Energy of an electron in the ground state of the hydrogen atom is -2.8 x 10^-18 J. Calculate the ionisation enthalpy of atomic hydrogen in terms of kJ mol^-1.

The electronic configuration of atom is one of the important factor which affects the value of ionisation potential and electron gain enthalpy. Explain.

In what period and group will an element with Z = 118 will be present?

Mention any two anomalous properties of second period elements.

What are metalloids? Give example.

To which block does the element with configuration 3d¹⁰ 4s² belong?

The second electron affinity of O is positive, whereas first is negative. Give reason.

A student reported the ionic radii of isoelectronic species X³⁺,Y²⁺ and Z^- as 136 pm,64 pm and 49 pm respectively.Is that oreder correct?Comment

Ionization energy of Mg is greater than that of AI. Why?

What is covalent radius? How would you.determine the covalent radius of chlorine atom?

Complete the following chemical reactions and classify them into
(a) hydrolysis (b) redox (c) hydration reactions.
(1) KMnO₄ + H₂O₂ ➝
(2) CrCl₃ + H₂O ➝
(3) CaO + H₂O ➝

What is water-gas shift reaction?

What are isotopes? Write the names of isotopes of hydrogen.

Mention the uses of deuterium.

(i) Can marine species live in distilled water?
(ii) Can distilled water be called as deionised water?

Compare the properties of isotopes of hydrogen.

Explain about the exchange reactions of deuterium oxide.

What are intra molecular hydrogen bonding? Explain with an example

Explain about the importance of hydrogen bonding in proteins.

Predict which of the following hydrides is a gas on a solid
(a) HCI
(b) NaH
Give your reason.