ECAT Pre Engineering Chemistry Chapter 19 online mcq test with answers for chapter 19 (Aliphatic Hydrocarbons)

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Sr.#	Question	Answer
1	Which decolourizes the colour of Br₃	A. CH₄ B. CH_3-CH_3-CH₃ C. CH₂₌CH₂ D. CH_3-CH₃
2	The electron releasing effect of methyl group is significant and it makes ring a good	A. Electrophilic B. Nucleophilic C. Nucleophobic D. Hydrophobic
3	The sp²hybird orbitals are oriented in space at one angle	A. 180° B. 109.5° C. 100° D. 120°
4	Formula of chloroform is:	A. CH₃Cl B. CCl₄ C. CH₂Cl₂ D. CHCl₃
5	Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively	A. Zinc dust and soda lime B. Soda time and zinc dust C. Zinc dust and sodium hydroxide D. Soda lime and copper
6		A. 2-bromonitrobenzene B. 2-nitrobromobenzene C. 1-bromonitrobenzene D. 1-nitrobromobenzene
7	Which one of the following gases is used for artificial ripening of fruits	A. Ethene B. Ethane C. Methane D. Propane
8	Meta directing group decreased the ----------- of benzene ring	A. Physical activity B. Chemical reactivity C. Density D. None
9	Which gas is used for welding purposes	A. Butane B. Nitrogen C. Methane D. Acetylene
10	An alkynes having Carbon count of 20 is	A. gas B. liquid C. Solid D. None
11	Benzene was discovered by Michael Faraday's in	A. 1824 B. 1825 C. 1826 D. 1827
12	The hydrocarbons having double bonds normally end with suffix	A. Ane B. Ene C. Yne D. Oic
13	Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCI, are converted to	A. Alkynes B. Alkenes C. Alkanes D. Alcohol
14	The hydrocarbon which is used as an illuminating agent	A. Methane B. Methene C. Methyne D. B & C
15	The difference between amount of heat actually released and that of calculated is called	A. Bonding energy B. Activation energy C. Resonance energy D. Transition energy
16	In CH₄, all the H-C-H bond angles are	A. 120° B. 107° C. 109° D. 109.5°
17	Physical properties of alkanes increase with increase of all physical constants except	A. Boiling points B. Melting points C. Density D. Solubility
18	Ethylene combines with water in the presence of H₂SO₄+ HgSO₄and forms	A. Ethyle chloride B. Ethyle alcohol C. Carboxylic acid D. None of these
19	Paraffins are also called	A. Alkanes B. Alkynes C. Alkenes D. None of these
20	β-β- dichloroethyle sulphide is commonly known as:	A. Mustared gas B. Laughing gas C. Phosgene gas D. Bio gas
21	Odour of alkene is:	A. Fruity B. Odourless C. Zarlic like D. Irritating
22	Synthesis rubber is made by polymerization :	A. Chloroform B. Acetylene C. Divinyl acetylene D. Butene
23	Preparation of vegetable ghee involves	A. Halogenations B. Hydrogenation C. Hydroxylation D. Dehydrogenation
24	Benzene is obtained from benzene sulphonic acid by treating with	A. HCl B. NaOH C. H₂O D. NaHCO₃
25	De halogenatiion of tetrahalides happens in the presence of active metal like	A. Zn B. Mg C. Both a and b D. None of them
26	C₁₈and onward hydrocarbons are normally	A. Gases B. Liquids C. Solids D. Plasma
27	Incomplete oxidation of alkanes yields	A. CO₂& carbon black B. CO₂+ heat C. CO and carbon black D. CO + heat
28	Which of the following reaction is characteristic of benzene	A. Electrophilic substitution reaction B. Reduction C. Oxidation D. Ozonolysis
29	Alkyne is :	A. CH_3-CH₃ B. CH₄ C. CH₂₌CH₂ D. C₂H₂
30	Kolb's method of alkanes production, is actually	A. Hydrolysis B. Catalysis C. Electrolysis D. Hydrogenation

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ECAT Pre Engineering Chemistry Chapter 19 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons

ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons

In CH4, all the H-C-H bond angles are

The alkynides are used for the ----------- of alkynes

The method in which alkanes prepared by alkyle halides in the presence of palladium - charcoal is

Vinyl acetylene combines with HCI to form

The hydrocarbon used for polymerization is

Paraffins are also called

Which of the following is not an ortho-para directing group

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

Toluene is also called

Acetylene when treated with 10% H2SO4in the presence of HgSO4adds one molecule of water to form

When an aqueous solution of potassium salt of monocarboxylic acid is subjected to electrolysis, corresponding alkane is formed. This reation is known as

Raney - nickel is the alloy of Ni with

Which one of the following gases is used for artificial ripening of fruits ?

Ethylene polymerizes at 100 atm pressure and 400°C to give

When methane reacts with Cl2in the presence of diffused light the products obtained are?

Substitution of halogen in the benzene ring requires catalyst

Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?

The molecule of ethane possess which hybrization

Mustard gas is a :

Preparation of vegetable ghee involves

Hydrocarbons are organic compounds which contain elements such as

Amongst the following the compound that can be most readily sulphonated is

The treatment of benzene with isobutene in the presence of sulphuric acid give

Alkanes are soluble in all except

Ethylene combines with water in the presence of H2SO4+ HgSO4and forms

Acetylene gives

The reaction-method that does not give an alkane is

Which is symmetric alkene?

During reaction of O2and alkenes, a product:

Alkanes containing carbon C18ownwards are

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In CH₄, all the H-C-H bond angles are

Acetylene when treated with 10% H₂SO₄in the presence of HgSO₄adds one molecule of water to form

When methane reacts with Cl₂in the presence of diffused light the products obtained are?

Ethylene combines with water in the presence of H₂SO₄+ HgSO₄and forms

During reaction of O₂and alkenes, a product:

Alkanes containing carbon C₁₈ownwards are