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The colour of copper sulphide is :...

The colour of copper sulphide is :

A

black

B

blue

C

brown

D

red.

Text Solution

Verified by Experts

The correct Answer is:
A
CuS obtained as ppt. with `H_2S` is black .
`Cu^(2+) + H_2S to underset("Black")(CuS) + 2H^(+)`
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Knowledge Check

  • Two platinum electrodes were immersed in a solution of cupric sulphate and electric current passed through the solution. After some time it was found that the colour of copper sulphate disappeared with evolution of gas at the electrode. The colourless solution contains

    A
    Sulphuric acid
    B
    Platinum sulphate
    C
    Copper sulphate
    D
    Copper hydroxide

  • The ore of copper is

    A
    Malachite
    B
    Apatite
    C
    Dolomite
    D
    Haematite

  • The solution of copper sulphate in which copper rod is dipped is diluted to 10 times. The reduction potential of copper

    A
    decreases by about 60 mV.
    B
    decreases by about 30 mV
    C
    decreases by 30 V
    D
    increases by about 30 mV

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    The blue colour of copper sulphate starts fading when a zinc rod is dipped in ti. State the reason and write the chemical equation for the reaction involved.

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