EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2021 (19-Aug Afternoon)>Q 3

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Earn 100

Assertion $(A) :$ The colour of old lead paintings can be restored by washing them with a dilute solution of $H_{2} O_{2}$ .
Reason $(R) :$ Hydrogen peroxide reduces $PbS$ to $Pb$

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Important Questions on p- Block Elements

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET - 20 Aug 2021 Forenoon>Q 4

What would be the product of following reaction

{SiCl}_{4} \overset{Excess of H_{2} O}{⟶}

? (Major Product)

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2019 (21-Apr Shift-2)>Q 5

Identify the correct statements

I)

Germanium exists only in traces.

II)

The order of electronegativity of

Si, Ge, Sn

is

Sn > Ge > Si

III)

All group

14

elements are available in solid state

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET - 20 Aug 2021 Afternoon>Q 6

H_{3} {BO}_{3}

or

B (OH)_{3}

is considered as an acid because its molecule

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2020 (Sep-23 Shift-1)>Q 7

Which of the following represents the structure of inorganic benzene?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2019 (21-Apr Shift-2)>Q 8

Which of the following reactions can be used to prepare diborane?

$I)^{} {BF}_{3} + LiAl H_{4} \overset{ether}{\to}$

$II)$ ${BF}_{3} + NaH \overset{450 K}{⟶}$
$III) {Na}_{2} B_{4} O_{7} + H_{2} O ⟶$
$IV) {NaBH}_{4} + I_{2} ⟶$

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2018 (25-APR Shift-1)>Q 9

In the structure of

B_{2} H_{6}

, the number of

{BH}_{2}

groups present in one plane, and the number of

B - H

bonds,

B - B

bonds,

B - H - B

bridge bonds are respectively

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2021 (19-Aug Forenoon)>Q 10

When borax is dissolved in water, it gives an alkaline solution. The alkaline solution consists the following products

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - p- Block Elements>AP EAPCET 2021 (19-Aug Afternoon)>Q 11

The structure of diborane $B_{2} H_{6}$ is given below. Identify the bond angles $x, y .$ In diborane, which bonds are commonly known as banana-bonds

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