The correct order of bond enthalpy ( kJ mol – 1 ) is:

C - C > Si - Si > Ge - Ge > Sn - Sn

Si - Si > C - C > Sn - Sn > Ge - Ge

Si - Si > C - C > Ge - Ge > Sn - Sn

C - C > Si - Si > Sn - Sn > Ge - Ge

Given below are two statements: Statement I: Chlorine can easily combine with oxygen to from oxides: and the product has a tendency to explode. Statement II: Chemical reactivity of an element can be determined by its reaction with oxygen and halogens. In the light of the above statements, choose the correct answer from the options given below

Both the statements I and II are true

Statement I is true but Statement II is false

Statement I is false but Statement II is true

Both the Statements I and II are false

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Amongst He , Ne , Ar and Kr ; 1 g of activated charcoal adsorbs more of Kr . Reason R: The critical volume V c ( cm 3 mol – 1 ) and critical pressure P c (atm) is highest for Krypton but the compressibility factor at critical point Z c is lowest for Krypton. In the light of the above statements, choose the correct answer from the options given below.

Both A and R are true but R is NOT the correct explanation of A

Both A and R are true and R is the correct explanation A

Given below are two statements : Statement I : Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green. Statement II : The green colour observed is due to the formation of copper(I) metaborate In the light of the above statements, choose the most appropriate answer from the options given below:

Both Statement I and Statement II are false

Both Statement I and Statement II are true

Statement I is false but Statement II is true

Statement I is true but Statement II is false

Boric acid in solid, whereas BF 3 is gas at room temperature because of

Strong hydrogen bond in Boric acid

Strong ionic bond in Boric acid

Strong van der Waal's interaction in Boric acid

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 18 - The p-Block Elements>JEE Main - 25 Feb 2021 Shift 1>Q 67

EASY

JEE Main

IMPORTANT

Earn 100

The incorrect statement about $B_{2} H_{6}$ is :

50% studentsanswered this correctly

Important Questions on The p-Block Elements

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 18 - The p-Block Elements>JEE Main - 25 Feb 2021 Shift 1>Q 68

Among the following, the number of halide(s) which is/ are inert to hydrolysis is

(A) ${BF}_{3}$
(B) ${SiCl}_{4}$
(C) ${PCl}_{5}$
(D) ${SF}_{6}$

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 18 - The p-Block Elements>JEE Main - 24 Feb 2021 Shift 2>Q 69

Among the following allotropic forms of sulphur, the number of allotropic forms, which will show paramagnetism is _______.
(A)

α

-sulphur
(B)

β

-sulphur
(C)

S_{2}

-form

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 18 - The p-Block Elements>JEE Main - 24 Feb 2021 Shift 1>Q 70

Given below are two statements:
Statement $I :$ Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.

Statement $II :$ Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.

In the light of the above statements, choose the most appropriate answer from the options given below.

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 18 - The p-Block Elements>JEE Main - 22 July 2021 Shift 1>Q 71

Given below are the statements about diborane
(a) Diborane is prepared by the oxidation of ${NaBH}_{4}$ with $I_{2}$
(b) Each boron atom is in ${sp}^{2}$ hybridized state
(c) Diborane has one bridged $3$ centre- $2$ -electron bond
(d) Diborane is a planar molecule