JEE Main 2023 (Online) 1st February Evening Shift | p-Block Elements Question 51 | Chemistry

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JEE Main 2023 (Online) 1st February Evening Shift

MCQ (Single Correct Answer)

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For electron gain enthalpies of the elements denoted as $$\Delta_{\mathrm{eg}} \mathrm{H}$$, the incorrect option is :

$$\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{I})<\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{At})$$

$$\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{Te})<\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{Po})$$

$$\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{Cl})<\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{F})$$

$$\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{Se})<\Delta_{\mathrm{eg}} \mathrm{H}(\mathrm{S})$$

JEE Main 2023 (Online) 1st February Morning Shift

MCQ (Single Correct Answer)

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Out of Syllabus

Given below are two statements:

Statement I : Chlorine can easily combine with oxygen to form 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 :

Statement I is true but Statement II is false

Both the Statements I and II are false

Statement I is false but Statement II is true

Both the Statements I and II are true

JEE Main 2023 (Online) 31st January Evening Shift

MCQ (Single Correct Answer)

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Out of Syllabus

The Lewis acid character of boron tri halides follows the order :

$\mathrm{BI}_{3}>\mathrm{BBr}_{3}>\mathrm{BCl}_{3}>\mathrm{BF}_{3}$

$\mathrm{BCl}_{3}>\mathrm{BF}_{3}>\mathrm{BBr}_{3}>\mathrm{BI}_{3}$

$\mathrm{BF}_{3}>\mathrm{BCl}_{3}>\mathrm{BBr}_{3}>\mathrm{BI}_{3}$

$\mathrm{BBr}_{3}>\mathrm{BI}_{3}>\mathrm{BCl}_{3}>\mathrm{BF}_{3}$

JEE Main 2023 (Online) 31st January Evening Shift

MCQ (Single Correct Answer)

-1

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 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

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