1
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Assertion (A) Alkali metals and their salts impart characteristic flame colours.

Reason (R) Alkali metals have low ionisation enthalpy values. So, electron excitation is possible. The correct option among the following is

A

(A) and (R) are true, (R) is the correct explanation of (A).

B

(A) and (R) are true, but (R) is not the correct explanation of (A).

C

(A) is true but (R) is false.

D

(A) is false but (R) is true.

2
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

When compared with alkaline earth metals, the alkali metals have

A

greater hardness

B

higher boiling points

C

smaller ionic radii

D

lower ionisation enthalpy

3
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Kernite and cryolite are the minerals of two elements $X$ and $Z$. Respectively $X$ and $Z$ are

A

$\mathrm{B}, \mathrm{Ga}$

B

$\mathrm{B}, \mathrm{Al}$

C

AI, In

D

$\mathrm{B}, \mathrm{TI}$

4
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Choose the correct statement from the following with reference to inert pair effect.

A

$\mathrm{Sn}^{+4}$ is reducing agent but $\mathrm{Pb}^{+4}$ is an oxidising agent.

B

$\mathrm{Sn}^{+4}$ is an oxidising agent but $\mathrm{Pb}^{+2}$ is a reducing agent.

C

$\mathrm{Sn}^{+2}$ is reducing agent but $\mathrm{Pb}^{+4}$ is an oxidising agent.

D

$\mathrm{Sn}^{+2}$ is an oxidising agent but $\mathrm{Pb}^{+4}$ is reducing agent.

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