Conductivity of a saturated solution of a sparingly soluble salt AB at 298 K is 1.85 10^-6 Sm^-1. Solubility product of the salt AB at 298 K is

(Given, $\wedge {°}_{\mathrm{m}}$ (AB) = 140  Sm² mol^-1)

• 5.7 × 10^-12

• 1.32 × 10^-12

• 7.5 × 10^-12

• 1.74 

Among the elements from atomic number 1 to 36, the number of elements which have an unpaired electron in their s subshell is

• 2

• 7

• 6

• 9

The statement that is not correct is

• Compressiblity factor measures the deviation of real gas from ideal behaviour

• Van der Waals constant 'a' measures extent of intermolecular attractive forces for real gases

• Cnlical temperature is the lowest temperature at which liquefaction of a gas first occurs

• Boyle point depends on the nature of real gas

The correct arrangement for the ions in the increasing order of their radii is

• Na⁺, Cl^-, Ca²⁺

• Ca²⁺, K⁺, S^2-

• Na⁺, Al³⁺, Be²⁺

• Cl^-, F^-, S^2-

The correct arrangement of the species in the decreasing order of the bond length between carbon and oxygen in them is

• CO, CO₂, HCO${}_2^{-}$, CO${}_3^{2-}$

• CO₂,CO, CO${}_3^{2-}$, HCHO${}_2^{-}$

• CO${}_3^{2-}$, HCO${}_2^{-}$, CO₂, CO

• CO, CO${}_3^{2-}$, CO₂, HCO${}_2^{-}$

The species that is not hydrolysed in water is

• P₄O₁₀

• BaO₂

• Mg₈N₂

• CaC₂

For the properties mentioned, the correct trend for the different species is in

• strength as Lewis acid - BCl₃ > AlCl₃ > GaCl₃

• inert pair effect - Al > Ga > ln

• oxidising property - Al³⁺ > ln³⁺ > Ti³⁺

• first ionization enthalpy - B > Al > Ti

28.

A correct statement is

• [Co(NH₃)₆]²⁺ is paramagnetic

• [MnBr₄]^2- is tetrahedral

• [CoBr₂(en)₂]^- exhibits linkage isomerism

• [Ni(NH₃)₆]²⁺ is an inner orbital complex

An aromatic compound 'A' (C₇H₉N) on reacting with NaNO₂/HCl at 0°C forms benzyl alcohol and nitrogen gas. The number of isomers possible for the compound 'A' is

• 5

• 7

• 3

• 6

Conversion of oxygen into ozone is non-spontaneous at

• all temperature

• high temperature

• room temperature

• low temperature