(Paper) Chemistry Objective Type Questions with Answers for the preparation of Engineering Entrance Test : AIEEE, IIT-JEE, CET
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Chemistry Objective Type Questions with Answers for the preparation of
Engineering Entrance Test : AIEEE, IIT-JEE, CET
(Important For 10+1 & 10+2 Science Students)
Test 5
(1) Due to the presence of an unpaired
electron, free radicals are:
(a) Chemically reactive
(b) Chemically inactive
(c) Anions
(d) Cations
Answer (a) Chemically reactive
(2) Lattice energy of an ionic compounds
depends upon
(a) Charge on the ion only
(b) Size of the ion only
(c) Packing of ions only
(d) Charge on the ion and size of the
ion
Answer (d) Charge on the ion and size of
the ion
(3) The highest electrical conductivity of the following aqueous solutions is of
(a) 0.1 M acetic acid
(b) 0.1 M chloroacetic acid
(c) 0.1 M fluoroacetic acid
(d) 0.1 M difluoroacetic acid
Answer (d) 0.1 M difluoroacetic acid
(4) Which one of the following statements is
NOT true about the effect of an increase in temperature on the distribution of
molecular speeds in a gas?
(a) The most probable speed increases
(b) The fraction of the molecules with
the most probable speed increases
(c) The distribution becomes broader
(d) The area under the distribution
curve remains the same as under the lower temperature
Answer (b) The fraction of the molecules
with the most probable speed increases
(5) Two solutions of a substance (non
electrolyte) are mixed in the following manner. 480 ml of 1.5 M first solution +
520 mL of 1.2 M second solution. What is the molarity of the final mixture?
(a) 1.20 M
(b) 1.50 M
(c) 1.344 M
(d) 2.70 M
Answer (c) 1.344 M
(6) A reaction involving two different
reactants can never be
(a) Unimolecular reaction
(b) First order reaction
(c) second order reaction
(d) Bimolecular reaction
Answer (a) Unimolecular reaction
(7) If we consider that 1/6 in place of 1/12 mass of carbon atom is taken to be
the relative atomic mass unit, the mass of one mole of a substance will
(a) Decrease twice
(b) Increase two fold
(c) Remain unchanged
(d) Be a function of the molecular mass
of the substance
Answer (c) Remain unchanged
(8) In a multi – electron atom, which of the
following orbitals described by the three quantum numbers will have the same
energy in the absence of magnetic acid and electric fields?
(1) n = 1, l = 0, m = 0
(2) n = 2, l = 0, m = 0
(3) n = 2, l = 1, m = 1
(4) n = 3, l = 2, m = 1
(5) n = 3, l = 2, m = 0
(a) (a) and (b)
(b) (b) and (c)
(c) (c) and (d)
(d) (d) and (e)
Answer (d) (d) and (e)
(9) During the process of electrolytic refining of copper, some metals present
as impurity settle as ‘anode mud’ These are
(a) Sn and Ag
(b) Pb and Zn
(c) Ag and Au
(d) Fe and Ni
Answer (c) Ag and Au
(10) The disperse phase in colloidal iron (III)
hydroxide and colloidal gold is positively and negatively charged, respectively,
which of the following statements is NOT correct?
(a) magnesium chloride solution
coagulates, the gold sol more readily than the iron
(III) hydroxide sol.
(b) sodium sulphate solution causes
coagulation in both sols
(c) mixing the sols has no effect
(d) coagulation in both sols can be
brought about by electrophoresis
Answer (c) mixing the sols has no effect