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

229, $\mathrm{At} T(\mathrm{~K}), K_C$ value for the reaction, $\frac{1}{3} \mathrm{~N}_2(g)+\mathrm{H}_2(g) \rightleftharpoons \frac{2}{3} \mathrm{NH}_3(g)$ is 50 . The $K_C$ value for the reaction, $2 \mathrm{NH}_3(g) \rightleftharpoons \mathrm{N}_2(g)+3 \mathrm{H}_2(g)$ at the same temperature is

A

$4 \times 10^{-6}$

B

$8 \times 10^{-6}$

C

$6 \times 10^{-6}$

D

$8 \times 10^{-3}$

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

Identify the correct statements from the following.

A. In photosynthesis reaction, water is oxidised to oxygen.

B. An example for interstitial hydride is $\mathrm{MgH}_2$.

C. Sodium hexametaphosphate is used in the removal of permanent hardness of water.

A

$A, B, C$

B

A and B only

C

B and C only

D

A and C only

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

Which one of the following statements is not correct?

A

Molecular formula of calgon is $\mathrm{NaAlSiO}_4$.

B

Beryllium halides are soluble in organic solvents.

C

Among alkali metals, the reducing property of sodium is least in aqueous solution.

D

White metal is an alloy of lithium.

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

Thermal decomposition of lithium nitrate gives

A

$\mathrm{LiO}_2, \mathrm{O}_2, \mathrm{NO}_2$

B

$\mathrm{Li}_2 \mathrm{O}, \mathrm{O}_2, \mathrm{~N}_2 \mathrm{O}$

C

$\mathrm{Li}_2 \mathrm{O}, \mathrm{O}_2, \mathrm{~N}_2$

D

$\mathrm{Li}_2 \mathrm{O}, \mathrm{O}_2, \mathrm{NO}_2$

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