Only iodine forms hepta-fluoride IF7, but chlorine and bromine give Penta-fluorides. The reason for this is :

  • low electron affinity of iodine

  • unusual pentagonal bipyramidal structure of IF7

  • that the larger iodine atom can accommodate more number of smaller fluorine atom around it 

  • the low chemical reactivity of IF7

Chloride of an  element A gave a neutral solution in water. In the periodic table the element A belongs to

  • First group

  • Third group

  • Fifth group

  • Transitional metal

The correct relationship between the pH of isomolar solutions of sodium oxide(pH1), sodium sulphide (pH2), sodium selenide (pH3) and sodium telluride (pH4) is -

  •  pH1 > pH2 ≈ pH3 > pH4

  •  pH1 < pH2 < pH3 < pH4

  •  pH1 < pH2 < pH3 ≈ pH4

  •  pH1 > pH2 > pH3 > pH4

NO2 can be produced by heating -

  • NaNO3

  • AgNO3

  • NH4NO3

  • NH4NO2

The formation of PH4+ is difficult as compared to NH4+ 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

  • S52-: zigzag

  • SiO2: Covalent lattice

 N2 cannot be produced by heating -

  • (NH4)2Cr2O7

  • NH4Cl+NaNO2

  • NH4Cl+CaO

  • Ba(N3)2

 An oxyacid among the following that contains both P-H and P-P bond simultaneously is -

  • H4P2O5

  • H4P2O7

  • H4P2O6

  • None of the above

The reaction among the following that indicated oxidation of nitrogen is -

  • N2 →2NH3

  • N2O4  →2NO2

  • NO3- → N2O5

  • NO2-  →NO3-

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 the above 

An oxyacid of phosphorous is obtained on hydrolysis of PCl3.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

A compound among the following having S-S bond is -

  • H2S2O7

  • H2SO5

  • H2S2O8

  • H2S2O6

Bleaching action of SO2 is due to its-

  • Acidic property

  • Basic property

  • Reducing property

  • Oxidising property

Which is not hydrolysed with water?

  • PCl3

  • NF3

  • NCl3

  • BCl3

The following solid exists in the form of ions:-

  • BI3

  • BCl3

  • BF3

  • CaBO2

Which of the following is not hydrolysed?

  • CCl4

  • SiCl4

  • GeCl4

  • SnCl4

The correct order of boiling point of group 16 hydrides is - 

  • H2O<H2S<H2Se<H2Te

  • H2Te<H2Se<H2S<H2O

  • H2S<H2Se<H2Te<H2O

  • H2O<H2Te<H2Se<H2S

Ammonia on reaction with excess of chlorine gives

  • NCl3 and HCl

  • N2 and NH4Cl

  • NCl3 and NH4Cl

  • N2 and HCl

White phosphorous reacts with calcium to form a certain compound which on hydrolysis produces

  • PH3

  • H3PO4

  • P4O6

  • P4O10

Which of the following pairs of molecules have the almost identical bond dissociation energy?

  • F2 and H2

  • N2 and CO

  • F2 and I2

  • HF and O2

Nitrogen gas is liberated by thermal decomposition of :

  •  NH4NO2                                 

  •  NaN3

  •  NH42Cr2O7                           

  • All    

The van der Waals forces are greatest in

  • Neon

  • Argon

  • Krypton

  • Xenon

Match the interhalogen compounds of Column I with the geometry in Column II and assign the correct code.

Column I             Column II
A. XX'                 (i) T-shape
B. XX'3               (ii) Pentagonal bipyramidal
C. XX'5               (iii) Linear
D. XX'7                (iv) Square-pyramidal
                           (v) Tetrahedral

The correct match among the following is -
       A   B    C    D

  •    (iii) (iv) (i) (ii)

  •    (iii) (i) (iv) (ii)

  •    (v) (iv) (iii) (ii)

  •    (iv) (iii) (ii) (i)

In which pair of ions both the species contain S-S bond?

(a) S2O72-, S2O32-(b) S4O62-, S2O32-(c) S2O72-, S2O82-(d) S4O62-, S2O72-
  • 1
  • 2
  • 3
  • 4

AlF3 is soluble in HF only in presence of KF. It is due to the formation of

  • K3[AIF3H3]

  • K3[AIF6]

  • AlH3

  • K[AIF3H]

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