Ethyl benzoate reacts with PCl₅ to give

• C₂H₅Cl + C₆H₅COCl + POCl₃ + HCl

• C₂H₅Cl + C₆H₅COCl + POCl₃

• CH₃COCl + C₆H₅COCl + POCl₃

• C₂H₅Cl + C₆H₅COOH + POCl₃

Urea is preferred to ammonium sulphate as a nitrogenous fertiliser because

• it is more soluble in wate

• it is cheaper than ammonium sulphate

• it is quite stable

• it does not cause acidity in the soil

In the following, the element with the highest ionisation energy is :

• [Ne]3s²3p¹

• [Ne]3s² 3p³

• [Ne]3s² 3p²

• [Ne]3s² 3p⁴

In the conversion of Br₂ to Br${}_3^{-}$, the oxidations number of Br changes from:

• zero to +5

• +1 to +5

• zero to -3

• +2 to +5

Hydrogen bond is strongest in :

• S-H····O

• O-H····S

• F-H····F

• O-H····N

1026.

Liquor ammonia bottles are opened only after cooling. This is because

• it is only a mild explosive

• it is a corrosive liquid

• it is a lachrymatory

• it generates high vapour pressure and mild explosive

When plants and animals decay, the organic nitrogen is converted into inorganic nitrogen. The inorganic nitrogen is in the form of

• ammonia

• elements of nitrogen

• nitrates

• nitrides

The formation of O${}_2^{+}$[PtF₆]^- is the basis for the formation of xenon fluorides. This is because :

• O₂ and Xe have comparable size

• Both O₂ and Xe are gases

• O₂ and Xe have both comparable ionisation size energies and comparable sizes.

• O₂ and Xe have comparable electro- negativities.

The formula mass of Mohr's salt is 392. The iron present in it is oxidised by KMnO₄ in acid medium. The equivalent mass of Mohr's salt is :

• 392

• 31.6

• 278

• 156

The brown ring test for nitrates depends on :

• the reduction of nitrate to nitric oxide

• oxidation of nitric oxide to nitrogen dioxide

• reduction of ferrous sulphate to iron

• oxidising action of sulphuric acid