Which of the following is the correct order of the size of iodine species?

• I > I^- > I⁺

• I^- > I > I⁺

• I⁺ > I > I^-

• I > I⁺ > I^-

First ionisation potential of Be and B will be

• 8.8 and 8.8

• 6.6 and 6.6

• 6.6 and 8.8

• 8.8 and 6.6

Which of the following electronic configuration will have maximum IP difference between II^nd and III^rd ionisation potential?

• 1s², 2s² 2p⁶, 3s¹

• 1s², 2s² 2p⁶, 3s²

• 1s², 2s² 2p⁶

• 1s², 2s² 2p⁵

Which one of the following elements belongs to s-block?

• Aluminium

• Chromium

• Carbon

• Potassium

Which one is the correct decreasing order of the ionic radii of the ions?

• N^3- > O^2-> F^- > Na⁺

• N^3-> Na⁺> O^2- > F^-

• Na⁺ >O^2-> N^3-> F^-

• Na⁺> F^-> O^2->N^3-

The ionic radii of N^3-, O^2-, F^- and Na⁺ follow the order

• N^3- > O^2- > F^- > Na⁺

• N^3- > Na⁺ > O^2- > F^-

• Na⁺ > O^2- > N^3- > F^-

• O^2- > F^- > Na⁺ > N^3-

307.

18 carat gold contains

• 18% gold

• 24% gold

• 75% gold

• 60% gold

Which of the following metals will not form an amalgam?

• Gold

• Silver

• Zinc

• Iron

The element which liberates oxygen gas from water is

• P

• Na

• F

• I

The strongest oxidising agent amongst F₂, Cl₂, Br₂ and I₂ is

• F₂

• I₂

• Cl₂

• Br₂