Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsShort Answer Type

141. Explain why difference in IE, and IE2 values of sodium is more than that of magnesium.
154 Views

Advertisement

142.

Energy of an electron in the ground state of the hydrogen atom is -2.18 X 10-18J. Calculate the ionization enthalpy of atomic hydrogen in terms of J mol-1.


The enthalpy required removing an electron in the ground state of hydrogen atom
= - (its energy in the ground state)
= -(-2.18 x 10-18 J)
= 2.18 x 10-18 J
∴ Ionization enthalpy per mole of hydrogen atoms

149 Views

Advertisement

 Multiple Choice QuestionsLong Answer Type

143. Would you expect the second electron gain enthalpy of O as positive, more negative or less negative than the first? Justify your answer.
Or
What are successive electron gain enthalpies? Explain why second or higher electron gain enthalpy will have positive value.
196 Views

 Multiple Choice QuestionsShort Answer Type

144.

Discuss in brief the factors which influence the magnitude of electron gain enthalpy.

128 Views

Advertisement
145.

How does electron gain enthalpy vary along a group?

336 Views

146.

How does electron gain enthalpy vary along a period?

193 Views

147.

Why do halogens have very higher value of electron gain enthalpy?

185 Views

148.

Why do noble gases have large positive electron gain enthalpies?

279 Views

Advertisement
149.

The electron gain enthalpy of fluorine has less negative value than that of chlorine while it is expected to be more. Explain.

616 Views

150.

Explain which of the following will have the most negative electron gain enthalpy and which the least negative: P, S, CI, F.

150 Views

Advertisement