1
TS EAMCET 2022 (Online) 19th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the uncertainty in velocity is $\frac{1}{2 m} \sqrt{\frac{h}{\pi}}$, then the ratio of uncertainty in position and momentum is

A

$10: 1$

B

$100: 1$

C

$1: 1$

D

$0.5: 1$

2
TS EAMCET 2022 (Online) 19th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

The valency shell electronic configuration of Cr and Cu atoms, respectively, are

A

$3 d^4 4 s^2 ; 3 d^{10} 4 s^1$

B

$3 d^5 4 s^1 ; 3 d^{10} 4 s^1$

C

$3 d^5 4 s^1 ; 3 d^9 4 s^2$

D

$3 d^4 4 s^2 ; 3 d^9 4 s^2$

3
TS EAMCET 2022 (Online) 19th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify all the correct statements for lanthanoide contraction.

(A) The covalent properties of the lanthanoide metal hydroxides increases from La to Lu.

(B) The chemical reactivity decreases from La to Lu.

(C) $\mathrm{La}(\mathrm{OH})_3$ is more basic than $\mathrm{Lu}(\mathrm{OH})_3$.

(D) Zr and Hf have about the same radius.

(E) Separation of lanthanoides from one another is easy.

A

A, B, C, E only

B

A, B, C, D only

C

A, B, C only

D

B, C, D only

4
TS EAMCET 2022 (Online) 19th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

The correct order of the electron gain enthalpy of the given elements is

A

$\mathrm{O}>\mathrm{Se}>\mathrm{S}$

B

$\mathrm{Se}>\mathrm{S}>\mathrm{O}$

C

$\mathrm{O}>\mathrm{S}>\mathrm{Se}$

D

$\mathrm{S}>\mathrm{O}>\mathrm{Se}$

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