P block elements

Presence of ozone can be detected by

• FeS

• CuS

• PbS

• none of these

The strongest acid

• HI

• HCl

• HF

• HBr

Nitrogen is chemically inert. Why?

• Due to presence of double bond require more energy to break

• Due to presence of triple bond require more energy to break

• Triple bond requires less energy to break

• None of the above

5.The shape of I F ₇

• T shape

• trigonal bipyramidal

• linear

• pentagonal bipyramidal

Pick out the correct statement

• Chlorine water on standing loses its yellow colour due to the formation of HBr

• Bleaching property of chlorine is due to the formation of nascent oxygen

• Chlorine converts SO2 to SO3

• The bleaching effect of chlorine is temporary.

In the interhalogen compound XX', which among the following statement is correct

• X is larger halogen, X' is smaller halogen

• X is smaller halogen, X' is larger halogen

• Both X and X' are of the same size

• Size of X and X' doesn't matter

A brown ring is formed in the ring test for NO₃^– ion. It is due to the formation of

• [Fe(H₂O)₅ (NO)]²⁺

• FeSO₄.NO₂

• [Fe(H₂O)₄(NO)₂]²⁺

• FeSO₄.HNO₃

SF₆ is known but SCl₆ is not________

• Due to small size of fluorine six F ^– ion can be accomodated around sulphur whereas chloride ion is comparatively larger in size, therefore, there will be interionic repulsion

• Due to absence of vacant d orbital

• Chlorine have more electron gain enthalpy than

• none of these

Assertion : N₂ is less reactive than P₄.

Reason : Nitrogen has more electron gain enthalpy than phosphorus

• Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.

• Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.

• Assertion is correct, but reason is wrong statement.

• Assertion is wrong but reason is correct statement.

• Both assertion and reason are wrong statement

Which of the following options are not in accordance with the property

mentioned against them?

• (i) F₂ > Cl₂ > Br₂ > I₂ Oxidising power.

• (ii) MI < MBr < MCl < MF Ionic character of metal halide.

• (iii) F₂ > Cl₂ > Br₂ > I₂ Bond dissociation enthalpy.

• (iv) HI < HBr < HCl < HF Bond dissociation enthalpy.