JEE Advanced 2011 · Paper 1

Extra pure N₂ can be obtained by heating

1. ANH₃ with CuO
2. BNH₄NO₃
3. C(NH₄)₂Cr₂O₇
4. DBa(N₃)₂

Geometrical shapes of the complexes formed by the reaction of Ni²⁺ with Cl⁻, CN⁻ and H₂O, respectively, are

1. Aoctahedral, tetrahedral and square planar
2. Btetrahedral, square planar and octahedral
3. Csquare planar, tetrahedral and octahedral
4. Doctahedral, square planar and octahedral

Dissolving 120 g of urea (mol. wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is

1. A1.78 M
2. B2.00 M
3. C2.05 M
4. D2.22 M

Among the following compounds, the most acidic is

1. Ap-nitrophenol
2. Bp-hydroxybenzoic acid
3. Co-hydroxybenzoic acid
4. Dp-toluic acid

Extraction of metal from the ore cassiterite involves

1. Acarbon reduction of an oxide ore
2. Bself-reduction of a sulphide ore
3. Cremoval of copper impurity
4. Dremoval of iron impurity

The correct statement(s) pertaining to the adsorption of a gas on a solid surface is (are)

1. AAdsorption is always exothermic.
2. BPhysisorption may transform into chemisorption at high temperature.
3. CPhysisorption increases with increasing temperature but chemisorption decreases with increasing temperature.
4. DChemisorption is more exothermic than physisorption, however it is very slow due to higher energy of activation.

According to kinetic theory of gases

1. Acollisions are always elastic.
2. Bheavier molecules transfer more momentum to the wall of the container.
3. Conly a small number of molecules have very high velocity.
4. Dbetween collisions, the molecules move in straight lines with constant velocities.