HgS is

A

red in colour

B

black in colour

C

Both (A) and (B)

D

none.

Text Solution

Verified by Experts

HgS can exist both in red form and black form. Passing `H_(2)S` through a solution of `Hg^(2+)` salts gives black HgS. This black HgS on sublimation gives red form.
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Knowledge Check

  • The roasting of HgS in air produces

    A
    `HgO`
    B
    `HgCl_2`
    C
    `HgSO_4`
    D
    `Hg`

  • Total vapour pressure of mixture of 1 mole of volatile component A (P_(A)^(@)=100 mm Hg) and 3 mole of volatile component B (P_(B)^(@)=80 mm Hg) is 90 mm Hg . For such case :

    A
    there is positive deviation from Raoult's law
    B
    boiling point has been lowered
    C
    force of attraction between A and B is smaller than that between A and A or between B and B
    D
    all the above statements are correct

  • The total vapour pressure of a mixture of 1 mole of A ( P_A = 200 mm Hg ) and 3 mole of B ( P_B= 360 mm Hg) is 350 mm Hg. Then

    A
    There is no deviation from Raoult's law
    B
    There is positive deviation from Raoult's law
    C
    There is negative deviation from Raoult's law
    D
    Molecular masses of A and B are also required
    • DINESH PUBLICATION-PRINCIPLES RELATED TO PRACTICAL CHEMISTRY-Brain teasers-38
    1. HgS is

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