The solubility of Al(OH)₃ is 'S' mol L^-1. The solubility product will be

• S²

• S³

• 27 S⁴

• 27 S³

When 1 M H₂SO₄ is completely neutralized by NaOH, the heat liberated is 114.64 kJ. What is the enthalpy of neutralization?

• + 114.64 kJ

• -114.64 kJ

• -57.32 kJ

• + 57.32 kJ

$\frac{{\mathrm{K}}_{\mathrm{p}}}{{\mathrm{K}}_{\mathrm{c}}}$ for the reaction

CO (g) + $\frac{1}{2}$ O₂ (g) $\rightleftharpoons$ CO₂ (g) is

• RT

• $\frac{1}{\sqrt{\mathrm{RT}}}$

• $\sqrt{\mathrm{RT}}$

• $\frac{1}{\mathrm{RT}}$

A particle 'A' moving with a certain velocity has the de-Broglie wavelength 1 Å. For a particle 'B' with mass 25% of 'A' and velocity 75% of 'A'. The de-Broglie wave length of 'B' will be

• 3 Å

• 5.33 Å

• 6.88 Å

• 0.68 Å

The reaction,

3ClO^- (aq) → ClO${}_3^{-}$ (aq) + 2Cl^- (aq) is an example of

• oxidation reaction

• reduction reaction

• disproportionation reaction

• decomposition reaction

Which compound is aromatic?

The geometrical and optical isomers of complex [Pt(NH₃)(Br)(Cl)(Py)] respectively 

• 2, 2

• 0, 3

• 2, 1

• 3, 0

One of the isomer of the 5^th member of alkyne series is optically active. It is

• 4-methyl pent-2-yne

• 3-methyl pent-1-yne

• 4-methyl pent-1-yne

• 3, 3-dimethyl but-1-yne

19.

The substance not likely to contain CaCO₃ is

• marble statue

• calcined gypsum

• sea shells

• dolomite

Schiff's nitrometre is filled with

• mercury

• water over mercury seal

• KOH solution over mercury seal

• toulene over mercury seal