471.

How many ions per molecule are produced in the solution, when Mohr salt is dissolved in excess of water?

• 4

• 5

• 6

• 10

The salt which responds to dilute and concentrated H₂SO₄ is

• CaF₂

• Ba(NO₃)₂

• Na₂SO₄

• Na₃PO₄

The aqueous solution of following salt will have the lowest pH

• NaClO₃

• NaClO

• NaClO₂

• NaClO₄

For one of the element various successive ionisation enthalpies (in kJ mol^-1) are given below.

	1st	2nd	3rd	4th	5th
IE	5775	1810	2750	11,580	14820

The element is

• Si

• P

• Al

• Mg

The property which is not true about fluorine is

• most of its reactions are exothermic

• it forms only one oxo acid

• highest electronegativity

• high F-Fbond dissociation enthalpy

Which is true regarding nitrogen?

• Less electronegative

• Has low ionisation enthalpy

• d-orbitals are available

• Ability to form $\mathrm{p\pi }-\mathrm{p\pi }$ bonds with itself

Which of the following compound of xenon has pyramidal geometry?

• XeOF₄

• XeF₂

• XeO₃

• XeF₄

Reactivity order of halides for dehydrohalogenation is

• R - F > R - Cl > R - Br > R - I

• R - I > R - Br > R - Cl > R - F

• R - I > R - Cl > R - Br > R - F

• R - F > R - I > R - Br > R - Cl

The correct order of ionization energy for comparing carbon, nitrogen and oxygen atoms is :

• C > N > O

• C > N < O

• C < N > O

• C < N < O

Which one of the following is expected to have largest size ?

• F^-

• O^2-

• Al³⁺

• N^3-