1
KCET 2020
MCQ (Single Correct Answer)
+1
-0

The oxidation number of nitrogen atoms in $$\mathrm{NH}_4 \mathrm{NO}_3$$ are

A
$$+5,+5$$
B
$$-3,+5$$
C
$$+3,-5$$
D
$$-3,-3$$
2
KCET 2020
MCQ (Single Correct Answer)
+1
-0

In which of the following cases a chemical reaction is possible?

A
$$\mathrm{ZnSO}_4(a q)$$ is placed in a copper vessel
B
$$\mathrm{AgNO}_3$$ solution is stirred with a copper spoon
C
Conc. $$\mathrm{HNO}_3$$ is stored in a platinum vessel
D
gold ornaments are washed with dil. $$\mathrm{HCl}$$
3
KCET 2019
MCQ (Single Correct Answer)
+1
-0

The number of moles of electron required to reduce 0.2 mole of $$\mathrm{Cr}_2 \mathrm{O}_7^{-2}$$ to $$\mathrm{Cr}^{+3}$$ is

A
1.2
B
6
C
12
D
0.6
4
KCET 2019
MCQ (Single Correct Answer)
+1
-0

Which of the following statement is correct?

A
$$\mathrm{Cl}_2$$ oxidises $$\mathrm{H}_2 \mathrm{O}$$ to $$\mathrm{O}_2$$ but $$\mathrm{F}_2$$ does not
B
$$\mathrm{Cl}_2$$ is a stronger oxidising agent than $$\mathrm{F}_2$$
C
$$\mathrm{F}_2$$ oxidises $$\mathrm{H}_2 \mathrm{O}$$ to $$\mathrm{O}_2$$ but $$\mathrm{Cl}_2$$ does not
D
Fluoride is a good oxidising agent
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