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1 : In nectar undergoes a combustion reaction what products do you expect it to form?

A : Alkanes

B : Alkenes

C : CO2 and H2O

D : Both alkenes and alkanes

2 : Which other metal can be used for reduce alkyl halides?

A : Ai

B : Mg

C : Ni

D : Co

3 : Which other atom is almost always present along with carbon atom in all organic compounds?

A : Oxygen

B : Nitrogen

C : Halogen

D : Hydrogen

4 : Why does a mixture of zinc and hydrochloric acid acts as a reducing agent?

A : Because jeans acts as a reducing agent

B : Because atomic hydrogen is produced with Zn/ HCI which act as a reducing agent

C : Because molecular hydrogen is produced with Zn/ HCI which acts as a reducing agent

D : Because chloride ions are produced with Zn/ and HCI which act as a reducing agent

5 : Which of the following is not process of halogenation of alkanes?

A : Cracking

B : Chlorination

C : Bromination

D : Iodination

6 : Which alkane will involve the most amount of heat then it is burnt with oxygen?

A : Ethane

B : Propane

C : N-Butane

D : Iso-Butane

7 : Which reaction is not given by alkanes?

A : Substitution

B : Combustion

C : Addition

D : Cracking

8 : Which hydrocarbon is responsible for explosion in coal mines?

A : Butane

B : Pentane

C : Methane

D : Ethene

9 : How many moles of Oxygen will be required to completely burn propane?

A : 4 moles

B : 5 moles

C : 3 moles

D : 6 moles

10 : Which product will be formed when ethyl bromide (CH3 CH2 Br) is treated with Zn/HCI?

A : CH4

B : CH3-CH3

C : CH3-CH2-CH2-CH3

D : CH3-CH2-CH3

11 : What is the name of CH3-CH2-CH3?

A : Butane

B : Ethane

C : Propane

D : Methane

12 : What is the IUPAC name for C₂H₆?

A : Methane

B : Ethane

C : Methane

D : Butane

13 : What are organic compounds primarily composed of (in the context of combustion products)?

A : Carbon dioxide

B : Carbon monoxide

C : Oxygen

D : Methane

14 : Which of the following is a saturated hydrocarbon?

A : Ethene

B : Benzene

C : Ethyne

D : Methane

15 : What is the prefix used for a compound with four carbon atoms?

A : Eth

B : Prop-

C : Propane

D : Butane

16 : What type of reaction is combustion?

A : Endothermic

B : Exothermic

C : Substitution

D : Addition

17 : What is the general formula of alkanes?

A : CnH2n

B : CnH2n-2

C : CnH2n+2

D : CH

18 : What is the IUPAC name of C3H8?

A : Ethane

B : Propane

C : Propane

D : Butane

19 : Which element is always present in organic compounds?

A : Oxygen

B : Nitrogen

C : Carbon

D : Hydrogen

20 : What is the main product of complete combustion of methane?

A : Carbon monoxide and water

B : Carbon dioxide and water

C : Soot

D : Carbon monoxide only

Chemistry 9th MCQs || Ilam Ghar