ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

A reaction in which heat is given out is

• An endothermic reaction A
• An exothermic reaction B
• A thermochemical reaction C
• An energetic reaction D

1 mole of N₂and 2 moles of H₂are allowed to react in a 1 dm³vessel. At equilibrium 0.8 mole of NH₃is formed. The concentration of H₂in the vessel is

• 0.6 mole A
• 0.8 mole B
• 0.2 mole C
• 0.4 mole D

Structure of P₄ is

• Trigonal A
• Tetragonal B
• Hexagonal C
• Monoclinic D

Half life period of a first order reaction is independent of:

• Presence of catalyst. A
• Conditions of temperature B
• Initial concentration of the compound C
• All of above D

Alkali metals have electrons in s-orbital:

• one A
• two B
• three C
• Four D

Ethyl alcohol on oxidation with K₂Cr₂O₇gives

• Acetic acid A
• Acetaldehyde B
• Formaldehyde C
• Formic acid D

Of the following which is a step growth polymer

• Bakelite A
• Polyethylene B
• Teflon C
• PVC D

The maximum number of electrons in the outermost shall of s-black elements is

• One A
• Two B
• Three C
• Four D

The M.P. of carboxylic acids containing even number of carbon atoms is ______ than the next

• Higher A
• Low B
• Equal C
• None D

Benzene is prepared from n-hexane in the presence of catalyst

• Cr₂O₃ A
• Al₂O₃ B
• SiO₂ C
• All above D

Diethyl ether is obtained by Williamsons synthesis using

• Ethanol + Na + C₂H₅Br A
• Ethanol + Mg + C₂H₅Br B
• Methanol + Na + CH₃Br C
• Methanol + Mg + CH₃Br D

Which of the following contains single bonds

• Benzene A
• Alkyne B
• Alkene C
• Alkane D

Which is made by coordinate covalent bond

• H₃O⁺ A
• H₂O B
• CH₄ C
• HCl D

Which one of the following statements about glucose and sucrose is incorrect?

• Both are soluble in water A
• Both are naturally occuring B
• Both are carbohydrates C
• Both are disaccharides D

Terylen fibre is made by reaction of terephthalic acid with

• Ethylene A
• Ethylene glycol B
• Glycol C
• Terylene D

Calorie is equivalent to

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

BOD is

• Biological oxygen deficit A
• Biosphere oxygen demand B
• Biological oxygen demand C
• None of the above D

Which salt is used for the treatment of hyperacidity in stomach

• NaCl A
• KCl B
• NaHCO₃ C
• Na₂CO₃ D

The gasoline having octane No. 100 has ______

• More knocking A
• Less knocking B
• No knocking C
• Only knocking D

Formic Acid is obtained from Red out by:

• Distillation A
• Crystallization B
• Filtration C
• sublimation D

Partial reduction of acetic acid happens with

• NH₃ A
• LiAIH₄ B
• P + HI C
• PCI₅ D

Which Amino acid can be synthesized by over body.

• Basic amino acids A
• Acidic amino acids B
• Essential amino acids C
• Non-essential amino acids D

Enzymes are chemically

• Carbohydrates A
• Proteins B
• Fatty acids C
• Phospholipids D

• s A
• p B
• d C
• f D

Protein may have

• Primary structure A
• Secondary structure B
• Tertiary structure C
• All of these D

Dehydrohalogenation of alkyl halides produces

• Alcohol A
• Alkane B
• Alkene C
• Alkyne D

Which of the following human activities are contaminating surface and ground waters

• Pesticides A
• Septic tanks B
• Petroleum and natural gas production C
• All of these D

Ionization energies increase from left to right along the period due to

• Increase in nuclear charge A
• Repulsion of electron increases B
• Repulsion of protons increase C
• Atomic size increase along the period D

In the hydrolysis of CH₃COOC₂H₅the acid produced is

• Inhibitor A
• Catalyst B
• Auto catalyst C
• None of above D

The prosthetic group in glycoprotein is

• Carbohydrate A
• Fat B
• Vitamin C
• Nucleic acid D