NEET Questions - Chemistry - P block elements

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The species that does not contain peroxide ions is:

PbO₂
H₂O₂
SrO₂
BaO₂

The formation of ${PH}_{4}^{+}$ is difficult compared to ${NH}_{4}^{+}$ because

lone pair of phosphorous is optically inert
lone pair of phosphorous resides in almost pure p- orbital
lone pair of phosphorous resides at sp³ orbital
lone pair of phosphorous resides in almost pure s- orbital

Concentrated nitric acid reacts with iodine to give:

HOI
HI
HIO₃
HIO4

Partial Hydrolysis of one mole of peroxodi-sulphuric acid produces:

two moles of sulphuric acid
two moles of peroxomono-sulphuric acid
one mole of sulphuric acid, one mole of peroxomono-sulphuric acid
one mole of sulphuric acid, one mole of peroxomono-sulphuric acid and one mole of hydrogen peroxide

Which of the following is the correct statement?

F₂ has higher dissociation energy than Cl₂
F has higher electron affinity than Cl
HF is stronger acid than HCl
Boiling point increases down the group in halogens

Incorrectly matched characteristic is:

S₈: covalent lattice
P₄: tetrahedron
S₅^2-: zigzag
SiO₂: Covalent lattice

Among the following compounds, which on heating do not produce N₂?

(NH₄)₂Cr₂O₇
NH₄Cl+NaNO₂
NH₄Cl+CaO
Ba(N₃)₂

Which of the following oxyacid contains both P-H and P-P bond simultaneously?

H₄P₂O₅
H₄P₂O₇
H₄P₂O₆
None

In which process does the nitrogen undergo oxidation?

N₂ ^_$\to$2NH₃
N₂O₄ ^_$\to$2NO₂
NO3^- _$\to$N₂O₅
NO₂^{- _$\to$}NO₃^-

B(OH)₃+ NaOH $\to$ NaBO₂+ Na[B(OH)₄] +H₂O

How can this reaction is made to proceed in forward direction?

addition of cis 1,2 diol
addition of borax
addition of trans 1,2 diol
addition of Na₂HPO₄

Which of the following has been arranged in order of decreasing bond dissociation energy:

P-O>Cl-O>S-O
P-O>S-O>Cl-O
S-O>Cl-O>P-O
Cl-O>S-O>P-O

NO₂ is the anhydride of

HNO₃
HNO₂
HNO₃+HNO₂
None of these

When PCl₃ is hydrolysed then oxyacid of phosphrous is obtained.The basicity of oxyacid is

one
two
three
four

Which set of oxide of nitrogen is paramagnetic in nature?

NO, N₂O
NO₂, NO, N₂O
NO,NO₂
N₂O,NO₂

S-S bond is present in

H₂S₂O₇
H₂SO₅
H₂S₂O₈
H₂S₂O₆

NEET Chemistry Questions: P block elements - XII