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1
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Which of the following products will be obtained when copper metal is reacted with $$\mathrm{HNO}_3$$ ?

A
$$\mathrm{NO}$$ and $$\mathrm{N}_2 \mathrm{O}_5$$
B
$$\mathrm{NO}$$ and $$\mathrm{NO}_2$$
C
$$\mathrm{NO}_2$$ and $$\mathrm{N}_2 \mathrm{O}_5$$
D
$$\mathrm{HNO}_2$$ and $$\mathrm{N}_2$$
2
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

A green yellow gas reacts with an alkali metal hydroxide to form a halate which can be used in fireworks and safety matches. The gas and halate are, respectively

A
$$\mathrm{Br}_2, \mathrm{KBrO}_3$$
B
$$\mathrm{Cl}_2, \mathrm{KClO}_3$$
C
$$\mathrm{I}_2, \mathrm{NaIO}_3$$
D
$$\mathrm{Cl}_2, \mathrm{NaClO}_3$$
3
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Assertion (A) $$\mathrm{N}_2$$ is less reactive than $$\mathrm{P}_4$$.

Reason (R) Nitrogen has more electron gain enthalpy than phosphorus.

A
Both (A) and (R) are true and (R) is the correct explanation of (A).
B
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
C
(A) is true and (R) is false.
D
Both (A) and (R) are false.
4
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Assertion (A) $$\mathrm{NaCl}$$ reacts with concentrated $$\mathrm{H}_2 \mathrm{SO}_4$$ to give colourless fumes with pungent smell. But on adding $$\mathrm{MnO}_2$$ the fumes become greenish yellow.

Reason (R) $$\mathrm{MnO}_2$$ oxidises $$\mathrm{HCl}$$ to chlorine gas which is greenish yellow.

A
Both (A) and (R) are true and (R) is the correct explanation of (A).
B
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
C
(A) is true and (R) is false.
D
Both (A) and (R) are false.
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