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Byju's Answer

Standard XII

Chemistry

Oxides and Oxoanions

A, B, C, D, E...

Question

(A), (B), (C), (D), (E) and (F) base on the reactions are

A : $Z n S$
B : $H_{2} S$
C : ${Z n S O}_{4}$
D : $P b S$
E : ${Z n (O H)}_{2}$
F : ${N a}_{2} {Z n O}_{2}$ or ${N a}_{2} [{Z n (O H)}_{4}]$

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Solution

The compound A is $Z n S$
The compound B is $H_{2} S$
The compound C is ${Z n S O}_{4}$
The compound D is $P b S$
The compound E is ${Z n (O H)}_{2}$
The compound F is ${N a}_{2} {Z n O}_{2}$ or ${N a}_{2} [{Z n (O H)}_{4}]$
ZnS reacts with dil sulphuric acid to form hydrogen sulphide gas and zinc sulphate.
$Z n S + H_{2} S O_{4} \to Z n S O_{4} + H_{2} S$
Hydrogen sulphide gas reacts with lead acetate to form black ppt of lead sulphide/
$P b (C H_{3} C O O)_{2} + H_{2} S \to P b S ↓ (b l a c k) + 2 C H_{3} C O O H$
Znc sulphate reacts with NaOH solution to form white ppt of sodium hydroxide which is soluble in excess NaOH to form
$Z n S O_{4} + 2 N a O H \to Z n (O H)_{2} ↓ + N a S O_{4}$
$Z n (O H)_{2} + 2 N a O H \to | u n d e r s e t s o d i u m z i n c a t e N a_{2} Z n O_{2} + 2 H_{2} O$
sodium zincate.
Sodium zincate reacts with hydrogen sulphide gas to form zinc sulphide.
$N a_{2} Z n O_{2} + H_{2} S \to Z n S + 2 N a O H$
Zinc sulphate reacts with ammonium hydroxide in presence of ammonium chloride and hydrogen sulphide to form zinc sulphide.
$Z n S O_{4} + 2 N H_{4} O H h e a t - - \to (N H_{4})_{2} S O_{4} + Z n (O H)_{2}$
$Z n (O H)_{2} + H_{2} S \to Z n S + 2 H_{2} O$

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Similar questions

A, B, C, D, E and F in the following are A:

N a_{2} S_{2} O_{3}

; B:

A g_{2} S_{2} O_{3}

; C:

N a_{3} [A g (S_{2} O_{3})_{2}]

; D :

A g_{2} S

; E :

H_{2} S O_{4}

; F:

B a S O_{4}

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solution of the cpmpound

(A) + g a s B - --- \to (C) δ \to (A) + (D)

conc. solution of

(C) c o n c . H_{2} S O_{4} - ------ \to (E)

(weak acid)

(D) +

cobalt oxide

Δ - \to (F)

(coloured bead)

(E) + C_{2} H_{5} O H Δ - \to

green edged flame

(G)

A to G based on the following reactions are:

{N a B O}_{2}

{C O}_{2}

{N a}_{2} B_{4} O_{7}

B_{2} O_{3}

H_{3} {B O}_{3}

{C o ({B O}_{2})}_{2}

(C_{2} H_{5} O)_{3} B

If the statement is true enter 1, else enter 0.

Q. Classify the following into Lewis acids and Lewis bases:
(a)

H_{2} O

(b)

N H_{3}

(c)

H^{+}

(d)

B F_{3}

(e)

A I H_{3}

(f)

R O H

(g)

C H_{3} N H_{2}

(h)

C N^{-}

(i)

^{+} C H_{3}

Lewis acids : (c), (d), (e), (i)
Lewis bases : (a), (b), (f), (g), (h)
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Q. Here, (A), (B), (C), (D) and (E) are as follows:
(A) :

N H_{4} N O_{2}

(B) :

N H_{3}

N a N O_{3}

(D) :

N_{2}

(E) :

A l N

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A(orange)

Δ - \to C (g) + r e s i d u e (c) (g r e e n) + H_{2} O

↓ N a O H

D(g)

H C l - - \to

white fumes

B(g)

A l - \to Δ (E) H_{2} O - - \to g a s (B)

Residue (C)

c o n c . H C l - ---- \to (F) N a O h, H_{2} O_{2} - ------ \to Δ G

(yellow)

C H_{3} C O O H - -------- \to (C H_{3} C O O)_{2} P b

H (yellow

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Compounda (A) to (H) are identified as (A)

({N H}_{4})_{2} {C r}_{2} O_{7}

, (B)

N_{2}

, (C)

{C r}_{2} O_{3}

, (D)

{N H}_{3}

, (E)

A I N

, (F)

{C r C l}_{3}

, (G)

{N a}_{2} {C r O}_{4}

and (H)

{P b C r O}_{4}

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(A), (B), (C), (D), (E) and (F) base on the reactions are A : ZnSB : H2S C : ZnSO4D : PbSE : Zn(OH)2F : Na2ZnO2 or Na2[Zn(OH)4]If the given statement is true enter 1, else enter 0.

(A), (B), (C), (D), (E) and (F) base on the reactions are

A : $Z n S$
B : $H_{2} S$
C : ${Z n S O}_{4}$
D : $P b S$
E : ${Z n (O H)}_{2}$
F : ${N a}_{2} {Z n O}_{2}$ or ${N a}_{2} [{Z n (O H)}_{4}]$

If the given statement is true enter 1, else enter 0.