.5M solution of H₂SO₄

A.2.0 moles
B.1.0 moles
C.0.5 moles
D.0.25 moles

A given mass of gas occupies 2dm³ at 300K. At what temperature will its volume be doubled, keeping the pressure constant

A.400K
B.480K
C.550K
D.600K

If 100cm³ of oxygen pass through a porous plug in 50 seconds, the time taken for the same volume of hydrogen to pass through the same porous plug is

A.10.0s
B.12.5s
C.17.7s
D.32.0s

Which of the following is a measure of the average kinetic energy of the molecules of a substance?

A.volume
B.mass
C.pressure
D.temperature

How many lone pairs of electrons are there on the central atom of the molecule?

A.1
B.2
C.3
D.4

Four element P,Q,R, and S an have 1, 2, 3 and 7 electrons in their outermost shell respectively. The element which is likely to be a metal is

A.P
B.R
C.Q
D.S

Which of the following gases dissolves in water vapour to produce acid rain during rainfall?

A.oxygen
B.carbon (II) oxide
C.nitrogen
D.sulphur (IV) oxide

Water for town supply is chlorinated to make it free from

A.bad odour
B.bacteria
C.temporary hardness
D.permanent hardness