The change in oxidation number of chlorine when Cl2 gas reacts with hot and concentrated sodium hydroxide solution is:

1. Zero to +1 and Zero to –5

2. Zero to –1 and Zero to +5

3. Zero to –1 and Zero to +3

4. Zero to +1 and Zero to –3

Subtopic:  Balancing of Equations |
 68%
Level 2: 60%+
AIPMT - 2012
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Number of moles of \(MnO^-_4\) required to oxidise one mole of ferrous oxalate completely in an acidic medium will be:

1. 0.6 mole 2. 0.4 mole
3. 7.5 moles 4. 0.2 mole
Subtopic:  Balancing of Equations |
 57%
Level 3: 35%-60%
AIPMT - 2008
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a Zn + b NO3- + cH+ → d NH4+ + e H2O + f Zn+2 
In the reaction given above, the correct values of a, b, c, d, e, and f respectively are: 
a b c d e f
1. 2 4 6 8 4 2
2. 1 4 10 3 1 4
3. 4 1 10 1 3 4
4. 10 4 1 3 4 2
Subtopic:  Balancing of Equations |
 74%
Level 2: 60%+
AIPMT - 1999
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