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Preparation o...

Preparation of Bromine and Iodine

Trending Questions

Q. In the manufacture of bromine from sea water, the mother liquor containing bromides is treated with

carbon dioxide
chlorine
iodine
sulphur dioxide.

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Q. Which of the following options about the oxidising property of

K M n O_{4}

in acidic medium is incorrect?

$H_{2} S$ can be oxidised to S
$S O_{3}^{2 -}$ can be oxidised to $S O_{4}^{2 -}$
$I^{-}$ can be oxidised to $I_{2}$
None of the above

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Q.

Iodine is formed when potassium iodide reacts with:

$Z n S O_{4}$
$C u S O_{4}$
$C l_{2}$
$B r_{2}$

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Q.

Thyroxine, a hormone produced in the thyroid gland in humans, contains:

Fluorine
Bromine
Iodine
Chlorine

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Q. In the manufacture of bromine from sea water, the mother liquor containing bromides is treated with

carbon dioxide
chlorine
iodine
sulphur dioxide.

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Q.

Complete the reaction :

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Q. Which one of the following statements is correct when

S O_{2}

is passed through acidified

K_{2} C r_{2} O_{7}

solution?

Green $C r_{2} (S O_{4})_{3}$ is formed
The solution turns blue
The solution is decolourized
$S O_{2}$ is reduced

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Q. Iodine is formed when potassium iodide reacts with a solution of:

$Z n S O_{4}$
$C u S O_{4}$
${(N H_{4})}_{2} S O_{4}$
$N a_{2} S O_{4}$

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Q.

Iodine is formed when potassium iodide reacts with:

$Z n S O_{4}$
$C u S O_{4}$
$C l_{2}$
$B r_{2}$

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Q.

B r_{2}

turns starch iodide paper :

blue
red
colourless
yellow

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Q. Find out the number of reagents which can oxidise

M e - O | | C - H

(I) I_{2} / N a O H (I I) K M n O_{4} / H^{\oplus} (I I I) Tollen's reagent (I V) L i A l H_{4} (V) N a B H_{4}

(V I) N H_{2} - N H_{2} / N a O H

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Q. Iodine is formed when potassium iodide reacts with :

$Z n S O_{4}$
$C u S O_{4}$
$C l_{2}$
$B r_{2}$

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Q.

Iodine is formed when potassium iodide reacts with:

$Z n S O_{4}$
$C u S O_{4}$
$C l_{2}$
$B r_{2}$

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Q.

Which one of the following elements, in its diatomic molecular state, has the least bond energy?

Fluorine
Chlorine
Bromine
Iodine

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Q. Which of the following does not decolourize iodine?

$N a_{2} S O_{3}$
$N a_{2} S_{2} O_{3}$
$N a C l$
$N a O H$

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Q. Assertion :

C l_{2}

gas bleaches the articles permanently. Reason:

C l_{2}

is a strong reducing agent.

Read the above assertion and reason and choose the correct option regarding it.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct but Reason is incorrect
Both Assertion and Reason are incorrect

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Q. Match the compounds given in Column-I with the products formed and the reaction type when they react with hypo given in Column-II and select the correct answer using the code given below :

	Column I (Compound)		Column-II (Product with Hypo)
(P)	$C u S O_{4}$	(1)	$N a_{2} S_{4} O_{6}$
(Q)	$H C l$	(2)	$S$
(R)	$H_{2} S O_{4}$	(3)	$S O_{2}$
(S)	$I_{2}$	(4)	Oxidised
		(5)	Reduced

P(4); Q(1, 5); R(2, 3); S(2)
P(1, 4); Q(2, 3); R(2, 3); S(1, 5)
P(3, 5); Q(1, 3); R(2, 4, 5); S(1, 2, 3)
P(2, 4); Q(3, 4); R(1, 4); S(2, 3)

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Q. In the manufacture of bromine from sea water, the mother liquor containing bromides is treated with

carbon dioxide
chlorine
iodine
sulphur dioxide.

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Q.

Which one of the following elements, in its diatomic molecular state, has the least bond energy?

Chlorine
Bromine
Fluorine
Iodine

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Q. HBr and HI reduce sulphuric acid, HCl can reduce

K M n O_{4}

and HF can reduce

$H_{2} S O_{4}$
$K_{2} C r_{2} O_{7}$
$K M n O_{4}$
None of the above

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Q. Which of the following compound does not undergo any redox reaction in presence of dil. HCl in room temperature?

Calcium oxychloride
Sodium thiosulphate
Sodium oxalate
Sodium nitrite

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Q. Cross cannizzaro reaction is an example of :

redox reaction
disproportionation reaction
only oxidation reaction
both ( A ) and ( B )

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Q.

Thyroxine, a hormone produced in the thyroid gland in humans, contains:

Fluorine
Bromine
Iodine
Chlorine

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Q. In which of the following cases, change of colour can be an indication of extent of the reaction?

$S O_{2} (g) + \frac{1}{2} O_{2} (g) ⇋ S O_{3} (g)$
$N_{2} (g) + 3 H_{2} (g) ⇋ 2 N H_{3} (g)$
$2 H I (g) ⇋ H_{2} (g) + I_{2} (g)$
$C (g r a p h i t e) + C O_{2} (g) ⇋ 2 C O (g)$

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Q. Iodine is released when potassium iodide reacts with

$Z n S O_{4}$
$C u S O_{4}$
$F e S O_{4}$
$(N H_{4})_{2} S O_{4}$

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Q.

Thyroxine, a hormone produced in the thyroid gland in humans, contains:

Fluorine
Bromine
Iodine
Chlorine

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Q.

Which one of the following elements, in its diatomic molecular state, has the least bond energy?

Fluorine
Chlorine
Bromine
Iodine

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Q.

1^{0}

,

2^{0}

and

3^{0}

alcohols may be distinguished from one another by :

Oxidation method
Action of hot $H I$
Lucas reagent
Both A and C

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