391.

Which of the following is pseudo halogen?

• IF₇

• (CN)₂

• ICl${}_2^{-}$

• I${}_3^{-}$

Correct order of electron affinities of halogens is

• F> Cl> Br> I

• I> Br> Cl> F

• Cl> F>I>Br

• Cl>F>Br>I

If NO₂(N₂O₄) is dissolved in NaOH, we get solution of

• NaNO₂

• NaNO₃

• mixture of NaNO₂ and NaNO₃

• NaNO₄

Hypochlorous acid is

• HOCl

• HClO₂

• HClO₃

• HClO₄

Which one of the following gases has both oxidising as well as reducing property?

• CO

• SO₂

• H₂S

• PH₃

The formula of chromyl chloride is

• CrO₂Cl₂

• CrOCl₂

• CrCl₃

• Cr₂OCl₂

Among the following, the group of molecules that undergoes rapid hydrolysis is

• SF_6, Al₂Cl₆, SiMe₄

• BCl₃, SF₆, SiCl₄

• BCl₃, SiCl₄, PCl₅

• SF₆, Al₂Cl₆, SiCl₄

A silver iodide sol has been prepared by adding slight excess of KI solution to AgNO₃ solution having the same concentration as that of KI solution. The silver iodide sol particles are

• positively charged

• negatively charged

• neutral

• partially positively and partially negatively charged

P₄O₁₀ on reacting with water does not form

• tetrametaphosphoric acid

• phosphorus acid

• orthophosphoric acid

• pyrophosphoric acid

Chlorine reacts with carbon disulphide in presence of I₂ catalyst to form

• CHCl₃

• CHI₃

• CCl₄

• C₂H₅Cl