NEET Practice Questions - Chemistry - The p-Block Elements (XII)

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    The p-Block Elements (XII)

Which of the following on heating produces NO2?

(1) NaNO3

(2) AgNO3

(3) NH4NO3

(4) NH4NO2

The dissolution of Al(OH)3 by a solution of NaOH results in the formation of:

(1) [Al(H2O)4(OH)2]+

(2) [Al(H2O)3(OH)3]

(3) [Al(H2O)2(OH)4]-

(4) [Al(H2O)6(OH)3]

The formation of PH+4 is difficult compared to NH+4 because

(1) lone pair of phosphorous is optically inert

(2) lone pair of phosphorous resides in almost pure p- orbital

(3) lone pair of phosphorous resides at sp3 orbital

(4) lone pair of phosphorous resides in almost pure s- orbital

Concentrated nitric acid reacts with iodine to give:

(1) HOI

(2) HI

(3) HOIO2

(4) HOIO3

Hydrolysis of one mole of peroxodi-sulphuric acid produces:

(1) two moles of sulphuric acid

(2) two moles of peroxomono-sulphuric acid

(3) one mole of sulphuric acid, one mole of peroxomono-sulphuric acid

(4) one mole of sulphuric acid, one mole of peroxomono-sulphuric acid and one mole of hydrogen peroxide

Anhydrous aluminium chloride (Al2Cl6) is covalent compound and soluble in water giving:

(a)Al3+ and Clions

(b)[Al(H2O)6]3+ and  Clions

(c)[AlCl2 (H2O)4]+ and [AlCl(H2O)2]- ions

Which of the following is the correct statement?

(1) F2 has higher dissociation energy than Cl2

(2) F has higher electron affinity than Cl

(3) HF is stronger acid than HCl

(4) Boiling point increases down the group in halogens

Incorrectly matched characteristic is:

(a) S8: covalent lattice

(b) P4: tetrahedron

(c) S42-: zigzag

(d) SiO2: Covalent lattice

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

(1) (NH4)2Cr2O7

(2) NH4Cl+NaNO2

(3) NH4Cl+CaO

(4) Ba(N3)2

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

(1) H4P2O5

(2) H4P2O7

(3) H4P2O6

(4) None