9th Chemistry Unit 4 Periodicity Of Elements MCQs Sindh Board

 9th Grade Chemistry Chapter 4 Periodicity Of Elements Sindh Board MCQs Notes Online Chapter Wise Question Answers. Sindh Boards Chemistry Subject Notes For Exams Preparations Karachi, Jamshoro, Sindh Boards. Chemistry class Ninth sindh board notes Unit 4 Periodicity Of Elements Most Repeated Multiple Choice Questions With Answers. Chemistry notes for class IX sindh board karachi Boards.

Chemistry Notes Sindh Board

Q.1: Doberieners classification was based on?

1. atomic mass
2. physical behavior
3. chemical behavior
4. atomic number

C

Q.2: Which one of these groups can make Dobereiners triads?

1. Li\,\ Na\,\ K
2. CI, Br, S
3. S, Se, Ca
4. Ca, Sr, I

A

Q.3: According to Newlands Law of Octaves, with in the arrangement of elements, every Eight element will have properties similar to the:?

1. second element
2. third element
3. first element
4. fourth element

C

Q.4: According to Law of Octaves, the properties of Li resembles with:?

1. CI
2. Na
3. Be
4. Mg

B

Q.5: Which elements occupy the peaks of the curves of Lothar Meyers graph?

1. Alkali metals
2. Alkaline earth metal
3. Halogens
4. Noble gases

A

Q.6: Which one of these elements was suggested as transition clement by Mendeleev?

1. Ni
2. N
3. Ne
4. N

A

Q.7: Potassium 39K is allocated in:?

1. Group IIA
2. Group IIIA
3. Group IA
4. Group IVA

C

Q.8: Mendeleev named the elements of group VIII as:?

1. Alkaline earth metals
2. Noble gases
3. Alkali metals
4. Transition elements

D

Q.9: Na has valency 1, its group is?

1. Group IV
2. Group III
3. Group II
4. Group I

D

Q.10: Mg is present in group II, what will be its valency?

1. 4
2. 3
3. 1
4. 2

D

Q.11: The number of noble gases is?

1. 4
2. 2
3. 6
4. 8

C

Q.12: According to Mendeleevs periodic table, which one of the element belongs to the group VIII?

1. Co
2. Ni
3. Fe
4. All of them

D

Q.13: One what basis, Moseley arranged elements in periodic table?

1. Nucleon number
2. Atomic mass
3. Atomic number
4. Mass number

C

Q.14: The atomic number of K is.?

1. 21
2. 19
3. 20
4. 18

B

Q.15: How many groups were present in Mendeleevs periodic table?

1. 18
2. 8
3. 7
4. 12

B

Q.16: How many periods were present in Mendeleevs periodic table?

1. 8
2. 7
3. 12
4. 18

C

Q.17: How many groups are present in modern periodic table?

1. 10
2. 8
3. 18
4. 14

B

Q.18: How man periods are present in modern periodic table?

1. 9
2. 12
3. 7
4. 18

C

Q.19: Group I to VIII of modern periodic table are further divided into two parts. What are these parts known as?

1. Both A and B
2. None of them
3. Sub-group B
4. Sub-group A

A

Q.20: Where is group VIII B placed in modern periodic table?

1. On right side
2. At the centre
3. Second to first on left side
4. On left side

A

Q.21: How many elements arc present in first period of modern periodic table?

1. 2
2. 18
3. 8
4. 1

A

Q.22: Which elements are present in first period of modern periodic table?

1. He, Li
2. H\,\ He
3. Be, B
4. Li, Be

B

Q.23: How many elements are present in second period of the modern periodic table?

1. 18
2. 2
3. 32
4. 8

D

Q.24: Which period of the periodic table is the longest?

1. Fourth
2. First
3. Sixth
4. Eighth

C

Q.25: Which period of the modern periodic table is still incomplete?

1. Third
2. Fifth
3. First
4. Seventh

D