1
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
What is the change in oxidation number of carbon in the following reaction?
CH4(g) + 4Cl2(g) $$ \to $$ CCl4(l) + 4HCl(g)
A
0 to + 4
B
$$ - $$4 to + 4
C
0 to $$ - $$ 4
D
+ 4 to + 4
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Which of the following reactions are disproportionation reaction?

(a) 2Cu+ $$ \to $$ Cu2+ + Cu0
(b) 3MnO42+ + 4H+ $$ \to $$ 2MnO4- + MnO2 + 2H2O
(c) 2KMnO4 $$\buildrel \Delta \over \longrightarrow $$ K2MnO4 + MnO2 + O2
(d) 2MnO4- + 3Mn2+ + 2H2O $$ \to $$ 5MnO2 + 4$${H^ \oplus }$$

Select the correct option from the following :
A
(a), (c) and (d)
B
(a) and (b) only
C
(a) and (d) only
D
(a), (b) and (c)
3
NEET 2018
MCQ (Single Correct Answer)
+4
-1
For the redox reaction,
MnO4 + C2O4 2– + H+ $$ \to $$ Mn2+ + CO2 + H2O
The correct coefficients of the reactants for the balanced equation are
A
MnO4- C2O42- H+
16 5 2
B
MnO4- C2O42- H+
2 5 16
C
MnO4- C2O42- H+
2 16 5
D
MnO4- C2O42- H+
5 16 2
4
NEET 2018
MCQ (Single Correct Answer)
+4
-1
The correct order of N-compounds in its decreasing order of oxidation states is
A
HNO3 , NO, N2 , NH4Cl
B
HNO3 , NO, NH4Cl, N2
C
HNO3 , NH4Cl, NO, N
D
NH4Cl, N2 , NO, HNO3
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Class 12