JEE Advanced 2016 · Paper 2

The geometries of the ammonia complexes of Ni²⁺, Pt²⁺ and Zn²⁺, respectively, are

1. Aoctahedral, square planar and tetrahedral
2. Bsquare planar, octahedral and tetrahedral
3. Ctetrahedral, square planar and octahedral
4. Doctahedral, tetrahedral and square planar

According to Molecular Orbital Theory,

1. AC₂²⁻ is expected to be diamagnetic
2. BO₂²⁺ is expected to have a longer bond length than O₂
3. CN₂⁺ and N₂⁻ have the same bond order
4. DHe₂⁺ has the same energy as two isolated He atoms

Mixture(s) showing positive deviation from Raoult’s law at 35 °C is(are)

1. Acarbon tetrachloride + methanol
2. Bcarbon disulphide + acetone
3. Cbenzene + toluene
4. Dphenol + aniline

The CORRECT statement(s) for cubic close packed (ccp) three dimensional structure is(are)

1. AThe number of the nearest neighbours of an atom present in the topmost layer is 12
2. BThe efficiency of atom packing is 74%
3. CThe number of octahedral and tetrahedral voids per atom are 1 and 2, respectively
4. DThe unit cell edge length is 2√2 times the radius of the atom

Extraction of copper from copper pyrite (CuFeS₂) involves

1. Acrushing followed by concentration of the ore by froth-flotation
2. Bremoval of iron as slag
3. Cself-reduction step to produce ‘blister copper’ following evolution of SO₂
4. Drefining of ‘blister copper’ by carbon reduction

The nitrogen containing compound produced in the reaction of HNO₃ with P₄O₁₀

1. Acan also be prepared by reaction of P₄ and HNO₃
2. Bis diamagnetic
3. Ccontains one N-N bond
4. Dreacts with Na metal producing a brown gas

For ‘invert sugar’, the correct statement(s) is(are) (Given: specific rotations of (+)-sucrose, (+)-maltose, L-(−)-glucose and L-(+)-fructose in aqueous solution are +66°, +140°, −52° and +92°, respectively)

1. A‘invert sugar’ is prepared by acid catalyzed hydrolysis of maltose
2. B‘invert sugar’ is an equimolar mixture of D-(+)-glucose and D-(−)-fructose
3. Cspecific rotation of ‘invert sugar’ is −20°
4. Don reaction with Br₂ water, ‘invert sugar’ forms saccharic acid as one of the products