p-Block Elements

Consider the following standard electrode potentials (E° in volts) in aqueous solution :

Element	$\ce{M^3+/M}$	$\ce{M+/M}$
Al	−1.66	+0.55
Tl	+1.26	−0.34

Based on these data, which of the following statements is correct ?

The number of S=O and S−OH bonds present in peroxodisulphuric acid and pyrosulphuric acid respectively are :

Which one of the following is an oxide ?

$\ce{XeF6}$ on partial hydrolysis with water produces a compound 'X'. The same compound 'X' is formed when $\ce{XeF6}$ reacts with silica. The compound 'X' is :

The number of P−OH bonds and the oxidation state of phosphorus atom in pyrophosphoric acid ($\ce{H4P2O7}$) respectively are :

The correct sequence of decreasing number of π-bonds in the structures of $\ce{H2SO3}$, $\ce{H2SO4}$ and $\ce{H2S2O7}$ is :

The increasing order of atomic radii of the following Group 13 elements is

The crystalline form of borax has

The compound(s) with TWO lone pairs of electrons on the central atom is(are)

The nitrogen containing compound produced in the reaction of $\ce{HNO3}$ with $\ce{P4O10}$

The reaction of zinc with dilute and concentrated nitric acid, respectively, produces :

The pair in which phosphorous atoms have a formal oxidation state of +3 is :

The non-metal that does not exhibit positive oxidation state is :

Match the items in Column I with its main use listed in Column II :

Column I	Column II
(A) Silica gel	(i) Transistor
(B) Silicon	(ii) Ion-exchanger
(C) Silicone	(iii) Drying agent
(D) Silicate	(iv) Sealant

Identify the reaction which does not liberate hydrogen :

Assertion : Among the carbon allotropes, diamond is an insulator, whereas, graphite is a good conductor of electricity.

Reason : Hybridization of carbon in diamond and graphite are $sp^3$ and $sp^2$, respectively.

Identify the incorrect statement :

The total number of lone pairs of electrons in $\ce{N2O3}$ is

Three moles of $\ce{B2H6}$ are completely reacted with methanol. The number of moles of boron containing product formed is

The correct statement(s) regarding, (i) HClO, (ii) $\ce{HClO2}$, (iii) $\ce{HClO3}$ and (iv) $\ce{HClO4}$, is(are)