9th Chemistry Unit 12 Carbon Silicon & Their Components MCQs Sindh Board

 9th Grade Chemistry Chapter 12 Carbon Silicon & Their Components 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 12 Carbon Silicon & Their Components Most Repeated Multiple Choice Questions With Answers. Chemistry notes for class IX sindh board karachi Boards.

9th Chemistry MCQs

Q.1: Graphite bars are used in atomic reactors because graphite is?

1. Good conductor of electricity
2. More reactive than diamond
3. Slows down the neutrons
4. Soft solid

C

Q.2: Diamond is used as abrasive because it is?

1. Soft
2. Cubic
3. Hard
4. Bad conductor of electricity

C

Q.3: Silicon is most abundantly found in nature as.?

1. SilicaSiO₂
2. Calcium silicate
3. Silicon carbide (SiC)
4. Sodium silicate

A

Q.4: China clay is used in making of?

1. Crockeries
2. Electrical insulator
3. Ceramics
4. Glass

A

Q.5: Fused Silica which is also known as quartz glass is used for making;?

1. Absorbent
2. Optical lenses and prisms
3. Silicon carbide
4. Concrete or cement

B

Q.6: Melting point of sodium silicate is?

1. 1410^oC
2. 11009^oC
3. 1090^oC
4. 990^oC

C

Q.7: Soft coal is called?

1. Lignite
2. Peat
3. Anthracite
4. Bitumen

D

Q.8: The hardest Natural Substance Known to man is?

1. Silica
2. Graphite
3. Bucky Balls
4. Diamond

D

Q.9: Boil or carbando is the?

1. Blue Diamond
2. Yellow Diamond
3. Green Diamond
4. Black Diamond

D

Q.10: Clusters of carbon atoms as molecules of?

1. Coke
2. Bort
3. Plumbago
4. Bucky Ball

D

Q.11: Shape of diamond crystal is?

1. hexagonal
2. Needle like
3. Cubic
4. Octahedral

D

Q.12: The layers are arranged in parallel form one above the other?

1. Graphite
2. Diamond
3. Water Glass
4. Silica

A

Q.13: Coal is the amorphous form of the?

1. Carbon
2. Iron
3. Silicon
4. Calcium

A

Q.14: Coke is produced by heating bituminous coal to very high temperature about?

1. 1400^oC
2. 1300^oC
3. 1350^oC
4. 1090^oC

B

Q.15: --------- burns in air with no smoke and leaves very little residue.?

1. Coal
2. Coke
3. Charcoal
4. Coaltar

B

Q.16: All the different carbon allotropes are black or grayish black solids except?

1. Bucky Balls
2. Graphite
3. Diamond
4. None of these

C

Q.17: Allotropes of carbon have high melting point, above?

1. 2000^oC
2. 4000^oC
3. 3000^oC
4. 1000^oC

C

Q.18: Carbon is powerful?

1. Oxidizing agent
2. Bleaching agent
3. Reducing Agent
4. None of these

C

Q.19: The ability of the carbon atoms to bond itself forming long chains and rings?

1. Conduction
2. Carbonization
3. Called
4. None of these

C

Q.20: Which one of the following is bad conductor of electricity?

1. Diamond
2. Silver
3. Copper
4. Graphite

A