JEE Main 2024 (Online) 5th April Morning Shift | p-Block Elements Question 13 | Chemistry

The number of neutrons present in the more abundant isotope of boron is '$$x$$'. Amorphous boron upon heating with air forms a product, in which the oxidation state of boron is '$$y$$'. The value of $$x+y$$ is _________ .

JEE Main 2024 (Online) 1st February Evening Shift

MCQ (Single Correct Answer)

-1

Given below are two statements :

Statement (I) : $\mathrm{SiO}_2$ and $\mathrm{GeO}_2$ are acidic while $\mathrm{SnO}$ and $\mathrm{PbO}$ are amphoteric in nature.

Statement (II) : Allotropic forms of carbon are due to property of catenation and $\mathrm{p} \pi-\mathrm{d} \pi$ bond formation.

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

Statement I is false but Statement II is true

Both Statement I and Statement II are false

Both Statement I and Statement II are true

Statement I is true but Statement II is false

JEE Main 2024 (Online) 1st February Evening Shift

MCQ (Single Correct Answer)

-1

The strongest reducing agent among the following is :

$\mathrm{SbH}_3$

$\mathrm{NH}_3$

$\mathrm{BiH}_3$

$\mathrm{PH}_3$

JEE Main 2024 (Online) 31st January Evening Shift

MCQ (Single Correct Answer)

-1

Given below are two statements:

Statement I : Group 13 trivalent halides get easily hydrolyzed by water due to their covalent nature.

Statement II : $$\mathrm{AlCl}_3$$ upon hydrolysis in acidified aqueous solution forms octahedral $$\left[\mathrm{Al}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$$ ion.

In the light of the above statements, choose the correct answer from the options given below :

Statement I is false but statement II is true

Both statement I and statement II are true

Both statement I and statement II are false

Statement I is true but statement II is false

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