Trends in Properties of Elements, Class 11 Chemistry NCERT Solutions

1. There will be total 20  MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. The element with lowest ionization energy among the following is:

Li

Na

Rb

K

Your comments:

Question 1 of 20

2. Isoelectronic species have:

Same number of neutrons

Same atomic mass

Same number of electrons

Same number of protons

Your comments:

Question 2 of 20

3. The cause of periodicity of properties of elements is due to the repetition of similar:

Density

Electronic configuration of atoms in the outermost energy shell

Atomic number

Atomic mass

Your comments:

Question 3 of 20

4. Tendency of an atom in a molecule to attract the shared pair of electron towards itself is called:

Electronegativity

Ionisation enthalpy

Electron gain enthalpy

Periodicity

Your comments:

Question 4 of 20

5. Identify the smallest ion among the following:

Na⁺

Mg²⁺

K⁺

Al³⁺

Your comments:

Question 5 of 20

6. Na⁺ is smaller than Na atom because:

The effective nuclear charge is greater in case of sodium ion.

Nucleus in each case contains different nucleons.

Na+ is more stable than in Na atom.

Sodium atom has one electron lesser than sodium ion.

Your comments:

Question 6 of 20

7. Electron gain enthalpy is most negative for:

Fluorine

Sulphur

Phosphorus

Chlorine

Your comments:

Question 7 of 20

8. Among the following the element with highest first ionization energy is:

C

Al

Be

Si

Your comments:

Question 8 of 20

9. Which of the following elements will have the largest atomic radii?

Sr

Al

Li

Ca

Your comments:

Question 9 of 20

10. For noble gases radius is measured as:

Atomic radius

Ionic radius

van der Waals radius

Metallic radius

Your comments:

Question 10 of 20

11. The electronegativity of following elements increases in the order of?

Si, P, C, N

P, Si, N, C

C, N, Si, P

N, Si, C, P

Your comments:

Question 11 of 20

12. Which of following statement is incorrect regarding ionization enthalpy:

The greater increase in ionization enthalpy is experienced on removal of electron from core noble gas configuration

Ionization enthalpy increases on moving from left to right along a period

Ionization enthalpy decreases down the group

Removal of electrons from orbitals bearing lower n value is easier than from orbital having higher n value

Your comments:

Question 12 of 20

13. Which of the following elements has the largest ionisation enthalpy?

O

F

C

N

Your comments:

Question 13 of 20

14. Anion O^- is isoelectronic with:

Ne

N^3-

N^2-

F^-

Your comments:

Question 14 of 20

15. What happens to atomic radius on going from left to right in a period in a periodic table?

Remains constant

Increases

Decreases

Decreases first and then remains constant

Your comments:

Question 15 of 20

16. When an electron is added to neutral gaseous atom to convert it into a negative ion, the enthalpy change accompanying the process is called:

Ionisation enthalpy

Electron gain enthalpy

Lattice enthalpy

Hydration enthalpy

Your comments:

Question 16 of 20

17. Which of the following is isoelectronic with F^-?

Ne

Ar

Cl^-

Mg⁺

Your comments:

Question 17 of 20

18. Among the following elements element with highest ionisation enthalpy is:

N

C

O

B

Your comments:

Question 18 of 20

19. The largest atomic radius among the following is of:

Na

Mg

K

Ca

Your comments:

Question 19 of 20

20. Electron gain enthalpy values of noble gases are positive because:

They are all gases

They are monoatomic

They have smallest size

They have stable electronic configuration

Your comments:

Question 20 of 20

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