ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Alkaline battery has a voltage of

• 4.5 V A
• 3.5 V B
• 2.5 V C
• 1.5 V D

The molarity of the solution containing x grams (NH₄)₂SO₄in 500 cm³of the solution is 0.6 what is x

• 39.6 A
• 45.1 B
• 40.5 C
• 42.7 D

The most reactive compound for electrophilic nitration will be

• Benzyl chloride A
• Benzoic acid B
• Nitrobenzene C
• Chlorobenzene D

Which of the following compounds contains the highest percentage by mass of nitrogen?

• Ammonia, NH₃ A
• Ammonium carbamate, NH₂CO₂NH₄ B
• Ammonium carbonate, (NH₄)₂CO₃ C
• Hydrazine, N₂H₄ D

• 3 A
• 4 B
• 5 C
• 2 D

In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

• Lowering in b.pt A
• Reducing viscosity B
• Reducing specific heat C
• Lowering in freezing pt D

The method involved for electrolysis of Na or K salts of carboxylic acids

• Sabatier's sendrens reaction A
• Kolbe's method B
• Clemmensen C
• Wolf kishner reduction D

Reason of pollution are:

• Population and Urbanization A
• Transportation B
• Urbanization industrialization C
• All of these D

Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes

• 2 A
• 1 B
• 3 C
• 4 D

The human body can synthesize ______ amino acids

• 1 A
• 10 B
• 20 C
• 19 D

Metals like Fe, Mg, Al, Cr, Zn have more negative reduction potentials that is whey

• These don't react with steam A
• These react very slowly with steam to liberate H₂gas B
• These react rapidly with steam to produce the metallic oxides and liberate H₂gas C
• These react with cold water violently D

Which of the following is present in the stings of bees and wasps

• Formic acid A
• Citric acid B
• Carbolic acid C
• Formalin D

A nucleoside may be

• Ribonuleoside A
• Deoxyribonucleoside B
• Both a and b C
• None D

Na reacts with phenol to produce

• H₂gas A
• Benzene B
• CO₂gas C
• CO gas D

What will be the molarity of solution if 103 g (NH₄)₂SO₄is dissolved per 600 cm³of water

• 2.32 M A
• 3.32 M B
• 4.32 M C
• 1.30 M D

If liquids A and B form an ideal solution

• The enthalpy of mixing is zero A
• The entropy of mixing is zero B
• The free energy of mixing is zero
  C
• The free energy as well as the entropy of mixing are each zero D

The solution of which acid is used for seasoning of food

• Formic acid A
• Acetic acid B
• Benzoic acid C
• Butanoic acid D

Alkali metals have electrons in s-orbital:

• one A
• two B
• three C
• Four D

Which of the following molecules has a net dipole moments

• CO₂ A
• CS₂ B
• SO₂ C
• CCI₄ D

Alkynes are colourless & odouless except

• Acetylene A
• Propyne B
• Butyne C
• Pentyne D

Composition of clay in cement is:

• 25% A
• 50% B
• 75% C
• 80% D

Which one of the following reaction rate is effected by the light

• 
  A
• 
  B
• 
  C
• 
  D

Corrosion reaction are

• Spontaneous redox reaction A
• Non-spontaneous acid-base reactions B
• Spontaneous acid-base reactions C
• None of these D

Reduction with aluminium isopropoxide in excess of Isopropyl alcohol is called Meerwein Ponndroff-Verley reduction (MPV). What will be the final product when cyclohex-2-enone is selectively reduces in MPV reaction?

• Cyclohexanol A
• Cyclohex-2-enol B
• Cyclohexanone C
• Benzene D

Give IUPAC name fo Acetone

• Ethanal A
• Propanone B
• Butanone C
• Propanal D

Which of the following liquids has low vapour pressure at 25⁰C

• Diethyl ether A
• Acetone B
• Water C
• Ethyl alochol D

The Zwitter ion is also called

• International salt A
• Internal salt B
• No salt C
• None of these D

The carbon atom of a carbonyl group is

• Sp hybridized A
• Sp²hybridized B
• Sp³hybridized C
• None of these D

Which of the following molecules have multiple bonds

• CH₄ A
• C₂H₄ B
• C₂H₆ C
• CCI₄ D

Depletion of ozone layer is due to

• Oxides of nitrogen A
• Oxides of carbon B
• Oxides of sulphur C
• None of the above D