Question 1: Palette 1/7

AIIMS 2019 MCQ

Correct order of bond dissociation energy

A

Br$_2$ > Cl$_2$

B

F$_2$ > Cl$_2$

C

I$_2$ > F$_2$

D

F$_2$ > I$_2$

Question 2: Palette 2/7

AIIMS 2019 MCQ

Which have melting point below $500^{\circ} \mathrm{C}$ ?

A

Ag, Cu

B

Zn, Cd

C

Cd, Cu

D

Ag, Zn

Question 3: Palette 3/7

AIIMS 2019 MCQ

Which has least covalent radius?

A

Mn

B

Cu

C

Zn

D

Ni

Question 4: Palette 4/7

AIIMS 2019 MCQ

Which pair of elements has maximum electronegativity difference?

A

Li and F

B

Na and F

C

Na and Br

D

Na and Cl

Question 5: Palette 5/7

AIIMS 2018 MCQ

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)

Question 6: Palette 6/7

AIIMS 2018 MCQ

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

$2.63 \mathop A\limits^o$

Question 7: Palette 7/7

AIIMS 2018 MCQ

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.