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Reactivity with Halogens and Hydrogen (Group 2)

Here, A, B, C...

Question

Here, (A), (B), (C), (D), (E), (F) ,(G) and (H) are as follows:

(A) : $(N H_{4})_{2} C r_{2} O_{7}$ (B) : $N H_{3}$ (C) : $C r_{2} O_{3}$
(D) : $N_{2}$ (E) : $A l N$ (F) : $C r C l_{3}$ (G) : $N a_{2} C r O_{4}$
(H) : $P b C r O_{4}$

Write the above reaction.

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Solution

Orange coloured ammonium dichromate (compound A) on heating forms nitrogen gas (compound D ) and residue C which is chromium (III) oxide and green in colour.
$(N H_{4})_{2} C r_{2} O_{7} Δ - \to N_{2} + C r_{2} O_{3} + 4 H_{2} O$
When ammonium dichromate is heated in presence of NaOH, ammonia gas (compound B) is evolved.
$(N H_{4})_{2} C r_{2} O_{7} + 2 N a O H Δ - \to 2 N H_{3} + 2 H_{2} O + N a_{2} O + 2 C r O_{3}$
Ammonia reacts with HCl to form white fumes of ammonium chloride.
$N H_{3} + H C l \to N H_{4} C l w h i t e f u m e s$
When nitrogen is heated with aluminum, aluminum nitride is obtained.
$2 A l + N_{2} h e a t - - \to 2 A l N E$
AlN on hydrolysis forms aluminum hydroxide and ammonia gas (compound B).
$A l N + 3 H_{2} O \to A l (O H)_{3} + N H_{3} ↑ .$
Chromium trioxide on treatment with HCl forms chromic chloride (compound F).
$C r_{2} O_{3} + 6 H C l \to 2 C r C l_{3} + 3 H_{2} O$
Chromic chloride on heating with NaOH and hydrogen peroxide forms sodium chromate (compound G).
$2 C r C l_{3} + 4 N a O H + 2 H_{2} O_{2} h e a t - - \to 2 N a_{2} C r O_{4} + 6 H C l + H_{2}$
Sodium chromate reacts with acetic acid and lead acetate to form yellow precipitate of lead chromate which is compound (H).
$N a_{2} C r O_{4} + (C H_{3} C O O)_{2} P b C H_{3} C O O H - ------ \to P b C r O_{4} ↓ y e l l o w + 2 C H_{3} C O O N a$

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Similar questions

N H_{4} N O_{2}

N H_{3}

N a N O_{3}

N_{2}

A l N

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

↓ N a O H

H C l - - \to

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

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

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

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

N_{2}

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

{N H}_{3}

A I N

{C r C l}_{3}

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

{P b C r O}_{4}

ξ = {a, b, c, d, e, f, g, h}, A = {b, c, d, e, f}, B = {a, b, c, g, h}

C = {c, d, e, f, g}

C - (B \cap A)

ξ

a, b, c, d, e, f, g, h

A =

b, c, d, e, f

B =

a, b, c, g, h

C =

c, d, e, f, g

C

^{'}

- B

^{'}

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