9th Chemistry Unit 17 Organic Chemistry MCQs Sindh Board

 9th Grade Chemistry Chapter 17 Organic Chemistry 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 17 Organic Chemistry Most Repeated Multiple Choice Questions With Answers. Chemistry notes for class IX sindh board karachi Boards.

Chemistry Ninth Sindh Board Notes

Q.1: The branch of chemistry, which deals with the compounds of carbon is called:?

1. Analytical chemistry
2. Inorganic chemistry
3. Physical chemistry
4. Organic chemistry

D

Q.2: The first synthetic organic compound is:?

1. Acetic acid
2. Ethane
3. Urea
4. Methane

C

Q.3: Which is pure carbon:?

1. None of these
2. Coal gas
3. Coke
4. Coaltar

C

Q.4: Residue left after fractional distillation of coaltar:?

1. Pitch
2. Coke
3. Matte
4. None of these

C

Q.5: Natural gas mainly consists of:?

1. Butane
2. Ethane
3. Propane
4. Methane

D

Q.6: Fraction of petroleum containing 10-13 carbons, and its boiling range 150^oC-230^oC:?

1. Light oil
2. Kerosene
3. Gasoline
4. Natural gas

B

Q.7: Fraction of petroleum containing C₂₁ – C₄₀ boiling range is above 400^oC, is:?

1. Bitumen
2. Praffin wax
3. Light oil
4. Heavy oil

D

Q.8: The oils that have been carefully purified and decolourized, act as mild laxative are:?

1. Heavy oil
2. Kerosene
3. Gasoline
4. Light oil

D

Q.9: The process in which the octane rating of gasoline can be increased, is called:?

1. Reforming
2. isomerism
3. Refining
4. Cracking

A

Q.10: A series of compounds, in which each member differs from the preceding one by a constant ratio of (CH₂) methylene group, is called:?

1. Homologous series
2. None of these
3. Isomerism
4. Monologous series

A

Q.11: Isomerism in which the compounds possess the same molecular formula but different arrangement of carbon atoms in the hydrocarbon Chain is called:?

1. Functional isomerism
2. Metamerism
3. Position isomerism
4. Chain isomerism

D

Q.12: A process that breaks large molecules into smaller one, is called:?

1. None of these
2. Reforming
3. Refining
4. Cracking

D

Q.13: Compounds which contain only carbon and hydrogen elements, are called:?

1. Halides
2. carbohydrates
3. Hydrocarbons
4. None of these

C

Q.14: The hydrocarbons which contain one or more double or triple bonds, are called:?

1. Halogens
2. Paraffin
3. Saturated hydrocarbons
4. Unsaturated hydrocarbons

D

Q.15: The first member of alkene series is:?

1. Ethyne
2. Methane
3. Ethene
4. Ethane

C

Q.16: The hydrocarbons in which carbon atoms are arranged in rings, are called:?

1. Aromatic
2. Ali cyclic
3. Aliphatic
4. None of these

B

Q.17: The quality of petrol is measured by:?

1. Reforming
2. Cracking
3. Octane number
4. Decane number

C

Q.18: General formula for alkane is:?

1. C_nH_2n-2
2. C_nH_2n+1
3. C_nH_2n
4. C_nH_2n+2

D

Q.19: The first member of Alkyne series is:?

1. Ethene
2. Methane
3. Acetylene
4. Ethane

C

Q.20: The number of isomers in butane is:?

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

C

Q.21: An atom or group of atoms present in a molecule and is responsible for chemical behaviour is called:?

1. Aryl group
2. Alkenyl group
3. Alkyl group
4. Functional group

D

Q.22: Iso-butane possesses:?

1. Functional isomerism
2. Metamerism
3. Position isomerism
4. Chain isomerism

D

Q.23: Preparation of ethane from ethyl Alcohol is an example of:?

1. Hydration
2. Halogenation
3. Dehalogenation
4. Dehydration

D

Q.24: The Hydrocarbons which possess double bond in their molecules are called:?

1. Paraffins
2. Alkynes
3. Alkanes
4. Alkenes

D

Q.25: The alkanes are also called:?

1. Acetylenes
2. Paraffins
3. Olefins
4. Alkynes

D