ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

• Hear of reaction A
• Heat of formation B
• Heat of neutralization C
• Heat of combustion D

Amino acids are bifunctional organic compounds what are the two function groups

• Carboxylic acid and alcohol A
• Alcohol and aldehyde B
• Carboxylic acids and ketone C
• Amino group and carboxylic acid D

Hybridized in oxygen is:

• sp A
• sp² B
• sp³ C
• dsp³ D

Matter is defined as any thing which occupies space and:

• Molecules A
• Mass B
• Compound C
• Molecules D

• Electrophilic substitution A
• Free radical reduction B
• Isomerisation C
• Nucleophilic substitution D

Which one of the following substance is use as decolonizing agent

• Asbestos A
• Animal charcoal B
• conc, H₂SO₄ C
• Silica gel D

Major fertilizers with micro—nutrients are

• Nitrogeneous A
• Phosphatic B
• Potash C
• a,b,c D

Organic acid without a carboxylic acid group is

• Ascorbic acid A
• Vinegar B
• Oxalic acid C
• Picric acid D

In electrolysis of NaCl when Pt electrode is taken then H₂is liberated at cathode while with Hg cathode it forms sodium amalgam

• Hg is more inert than Pt A
• More voltage is required to deduce H⁺at Hg than Pt B
• Na is dissolved in Hg while it does not dissolve in Pt C
• Conc. of H⁺ions is larger when Pt electrode is taken D

Reduction of alkyl halides give

• Alkanes A
• Alkenes B
• Ketones C
• Ether D

Colour of PCl₅is:

• Red A
• Yellowish White B
• Grey C
• Colourless D

A condensation polymer among the following is

• Dacron A
• PVC B
• Polysterene C
• Teflon D

Those compound which have any atom other than C as member of rings are called as

• Monocyclic A
• Hetrocyclic B
• Aliphatic C
• Both a and b D

Acetaldehyde is used to make

• Rubbber A
• Antiseptics B
• Phenolic resin C
• All of these D

The steroids of fungi and yeast are called:

• Vitamin D A
• Vitamin D₂ B
• Ergosterol C
• Cholestorl D

Alcohols, phenols and ethers may be considered as derivative of

• Hydrocarbons A
• Benzene B
• Carboxylic acid C
• Water D

A homogeneous mixture of two or more than two chemical substances is called

• Solute A
• Solution B
• Solvent C
• Salvation D

If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air:

• Remains constant. A
• Increase. B
• Decreases. C
• Remain unchanged. D

Alkali and alkaline earth metals are basic oxides except:

• Li A
• Be B
• Fr C
• Ba D

Which is used in arc welding and cutting?

• He A
• Ne B
• Ar C
• Kr D

Catalytic oxidation of alkanes is used for the preparation of

• Adehydes A
• Ketones B
• Fatty acid C
• Carbonyylic acids D

During the mechanism of aldol condensation a/an ______ is formed

• Oxide A
• Alkali B
• Alkoxide ion C
• None of these D

The hydrocarbon which is used as an illuminating agent

• Methane A
• Methene B
• Methyne C
• B & C D

K_bvalue of NH₄OH is 1.81 x 10^-5and its conjugate acid has K_a= 5.7 x 10^-10pKb of the base is 4.74, pKa of its conjugate acid is

• -4.74 A
• 4.74 B
• 10 C
• 9.26 D

The bond angles in methane CH₄are equal to

• 109.5° A
• 107.5° B
• 104.5° C
• 120° D

Rusting can be avoided by :

• Making alloys A
• Tin or Zinc plating B
• Use of enamel C
• All of these D

Replacement of hydrogen atom by - SO₃H group in benzene is called

• Nitration A
• Alkylation B
• Sulphonation C
• Acylation D

Sodium chloride imparts a yellow colour to the Bunsen flame. This can be interpreted due to the

• low ionization energy of sodium A
• sublimation of metallic sodium to give yellow vapour B
• emission of excess energy absorbed as a radiation in the visible region as a radiation in the visible region C
• photosenitivity D

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

• Evaportation A
• Effusion B
• Conduction C
• Diffusion D

The optimum conditions of temperature and pressure to get maximum NH₃form N₂and H₂gases is

• 2000°C and 10 atmosphere A
• 0°C and 1 atmosphere B
• 400°C and 200-300 atmosphere C
• 200°C and 100 atmosphere D