Al(s) + Cu2+(aq) \(\to\) Al3+(aq) + Cu(s)
2Al(s) + Cu2+(aq) \(\to\) 2Al(aq) + Cu(s)
2Al(s) + 3Cu2+(aq) \(\to\) 3Cu(s) + 2Al3+(aq)
3Al(s) + 2Cu2+(aq) \(\to\) Cu(s) + 3Al3+(aq)
Correct answer is C
Al(s) \(\to\) Al3+(aq) + 3e- ______(i)
Cu2+(aq) + 2e- \(\to\) Cu(s) ________(ii)
To balance the electrons, multiply equation (i) by 2 and equation (ii) by 3 and then add the resulting equations
2Al(s) \(\to\)2Al3+(aq) + 3e-
3cu2+(aq) + 6e- \(\to\)3Cu(s)
2Al(s) + 3Cu2+(aq) \(\to\) 3Cu(s) + 2Al3+(aq)
7
6
3
2
Correct answer is B
No explanation has been provided for this answer.
The oxidation number of sulphur is +4 in
Na2S>2O3
H2SO3
H2SO4
SO3
Correct answer is B
No explanation has been provided for this answer.
Which of the following substances is a non-electrolyte?
H2SO4
CH3COOH
C6H12O6
NH4Cl
Correct answer is C
No explanation has been provided for this answer.
Chlorine water is used as a bleaching agent because it is
An acidic solution
An alkaline solution
An oxidizing agent
A reducing agent
Correct answer is C
No explanation has been provided for this answer.