An aqueous solution of 6.3 g oxalic acid dehydrate is made up to 250 mL. The volume of 0.1 N NaOH required to completely neutralize 10 mL of this solution is

1. 4 mL

2. 20 mL

3. 40 mL

4. 60 mL

6.3 g ऑक्सैलिक अम्ल निर्जलीकरण का जलीय विलयन 250 mL तक बनता है। इस विलयन के 10 mL को पूरी तरह से उदासीन करने के लिए आवश्यक 0.1 N NaOH की मात्रा है-

1. 4 mL

2. 20 mL

3. 40 mL

4. 60 mL

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Oxidation number of cobalt in K[Co(CO)4] is

(1) + 1

(2) + 3

(3) – 1

(4) – 3

K[Co(CO)4] में कोबाल्ट की ऑक्सीकरण संख्या है: [KCET 1996]

(1) + 1

(2) + 3

(3) – 1

(4) – 3

 53%

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Which acts as a reducing agent only?

1. SO2

2. HNO3

3. MnO2

4. H2S

कौन केवल अपचायक की तरह कार्य करता है?

1. SO2

2. HNO3

3. MnO2

4. H2S

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When a metal is burnt, its mass is increased by 24 percent. The equivalent mass of the metal will be:

1. 25

2. 24

3. 33.3

4. 76

जब किसी धातु को जलाया जाता है, तो उसका द्रव्यमान 24 प्रतिशत बढ़ जाता है। धातु का तुल्यांक द्रव्यमान होगा:

(1) 25

(2) 24

(3) 33.3

(4) 76

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The correct order of reducing power of halide ions is:

1. Cl- > Br- > I- > F-

2. Cl- >  I- > Br- > F-

3.  Br> Cl- > I- > F-

4.  I- > Br> Cl- > F-

हैलाइड आयनों की अपचायक क्षमता का सही क्रम है:

(1) Cl- > Br- > I- > F-

(2) Cl- >  I- > Br- > F-

(3)  Br> Cl- > I- > F-

(4)  I- > Br> Cl- > F-

 55%
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Which is not a redox change?

1. CaCO3 CaO + CO2

2. 2H2 + O2 2H2O

3. Na + H2 NaOH + 1/2 H2

4. MnCl3  MnCl2 + 1/2 Cl2

कौन सा एक रेडॉक्स परिवर्तन नहीं है?

(1) CaCO3 CaO + CO2

(2) 2H2 + O2 2H2O

(3) Na + H2NaOH + 1/2 H2

(4) MnCl3  MnCl2+ 1/2 Cl2

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Equivalent weight of a metal oxide is 20, the equivalent weight of sulphate of same metal will be 

(1) 60

(2) 69

(3) 108

(4) 54

एक धातु ऑक्साइड का तुल्यांकी भार 20 है, उसी धातु के सल्फेट का तुल्यांकी भार होगा?

(1) 60

(2) 69

(3) 108

(4) 54

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Among the following, identify the species with an atom in +6 oxidation state

1. MnO4-

2. Cr(CN)63-

3. NiF62-

4. CrO2Cl2

निम्नलिखित में से, +6 ऑक्सीकरण अवस्था में एक परमाणु वाली स्पीशीज़ की पहचान कीजिए-

1. MnO4-

2. Cr(CN)63-

3. NiF62-

4. CrO2Cl2

 65%
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The normality of 4% (mass/Vol.) NaOH is:

1. 0.1

2. 1.0

3. 0.05

4. 0.01

4% (द्रव्यमान/आयतन) NaOH की नॉर्मलता है:

(1) 0.1

(2) 1.0

(3) 0.05

(4) 0.01

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N2H4 + IO3- + 2H+ + Cl- ICl + N2 + 3H2O

The equivalent masses of N2Hand KIO3 respectively are :-

1. 8 and 35.6

2. 8 and 87

3. 8 and 53.5

4. 16 and 53.5

N2H4 + IO3-+ 2H + + Cl- ICl + N2 + 3H2O

N2Hऔर KIO3 के तुल्यांक द्रव्यमान क्रमशः हैं:-

(1) 35 और 35.6

(2) 87 और 87

(3) 53 और 53.5

(4) 16 और 53.5

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