1
TS EAMCET 2023 (Online) 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the incorrect reaction from the following.

A

$2 \mathrm{NaNO}_3 \longrightarrow 2 \mathrm{NaNO}_2+\mathrm{O}_2$

B

$2 \mathrm{LiNO}_3 \longrightarrow 2 \mathrm{LiNO}_2+\mathrm{O}_2$

C

$2 \mathrm{~Pb}\left(\mathrm{NO}_3\right)_2 \longrightarrow 2 \mathrm{PbO}+4 \mathrm{NO}_2+\mathrm{O}_2$

D

$\mathrm{Mg}_2 \mathrm{C}_3+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{CH}_3 \mathrm{C} \equiv \mathrm{CH}+\mathrm{Mg}(\mathrm{OH})_2$

2
TS EAMCET 2023 (Online) 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In the reaction I and II the covalencies of Be and Al in $X$ and $Y$ are respectively

I. $\mathrm{Be}(\mathrm{OH})_2+\underset{\text { (Excess) }}{\mathrm{NaOH}} \longrightarrow X$

II. $\mathrm{Al}(\mathrm{OH})_3+\underset{\text { (Excess) }}{\mathrm{NaOH}} \longrightarrow Y$

A

4,6

B

4,4

C

6, 4

D

3,6

3
TS EAMCET 2023 (Online) 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Tha atomic radius of gallium is less than that of aluminium. This is due to

A

greater shielding power of s-electrons of gallium atom.

B

poor shielding power of s-electrons of gallium.

C

poor shielding power of $d$-electrons of gallium.

D

greater shielding power of $d$-electrons of gallium.

4
TS EAMCET 2023 (Online) 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following has lowest melting point?

A

Si

B

Ge

C

Sn

D

Pb

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