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Concentration Terms - An Introduction (w/w etc)

Black colored...

Question

Black colored compound (A) is______________.

A

P b S

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B

C u S

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C

A g_{2} S

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D

All of these

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Solution

The correct option is B All of these
Option (D) is correct.
Black colored compound (A) may be $P b S$ , $C u S$ , $A g_{2} S$ .
All are black and give gas with $d i l . H_{2} S O_{4}$
$S^{2 -} + 2 H^{+} \to H_{2} S ↑$

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Similar questions

P b S, C u S, H g S, M n S, A g_{2} S, N i S, C o S, B i_{2} S_{3}

_{2}

, the total number of black coloured sulphides are:

X

Y

Z

in the following equations :
i)

C u + C O_{2} m o i s t u r e - -------- \to

(X)

A g + Y a i r - ---- \to

({A g}_{2} S)

F e S O_{4} h e a t - ----- \to {F e}_{2} O_{3} + S O_{3} + Z

Q. The solubility product of

C u S, {A g}_{2} S

H g S

10^{- 37}, 10^{- 44}

10^{- 54}

respectively. The solubility of these sulphides will be in the order:

Q. The color of

C u^{+}

Q. A reddish brown colored element

X

on heating in air, becomes a black colored compound

Y

X

Y

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Concentration Terms - An Introduction (w/w etc)

Standard XII Chemistry

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