StudentAidUnit 11: Hydrocarbons — Mcqs
9th Class Chemistry · Unit 11: Hydrocarbons
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Multiple Choice Questions (Exercise): Tick (✓) the correct answer.
1.Which other atom is almost always present along with carbon atom in all organic compounds?
2.Which other metal can be used to reduce alkyl halides?
3.If naphtha undergoes a combustion reaction what products do you expect to form?
4.Why does a mixture of zinc and hydrochloric acid acts as a reducing agent?
5.Which alkane will evolve the most amount of heat when it is burnt with oxygen?
6.Indicate the most reactive hydrocarbon?
- a CH3-CH3
- b CH2=CH2
- c CH≡CH
- d CH4
7.Which hydrocarbon is responsible for explosions in coal mines?
8.Which product will be formed when ethyl bromide (C2H5Br) is treated with Zn/HCl:
9.Which of the following is not a process of halogenation of alkanes?
10.How many moles of oxygen will be required to completely burn propane?
SOLO Based Additional MCQs: Tick (✓) the correct answer.
Introduction
11.The ability of carbon atoms to form chains is called:
12.The branch of chemistry which deals with the study of hydrocarbons and their derivatives is known as:
13.The most essential element for organic compound is:
14.Which carbon compounds are not considered organic compound?
15.Carbon is present in periodic table:
16.Examples of organic compounds are:
- a C2H6
- b CH3Cl
- c CH3OH
- d All of these
17.The valency of carbon is:
18.The formula which represents the actual number of atoms in one molecule of an organic compound is called:
Hydrocarbons
19.Simplest family of organic compounds is:
20.Which of the following is considered as parent organic compound?
Alkanes
21.Which one of these hydrocarbon molecules would have no effect on an aqueous solution of bromine?
22.If an organic compound has 4 carbon atoms. All singly bonded, it will have the following characteristics except one:
23.What is the molecular formula for the eight alkane member, octane, which is found in petrol?
24.Which one of the following is a substitution reaction?
25.Which is the simplest alkane?
26.Condensed formula of ethane is:
27.Molecular formula of butane is:
28.The formula of pentane is:
29.The general formula of saturated hydrocarbons is:
30.Saturated hydrocarbons are also called:
31.Alkane molecules are:
32.Which one of these is a saturated hydrocarbon?
33.The longest continuous carbon chain in IUPAC nomenclature tells:
34.The group /groups attached to longest continuous carbon chain determines ________ name.
35.The root prop- corresponds to ________ no. of carbon atoms:
Preparation
36.The reduction of alkyl halides takes place in the presence of:
37.Hydrogenation of alkenes and alkynes takes place at room temperature in the presence of:
- a Ni
- b Pt
- c Pd
- d both a and b
38.Alkenes are produced in large amounts by cracking of:
- a Natural gas
- b Petroleum
- c Benzene
- d Xylol
39.Higher molecular mass hydrocarbons are broken up into smaller in a process called:
40.During the process of cracking, naphtha is heated up to:
41.The catalyst used for cracking of naphtha is:
42.The breakdown of naphtha produce:
43.Alkenes are produced in large amounts by cracking of:
44.Which of the following will react with one mole of H2 to form saturated hydrocarbon?
Important Reactions
45.Halogenation of methane produces following valuable chemical compounds used as solvent except:
46.Substitution reaction is the characteristics of:
47.Halogenation of alkanes in the presence of diffused sunlight takes:
48.Alkanes give reaction only:
49.Alkanes do not react in:
50.Main component of natural gas is:
51.What percent of natural gas consists of methane (CH4)?
52.Alkanes are least reactive compounds because they are:
53.Which one is the formula of chloromethane?
54.No. of moles of oxygen required to completely burn ethane is: