In the conversion Br2BrO3, the oxidation state of bromine changes from 

(1) – 1 to – 1

(2) 0 to – 1

(3) 0 to + 5

(4) 0 to – 5

Br2BrO3 रूपांतरण में, ब्रोमीन की ऑक्सीकरण अवस्था में कहाँ से कहाँ तक परिवर्तन होता है- 

(1) – 1 से –1

(2) 0 से –1

(3) 0 से +5

(4) 0 से – 5

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The oxidation state of nitrogen in N3H is.

(1) +13

(2) + 3

(3) –1

(4) 13

N3H में नाइट्रोजन की ऑक्सीकरण अवस्था है-  [NCERT 1977, 81]

(1) +13

(2) + 3

(3) –1

(4) 13

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Oxidation number of P in Mg2P2O7 is 

(1) + 3

(2) + 2

(3) + 5

(4) – 3

Mg2P2O7 में P की ऑक्सीकरण संख्या है-               

(1) + 3

(2) + 2

(3) + 5

(4) – 3

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Mg(OH)2 + HCl Mg(OH)Cl + H2O2, the equivalent weight of Mg(OH)2 will be (M= Mol. wt. of Mg(OH)2)

1. zero

2. M

3. M/2

4. M/4

Mg(OH)2 + HCl Mg (OH)Cl + H2O2, Mg(OH)2 का तुल्यांकी भार होगा? (M =  Mg(OH)का मोलर द्रव्यमान)

1. शून्य 

2. M

3. M/2

4. M/4

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In the aluminothermic process, aluminium acts as:

1. an oxidising agent

2. a flux

3. a reducing agent

4. a solder

ऐलुमिनोतापी प्रक्रम में, ऐलुमिनियम निम्नानुसार कार्य करता है:

(1) एक ऑक्सीकारक 

(2) एक गालक 

(3) एक अपचायक 

(4) एक टाँका

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The oxidation state of Ni in Ni(CO)4 is:

1. zero

2. +4

3. +8 

4. +2

Ni(CO)4 में Ni की ऑक्सीकरण अवस्था है:

(1) शून्य 

(2) +4

(3) +8 

(4) +2

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Oxidation state of +1 for phosphorus is found in:

1. H3PO3 

2. H3PO4

3. H3PO2

4. H4P2O7

फास्फोरस के लिए +1 ऑक्सीकरण अवस्था किसमें पायी जाती है:

(1) H3PO3 

(2) H3PO4

(3) H3PO2

(4) H4P2O7

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Milliequivalents of a solute in a solution can be given by:

1. Mzeq. = M x Vin mL

2. Meq. = N x Vin mL

3. Mzeq. = massEq. mass×1000

4. both 2 and 3

किसी विलयन में एक विलेय के मिलीतुल्यांक निम्न द्वारा दिए जा सकते हैं:

(1) मिलीतुल्यांक = M x V mL में 

(2) मिलीतुल्यांक = N x VmL में 

(3) मिलीतुल्यांक =द्रव्यमान तुल्यांक द्रव्यमान ×1000

(4) दोनों (b) और (c)

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KMnO4 in acid medium is always reduced to:

1. Mn4+ 

2. Mn2+ 

3. Mn6+

4. Mn

अम्लीय माध्यम में KMnOहमेशा किसमें अपचयित हो जाता है?

(1) Mn4+ 

(2) Mn2+ 

(3) Mn6+

(4) Mn

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Sn++ loses two electrons in a reaction. What will be the oxidation number of tin after the reaction

(1) + 2

(2) Zero

(3) + 4

(4) – 2

Sn++ एक अभिक्रिया में दो इलेक्ट्रॉनों को त्याग देता है। अभिक्रिया के बाद टिन की ऑक्सीकरण संख्या क्या होगी

(1) +2

(2) शून्य 

(3) +4

(4) –2

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