Monobasic and weak Bronsted acid

Monobasic and strong Lewis acid

Tribasic and weak Bronsted acid

Assertion A : SF 6 is highly stable Reason (R) : SF 6 is a gas The correct option among the following is

(A) is true, (R) is true but (R) is not the correct explanation for (A)

(A) is true, (R) is true and (R) is the correct explanation for (A)

The set of amphoteric oxides among the given oxides are Ga 2 O 3 , As 4 O 10 , Sb 4 O 10 , B 2 O 3 , Tl 2 O

Ga 2 O 3 , As 4 O 10 , Sb 4 O 10

Assertion (A) : The bond dissociation energy increases from F 2 to Cl 2 and then decreases to I 2 Reason (R) : The low bond energy of fluorine is due to the repulsion between the lone pairs of electrons in two fluorine atoms. The correct option among the following is

(A) is true, (R) is true and (R) is the correct explanation for (A)

(A) is true, (R) is true but (R) is not the correct explanation for (A)

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IMPORTANT

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Which of the following complex ions does not exist?

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Important Questions on p- Block Elements

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>TS EAMCET 2021 (04-Aug Shift-2)>Q 2

In the following reaction sequence, the compound

C

Al + N_{2} \overset{Δ}{⟶} (A) \overset{H_{2} O}{⟶} B (ppt) + C (g)

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>TS EAMCET 2020 (9-Sep Shift-1)>Q 3

H_{3} {BO}_{3}

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>TS EAMCET 2018 (04-May Shift-1)>Q 4

Identify the correct statements from the following:

(a) In Orthoboric acid, boron is in planar geometry.

(b) In ${BCl}_{3} \cdot {NH}_{3}$ , boron has tetrahedral geometry.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>TS EAMCET 2019 (03-May Shift-2)>Q 5

Which one among the following statements is correct about a solution of borax in water?

HARD

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>TS EAMCET - 5 August 2021 Shift 1>Q 6

Match the following.

	Column-1 Reaction		Column-2 Main product
A	$B_{2} H_{6} + 2 CO ⟶$	I	$B_{2} O_{3}$
B	$B_{2} H_{6} + 3 O_{2} ⟶$	II	$2 {BH}_{3} \cdot CO$
C	$B_{2} H_{6} + 6 H_{2} O ⟶$	III	$2 H_{3} {BO}_{3}$
		IV	$2 {BH}_{2} (CO)$
		V	$2 {HBO}_{2}$

The correct match is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>TS EAMCET 2021 (04-Aug Shift-1)>Q 7

Which of the following statements are correct?
a) The isotope of carbon containing

7

neutrons has natural abundance of

1.1 %

b) Among the IV A group elements, Sn has the lowest melting point
c) Silicon is the

2^{nd}

(by mass) most abundant element in the earth's crust
d) Elemental carbon shows the highest electrical resistivity among the

14

group elements

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>TS EAMCET 2019 (03-May Shift-2)>Q 8

Identify the correct statements from the following.

i) Quartz is a piezoelectric material
ii) All group $14$ tetrachlorides except ${CCl}_{4}$ are easily hydrolyzed in water.
iii) The $C - C$ bond distance within the layer of graphite is $154 pm$ .
iv) ${SiO}_{2}$ is soluble in aqueous $HCl$ solution.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - p- Block Elements>TS EAMCET 2018 (04-May Shift-1)>Q 9

Si

reacts with

{CH}_{3} Cl

573 K

in the presence of

Cu

powder to form methyl substituted chlorosilanes. Among the given methyl substituted chlorosilanes, whose yield is minimum?

Which of the following complex ions does not exist?

Important Questions on p- Block Elements

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