JEE (MAINS) 2013 with Solutions

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AIEEE 2013 with Solutions

Sample Questions

The first ionization potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be:
(1) – 5.1 eV (3) –10.2 eV
(3) + 2.55 eV (4) – 2.55 eV

Which of the following is the wrong statement?
(1) O3 molecule is bent (2) Ozone is violet-black in solid state
(3) Ozone is diamagnetic gas (4) ONCl and ONO are not isoelectronic

A solution of (–) –1 – chloro –1 – phenylethane is toluene racemises slowly in the presence of a small amount of SbCl5, due to the formation of :
(1) carbene (2) carbocation
(3) free radical (4) carbanion

How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2?
(1) 0.9 L (2) 2.0 L
(3) 9.0 L (4) 0.1 L

A compound with molecular mass 180 is acylated with CH3COCl to get a compound with molecular mass 390. The number of amino groups present per molecule of the former compound is:
(1) 5 (2) 4
(3) 6 (4) 2

Synthesis of each molecule of glucose in photosynthesis involves:
(1) 10 molecules of ATP (2) 8 molecules of ATP
(3) 6 molecules of ATP (4) 18 molecules of ATP

Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar?
(1) S < Se < Ca < Ba < Ar (2) Ba < Ca < Se < S < Ar
(3) Ca < Ba < S < Se < Ar (4) Ca < S < Ba < Se < Ar

The gas leaked from a storage tank of the Union Carbide plant in Bhopal gas tragedy was:
(1) Methylamine (2) Ammonia
(3) Phosgene (4) Methylisocyanate

Which of the following exists as covalent crystals in the solid state?
(1) Silicon (2) Sulphur
(3) Phosphorous (4) Iodine

The circle passing through (1, −2) and touching the axis of x at (3, 0) also passes through the point
(1) (2, −5) (2) (5, −2)
(3) (−2, 5) (4) (−5, 2)

All the students of a class performed poorly in Mathematics. The teacher decided to give grace marks of 10 to each of the students. Which of the following statistical measures will not change even after the grace
marks were given ?
(1) median (2) mode
(3) variance (4) mean

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