ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Coal contains sulphur in it :

• 1 - 3% A
• 1 - 6% B
• 1 - 9 % C
• 1 - 12% D

The wave length of visible light is 500 nm. In S.I. unit this value is

• 5 x 10^-8m A
• 5 x 10^-9m B
• 500 x 10^-7m C
• 500 x 10^-9m D

Isotonic solutions have same

• Molar concentration A
• Molality B
• Normality C
• None of these D

Alkanes may be prepared by the reaction of alkyl halides with

• Alcohol A
• Carboxylic acid B
• Grignard reagents C
• None of these D

A graph between P and 1/V at constant temperature and number moles of a gas meets the

• y-axis A
• x-axis B
• origin C
• none of above D

Enzymes are

• Proteins A
• Minerals B
• Oils C
• Fatty acids D

Number of isomers of butane are:

• One A
• Two B
• Three C
• Four D

Glacial acetic acid freezes to ice like solid it.

• 07 A
• 17 B
• 27 C
• 37 D

Ozone hole refers to

• Hole in ozone layers A
• Reduction in thickness of ozone layer in stratosphere B
• Reduction of thickness of ozone in troposphere C
• Increase concentration of ozone D

Which is an inert gas?

• Nitrogen A
• Oxygen B
• Hydrogen C
• CO D

When electrically is passed through molten Al₂O₃+ Na₃AlF₆and 13.5 gms of Al are deposited, the number of farady must be

• 0.5 A
• 1.0 B
• 1.5 C
• 2.0 D

Iodine value of an oil or fat may be defined as

• The number of grams of iodine taken up by 1 g of the oil or fat A
• The number of grams of iodine taken by 10 g of the oil or fat B
• The number of grams of iodine taken by 100 g of the oil or fat C
• None of the above 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

Organic compounds containing halogen atom are called:

• R---OH A
• R----X B
• R----NH₂ C
• R----COH D

Which one of the following properties is not correct for ozone?

• It oxidizes lead sulphides A
• It oxidizes potassium iodide B
• It oxidizes mercury C
• It cannot act as a bleaching agent D

Components of environment are:

• Atmosphere A
• Hydrosphere B
• Lithosphere C
• All of these D

Determination of atomic masses and invention of system of writing symbols was made by:

• J. Berzelius A
• Democritus B
• Dalton C
• None of above D

Which of the following statements is correct?

• Phenol is less acidic than ethyl alcohol A
• Phenol is more acidic than ethanol B
• Phenol is more acidic than carbonic acid C
• Phenol is more acidic than CH₃COOH D

Cotton has cellulose in it:

• 96% A
• 97% B
• 98% C
• 99% D

SnCI₂have ______ shape

• Planner A
• Tetrahedral B
• Angular C
• None D

Tungsten and Uranium are turned to an reaction with HNO₃:

• Oxides A
• chlorides B
• Nitrides C
• Nitrates D

• Adding 2(ii) + 3(iii) and subtracting i A
• Add i + ii + iii B
• Add i - ii + iii C
• Add i - ii - iii D

Which metal is used in the thermit process because of its activity?

• Iron A
• Copper B
• Alumnium C
• Zinc D

Simple sugars are :

• Monosacchrides A
• Disaccharides B
• Oligo saccharides C
• Trisaccharides D

How many molecules of chlorine adds in benzene in the presence of sunlight

• One A
• Two B
• Three C
• Four D

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

• A ketone A
• An aldehyde B
• An ether C
• Water D

Hemoglobin is 68000 times heavier than:

• Oxygen atom A
• Nitrogen atom B
• Carbon atom C
• Hydrogen atom D

Benzene has a -------- structure

• Pentagonal A
• Hexagonal B
• Heptagonal C
• Tetragonal D

Ethanol containing some methanol is called

• Absolute spirit A
• Rectified spirit B
• Power alcohol C
• Methylated spirit D

Hydrogen bond is the strongest between the molecules of

• HF A
• HCl B
• HBr C
• HI D