Which of ht efollowing is wrong for hydr...

Which of ht efollowing is wrong for hydrogen fluoride?

it has low dielectric constant and high visosity

the conductivity of pure `HF` is comparable with that of pure water

although `HF` is a weak acid in water the strength of anhydrous `HF` is comparable with that of anhydrous `H_(2)SO_(4)`

`HF` acids as the strong acid in reaction where `HNO_(3)` acts like a base

Text Solution

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The correct Answer is:

It has high dielectric constant as It has the highest value of dipole moments anomg all the hydrogen halides. Though the individual `HF` units are associated into larger aggregates by mean of hydrogen bonding. It has low visocity because `F` uses only one lone pair for hydrogen bonding.

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Which of the following is wrong ?

Red phosphorus has a polymeric structure

White phosphorus has higher internal energy than red phosphorus

Red phosphorus is more active than white phosphorus

White phosphorus is metastable at all temperature upto the melting point of red phosphorus

Which one of the following is wrong?

The elements on the main diagonal of a symmetric matrix are all zero

The elements on the main diagonal of a skew-symmetric matrix are all zero

For any square matrix `A, 1/2(A+A')` is symmetric

For any square matrix `A, 1/2(A-A')` is skew-symmetric

Which is wrong

Sporangiospores of Rhizopus are diploid

Rhizopus belongs to zygomycetes

Dominant phase of chlamydomonas is haploid

zoospores of chlamydomonas are haploid.