Geometrical isomerism is shown by

• -C - C-

• > C = C <

• -C ≡ C - 

• None of these

The oxidation state of iron in K₄[Fe(CN)₆] is

• 1

• 4

• 3

• 2

Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite

• is an allotropic form of carbon

• ia a non-crystalline substance

• has carbon atoms arranged in large plates of ring of strongly bond carbon atoms with weak interplate bonds

• has molecules of variable molecular masses like polymers

34.

Which one of the following has maximum number of atoms of oxygen?

• 2 gm of carbon monoxide

• 2gm of carbon dioxide

• 2 gm of sulphur dioxide

• 2 gm of water

Presence of halogen in organic compounds can be detected using

• Leibig's test

• Duma's test

• Kjeldahl test

• Beilstien's test

The number of unidentate ligands in the complex ion is called

• oxidation number

• primary valency

• coordination number

• EAN

2SO₂ (g) + O₂ (g) $\stackrel{{\mathrm{V}}_2{\mathrm{O}}_5}{\rightleftharpoons }$ is an example for 

• neutralisation reaction

• homogeneous catalysis

• heterogeneous catalysis

• irreversible reaction

Which one of the following is a second order reaction?

• H₂ + Br₂ → 2HBr

• NH₄NO₃ → N₂ + 3H₂O

• H₂ + Cl₂ $\stackrel{\mathrm{sunlight}}{\to }$ 2HCl

• CH₃COOCH₃ + NaOH → CH₃COONa + H₂O

One mole of oxygen at 273 K and one mole of sulphur dioxide at 546 K are taken in two separate containers, then,

• kinetic energy of O₂ > kinetic energy of SO₂

• kinetic energy of O₂ < kinetic energy of SO₂

• kinetic energy of both are equal

• None of the above

In the periodic table metals usually used as catalysts belong to

• f-block

• d-block

• p-block

• s-block