The P-Block Elements Quiz-1

Question 1

$H_3BO_3$ is

Accepted Answer

monobasic acid and weak lewis acid

Answer

monobasic and weak bronsted acid

Answer

monobasic and strong Lewis acid

Answer

tribasic and weak Bronsted acid

Question 2

$(Me)_2SiCI_2$ on hydrolysis will produce

Accepted Answer

$[-O- (Me)_2Si-O-]_n$

Answer

$(Me)_2Si(OH)_2$

Answer

$(Me)_2Si = 0$

Answer

$Me_2SiCl(OH)$

Question 3

Name of the structure of silicates in which three oxygen atoms of $[SiO_4]^{4-}$are shared is

Accepted Answer

sheet silicate

Answer

pyrosilicate

Answer

linear chain silicate

Answer

three dimensional silicate

Question 4

$B(OH)_3 + NaOH\rightleftharpoons NaBO_2 + Na[B(OH)_4 ] + H_2O $ How can this reaction be made to proceed in forward direction?

Accepted Answer

Addition of cis 1, 2 diol

Answer

Addition of borax

Answer

Addition of trans 1, 2 diol

Answer

Addition of $Na_2HPO_4$

Question 5

The product/s formed when diborane is hydrolysed is/are

Accepted Answer

$H_3BO_3\text{ and }H_2$

Answer

$B_2O_3\text{ and }H_3BO_3$

Answer

$B_2O_3\text{ only}$

Answer

$H_3BO_3\text{ only}$

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