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

In which of the following arrangements, the order is not strictly according to the property written against it?

A
$$\mathrm{CO}_2<\mathrm{SiO}_2<\mathrm{SnO}_2<\mathrm{PbO}_2$$ (oxidising power)
B
$$\mathrm{HF}^2<\mathrm{HCl}<\mathrm{HBr}<\mathrm{HI}$$ (acidic strength)
C
$$\mathrm{NH}_3>\mathrm{PH}_3<\mathrm{AsH}_3<\mathrm{SbH}_3$$ (basic strength)
D
$$\mathrm{B}<\mathrm{C}<\mathrm{O}<\mathrm{N}$$ (first ionisation enthalpy)
2
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

The ionic radii $$(\mathop A\limits^o)$$ of $$\mathrm{C}^{4-}$$ and $$\mathrm{O}^{2-}$$ respectively are 2.60 and 1.40. The ionic radius of the isoelectronic ion $$\mathrm{N}^{3-}$$ would be

A
$$1.31 \mathop A\limits^o$$
B
$$2.83 \mathop A\limits^o$$
C
$$1.71 \mathop A\limits^o$$
D
$$2.63 \mathop A\limits^o$$
3
AIIMS 2018
MCQ (Single Correct Answer)
+1
-0.33

Assertion (A) Electron gain enthalpy becomes less negative as we go down a group.

Reason (R) Size of the atom increases on going down the group and the added electron would be farther away from the nucleus.

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.
AIIMS Subjects
EXAM MAP