ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Benzene reacts with chlorine to form benzene hexachloride in presence of

• Nickel A
• AlCl₃ B
• Bright sunlight C
• Zinc D

• Low pressure A
• High pressure B
• High temperature C
• High concentration of SO₂ D

The conversion of n-hexane into benzene by heating in the presence of Cr₂O_{3 is called:}

• Isomerization A
• Aromatization B
• Dealkylation C
• Rearrangment D

CO₂absorber used in breathing tanks is

• K₂O₂ A
• K₂O B
• KO₂ C
• Na₂O₂ D

Acetamides are formed by the reaction of carboxylic acids with

• Acids A
• Bases B
• Salts C
• NH₃ D

Reaction of Grignard's reagent with ketones gives: Reaction of Grignard's reagent with formaldehyde gives:

• Pri-alcohol A
• Sec-Alcohol B
• Ter-alcohol C
• Carboxylic D

Which one o the following does not belong to alkaline earth metals?

• Be A
• Re B
• Ba C
• Rn D

Which molecule out of given molecules will not form hydrogen bond with another of the given molecules.

• NH3 A
• CH3OH B
• CH2NH3 C
• CH2CHO D

The movement of molecules from a region of high pressure to vacuum is called :

• Evaporation A
• Effusion B
• Conduction C
• Difusion D

Vitamin A is present in

• Liver A
• Milk B
• Green vegetables C
• All D

How many secondary alcoholic groups are present in the structure of glucose OHC CHOH CHOHCH OH CHOH CH₂OH

• 1 A
• 2 B
• 3 C
• 4 D

Formula of chloroform is:

• CH₃Cl A
• CCl₄ B
• CH₂Cl₂ C
• CHCl₃ D

If half life period of a reaction is independent of the concentration of the reactants, then the reaction is

• Zero order A
• First order B
• Second order C
• Order is in fraction D

Which of the following will be good conductor of electricity

• Pure distilled water A
• Molten NaCl B
• Dilute solution of glucose C
• Chloroform D

During reaction of O₂and alkenes, a product:

• Glycol A
• Epxide B
• Halohydrin C
• Ethylene glycol D

Chlorophyll contains in it

• Li A
• Na B
• Mg C
• Ca D

Which formula represents the organic compound formed by the reaction of propanoic acid with methanol in the presence of concentrated sulphuric acid as a catalyst

• CH₃CH₂COCH₃ A
• CH₃CH₂CO₂CH₃ B
• CH₃CO₂CH₂CH₃ C
• CH₃CH₂CH₂CO₂CH₃ D

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called:

• Fibre A
• Plastic B
• Vanish C
• Polyamide resin D

The reaction of Zinc with copper sulphate solution is an example of

• Oxidation reduction reaction A
• Spontaneous reaction B
• Spontaneous redox reaction C
• Non-spontaneous reaction D

A process which takes place on its own without any outside assistance and moves from a non-equilibrium state towards an equilibrium state is termed as

• Spontaneous process A
• Natural process B
• Non-spontaneous process C
• Both a and b D

Calorie is equivalent to :

• 0.4184 J A
• 4184 J B
• 4.184 J C
• 418.4 J D

Lattice energy of NaCI

• +5000 KJ A
• -344 KJ B
• -776 KJ C
• -411 KJ D

The difference of potential of two electrodes when concentration of solution is 1M each at 25°C and1 atm is called :

• Cell reaction. A
• Electrode potential. B
• Cell voltage. C
• Standard cell potential. D

Amides on treatment with Br₂and KOH are converted into amines, the reaction is known as

• Hoffmann's bromamide reaction A
• Hoffmann's methylation B
• Gabriel phthalimide reaction C
• H.V.Z reaction D

DDT is a:

• Fungicide A
• Insecticide B
• Herbicide C
• All D

SN2 reaction can be best carried out with

• Primary alkyl halides A
• Secondary alkyl halides B
• Tertiary alkyl halides C
• All the three D

The molarity of solution containing 14.5 grams urea (N₂H₄CO) dissolved in 100 cm³of the solution is

• 1 molar A
• 0.1 molar B
• 0.2 molar C
• 0.25 molar D

An oil or fat with no double bond have iodine number:

• Zero A
• 100% B
• 50% C
• Minimum D

Vegetables oils are:

• Unsaturated fatty acids A
• Glycerides of unsaturated fatty acids B
• Essential oils obtained form plants C
• None of these D

Which of the following is not aromatic hydrogencarbon

• Benzene A
• Naphthalene B
• Toluene C
• Cyclohexene D