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Standard XII

Chemistry

Allotropes of Phosphorus

Which of the ...

Question

Which of the following statements are correct?
I. $N O$ acts both as an oxidising as well as a reducing agent.
II. $N_{2} O_{5}$ with alkalies gives nitrates.
III. Moist $N H_{3}$ gas is dried over $C a C l_{2}$ .
IV. Action of $N H_{3}$ on excess of $C l_{2}$ gives $N H_{4} C l$ as stable product.

Only I and II

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Only II and III

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Only I and III

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Only III and IV

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Solution

The correct option is A Only I and II
I. Nitric oxide acts both as an oxidising as well as a reducing agent while all other nitrogen oxide acts as oxidising agents only.

II. $N_{2} O_{5}$ with alkalies gives nitrates. Example:
$N_{2} O_{5} + 2 N a O H \to 2 N a N O_{3} + H_{2} O$

III. The moisture present in ammonia may be removed by passing through a glass tower backed with quick lime, $C a O$ . It forms a complex with anhydrous $C a C l_{2}$ .

IV. With excess of $C l_{2}$ , nitrogen trichloride and hydrogen chloride are formed.
$N H_{3} + 3 C l_{2} \to N C l_{3} + 3 H C l$

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Similar questions

Which of the following is/are correct?

$i . 1 k m = 10^{3} m$

$i i . 1 k m = 10^{5} c m$

$i i i . 1 k m = 10^{7} m m$

Q. Which of the following statements are correct?
(I) Both melting and boiling points of

H_{2} O

are higher than those of

H_{2} T e

.
(II) In both

N_{2} O_{5}

and

N_{2} O_{4}

all

N - O

bond lengths are equivalent.
(III) In both crystalline

N a H C O_{3}

and

K H C O_{3} . H C O_{3}^{-}

forms only dimeric anion through hydrogen bond.
(IV)

B_{2}, C_{2}, N_{2}

on further ionization (removal of single electron) form thermodynamically less stable species.

Digital signals

(i) Do not provide a continuous set of values,

(ii) Represent values as discrete steps,

(iii) Can utilize binary system, and

(iv) Can utilize decimal as well as binary systems.

Which of the above statements are true?

(a) (i) and (ii) only

(b) (ii) and (iii) only

(d) All of (i), (ii), (iii) and (iv).

About 'X' and 'Y' the correct statements are

I. 'X' is inorganic acid 'Y' on oxidation with acidified KMnO₄ gives organic acid

II. In 'X' central atom exhibit sp³ and in 'Y' 1^st and 2^nd carbon exhibit sp² and sp³ hybridisations

III. Both 'X' and 'Y' acts as reducing agents

IV. Both 'X' and 'Y' are oxidized products in the reaction

Q. Which of the following complexes is/are square planar in shape ?
(I)

[N i (C N)_{4}]^{2 -}

(II)

[M n C l_{4}]^{2 -}

(III)

[Z n C l_{4}]^{2 -}

(IV)

[N i (N H_{3})_{4}]^{2 +}

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Which of the following statements are correct? I. NO acts both as an oxidising as well as a reducing agent. II. N2O5 with alkalies gives nitrates. III. Moist NH3 gas is dried over CaCl2. IV. Action of NH3 on excess of Cl2 gives NH4Cl as stable product.

Which of the following statements are correct?
I. $N O$ acts both as an oxidising as well as a reducing agent.
II. $N_{2} O_{5}$ with alkalies gives nitrates.
III. Moist $N H_{3}$ gas is dried over $C a C l_{2}$ .
IV. Action of $N H_{3}$ on excess of $C l_{2}$ gives $N H_{4} C l$ as stable product.