Punjab 12th Class Chemistry Chapter 1 Periodic Classification of Elements & Periodicity MCQs Test Online

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Question 1 of 20

Chemistry

1. Period 5 in modem periodic table contains how many elements:

1.18

2.8

3.10

4.32

Question 1 of 20

Question 2 of 20

2. Mark the correct statement

1.The ionization energy of calcium is higher than that of beryllium.

2.The ionization energy of calcium is lower than that of strontium.

3.The ionization energy of calcium is lower than that of magnesium.

4.The ionization energy of calcium is lower than that of barium.

Question 2 of 20

Question 3 of 20

3. Mark the correct statement:

1.Boiling points of Group IVA hydrides decrease down the group.

2.Covalent character of metal halides increases form left to right in a period.

3.The basicity of group HA oxides decreases on descending the group.

4.Ionic character of hydrides increases from left to right in a period.

Question 3 of 20

Question 4 of 20

4. Keeping in view the size of atoms, which order is the correct one?

1.Cl > I

2.Mg > Sr

3.Lu > Ce

4.Ba > Mg

Question 4 of 20

Question 5 of 20

5. In the Mendeleev's periodic law the properties of elements are periodic  function of their:

1.Atomic masses

2.Atomic number

3.Densities

4.Volume

Question 5 of 20

Question 6 of 20

6. The concept of atomic number was introduced by

1.Mendeleeve

2.Moseley

3.Dobereiner

4.AL-nazi

Question 6 of 20

Question 7 of 20

7. Mork the correct statement

1.Na' is larger than Na atom

2.Na- is smaller than Na atom

3.Cl - is smaller than CI atom

4.CV (ion) and Cl (atom) are equal in size

Question 7 of 20

Question 8 of 20

8. Mark the correct statement

1.All the alkali metals are present in the same group,

2.All lanthanides are present in the same group.

3.All the noble gases are present in the same period,

4.All halogens are present in the same period.

Question 8 of 20

Question 9 of 20

9. Which statement is correct

1.Hydrogen resembles in properties with IIA. IIIA, and VITA elements.

2.Hydrogen resembles in properties with IIA, IVA, and VIA elements

3.Hydrogen resembles in properties with IIIA, IVA, and VA elements.

4.Hydrogen resembles in properties with IA, IVA, and VIIA elements.

Question 9 of 20

Question 10 of 20

10. Which one is an incomplete period?

1.4th

2.7th

3.5th

4.6th

Question 10 of 20

Question 11 of 20

11. Transition elements in 4th period is

1.18

2.10

3.6

4.8

Question 11 of 20

Question 12 of 20

12. In periodic table all the non-metals are placed under which of the blocks?

1.d

2.s

3.f

4.p

Question 12 of 20

Question 13 of 20

13. Mark the correct statement.

1.Metallic character increases down the group.

2.Metallic character remains same from left to right.

3.Metallic character increases from left to right.

4.Metallic character remains the same down the group.

Question 13 of 20

Question 14 of 20

14. Which statement Is Incorrect

1.All the metals are good conductor of heat.

2.All the metals form positive ions.

3.All the metals are good conductor of electricity

4.All the metals form acidic oxides.

Question 14 of 20

Question 15 of 20

15. Mark the correct statement:

1.Melting points of halogens first increase the then decrease down the group

2.Meting points of halogens increase down the group.

3.Meting points of halogens remain the same throughout the group.

4.Meting points of halogens decrease down the group.

Question 15 of 20

Question 16 of 20

16. 6th period contains the number of elements

1.8

2.32

3.10

4.18

Question 16 of 20

Question 17 of 20

17. The numbers of elements classified by Newlands in the periodic table are:

1.85

2.62

3.38

4.92

Question 17 of 20

Question 18 of 20

18. Mark the correct statement:

1.Electron affinity is measure of energy released by removing an electron.

2.Electron affinity is a measure of energy released by adding an electron

3.Electron affinity is measure of energy required to remove the electron.

4.Electron affinity is measure of energy required to excite an electron.

Question 18 of 20

Question 19 of 20

19. The elements of group Il-A are called.

1.Alkaline earth metals

2.Alkali metals

3.metalloids

4.Coinage metals

Question 19 of 20

Question 20 of 20

20. Position of isotopes in the periodic table was explained by:

1.Newland

2.Mendeleeve

3.Lother Meyer

4.Moseley

Question 20 of 20

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