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

 67%
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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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Assertion : The ratio by volume of gaseous reactants and products is in agreement with their

                   molar ratio.

Reason : Volume of a gas is inversely proportional to the number of moles of a gas.

अभिकथन: गैसीय अभिकारकों और उत्पादों की आयतन के अनुपात में उनके मोलर अनुपात के साथ सहमति होती  है।

कारण: गैस का आयतन गैस के मोलों की संख्या के व्युत्क्रमानुपाती होता है।

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
 59%

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Amongst the following identify the species with an atom in (+6) oxidation state.

1. MnO4-

2. Cr(CN)3-6

3. NiF62-

4. CrO2Cl2

निम्नलिखित में से (+6) ऑक्सीकरण अवस्था वाले एक परमाणु की स्पीशीज की पहचान कीजिए।

1. MnO4-

2. Cr(CN)3-6

3. NiF62-

4. CrO2Cl2

 73%
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When NaCl is dissolved in water, the sodium ion becomes:

1. oxidised

2. reduced

3. hydrolysed

4. hydrated

जब NaCl जल में घुल जाता है, तो सोडियम आयन क्या हो जाता है?

(1) ऑक्सीकृत 

(2) अपचयित 

(3) जलअपघटित

(4) जलयोजित

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Which of the following is the strongest oxidising agent

(1) BrO3/Br2+,Eo=+1.50

(2) Fe3+/Fe2+,Eo=+0.76

(3) MnO4/Mn2+,Eo=+1.52

(4) Cr2O72/Cr3+,Eo=+1.33

निम्नलिखित में से कौन सबसे प्रबल ऑक्सीकारक है

(1) BrO3/Br2+,Eo=+1.50

(2) Fe3+/Fe2+,Eo=+0.76

(3) MnO4/Mn2+,Eo=+1.52

(4) Cr2O72/Cr3+,Eo=+1.33

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Which metal exhibits more than one oxidation states?

1. Na

2. Mg

3. Al

4. Fe

कौन सी धातु एक से अधिक ऑक्सीकरण अवस्थाओं को प्रदर्शित करती है?

(1) Na

(2) Mg

(3) Al

(4) Fe

 68%
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2MnO4-+5H2O2+6H+2 Z+5O2+8H2O. In this reaction Z is :

1. Mn2+

2. Mn4+

3. MnO2

4. Mn

2MnO4-+5H2O2+6H+2 Z+5O2+8H2O। इस अभिक्रिया में Z है:

1. Mn2+

2. Mn4+

3. MnO2

4. Mn

 64%
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3Cl2 + 6NaOH 5NaCl + NaClO3 + 3H2O, the equivalent weight of NaOH will be

1. 40

2. 48

3. 60

4. 80

3Cl2+ 6NOH5NaCl + NaClO3 + 3H2O, NaOH का तुल्यांकी भार होगा?

1. 40

2. 48

3. 60

4. 80

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The equivalent weight of H3PO2, when it disproportionates into PH3 and H3PO3 is 

1. 66

2. 49.5

3. 33

4. 20.5

H3PO2 का तुल्यांकी भार, जब यह PH3 और H3PO3 में असमानुपाती हो जाता है:

1. 66

2. 49.5

3. 33

4. 20.5

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