1
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. $$\mathrm{HCl}$$
2
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
3
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
4
KCET 2019
MCQ (Single Correct Answer)
+1
-0

In the reaction of gold with aquaregia, oxidation state of nitrogen changes from

A
+4 to +2
B
+6 to +4
C
+5 to +2
D
+3 to +1
KCET Subjects
EXAM MAP