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

1 : Alkanes

2 : Alkenes

3 : CO2 and H2O

4 : Both alkenes and alkanes

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

1 : Ai

2 : Mg

3 : Ni

4 : Co

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

1 : Oxygen

2 : Nitrogen

3 : Halogen

4 : Hydrogen

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

1 : Because jeans acts as a reducing agent

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

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

4 : 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?

1 : Cracking

2 : Chlorination

3 : Bromination

4 : Iodination

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

1 : Ethane

2 : Propane

3 : N-Butane

4 : Iso-Butane

7 : Which reaction is not given by alkanes?

1 : Substitution

2 : Combustion

3 : Addition

4 : Cracking

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

1 : Butane

2 : Pentane

3 : Methane

4 : Ethene

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

1 : 4 moles

2 : 5 moles

3 : 3 moles

4 : 6 moles

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

1 : CH4

2 : CH3-CH3

3 : CH3-CH2-CH2-CH3

4 : CH3-CH2-CH3

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

1 : Butane

2 : Ethane

3 : Propane

4 : Methane

12 : What is the IUPAC name for C₂H₆?

1 : Methane

2 : Ethane

3 : Methane

4 : Butane

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

1 : Carbon dioxide

2 : Carbon monoxide

3 : Oxygen

4 : Methane

14 : Which of the following is a saturated hydrocarbon?

1 : Ethene

2 : Benzene

3 : Ethyne

4 : Methane

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

1 : Eth

2 : Prop-

3 : Propane

4 : Butane

16 : What type of reaction is combustion?

1 : Endothermic

2 : Exothermic

3 : Substitution

4 : Addition

17 : What is the general formula of alkanes?

1 : CnH2n

2 : CnH2n-2

3 : CnH2n+2

4 : CH

18 : What is the IUPAC name of C3H8?

1 : Ethane

2 : Propane

3 : Propane

4 : Butane

19 : Which element is always present in organic compounds?

1 : Oxygen

2 : Nitrogen

3 : Carbon

4 : Hydrogen

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

1 : Carbon monoxide and water

2 : Carbon dioxide and water

3 : Soot

4 : Carbon monoxide only

Chemistry 9th MCQs || Ilam Ghar