ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

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

By simply reacting Grignand's reagent with water we get

• An alkane A
• Higher alkane B
• An alkene C
• An alkyne D

The rate of reaction :

• Remain same as reaction proceeds. A
• May decrease or increase as reaction proceeds . B
• Increase as reaction proceeds. C
• Decreases as reaction proceeds. D

Enzymes, in the living systems

• Provide energy A
• Provide immunity B
• Transport oxygen C
• Catalyze biochemical processes D

In sp²type hybridization the three equivalent sp²orbitals lie in the same plane and at angle of

• 0° A
• 60° B
• 120° C
• 180° D

Li, Be, B, C, O, Fl Ne are elements of

• Second period A
• First period B
• Third period C
• Fourth period D

Chlorine heptoxide (Cl2O7) reacts with water to form

• Hypochlorous acid A
• chloric acid B
• Perchloric acid C
• Chlorine and Oxygen D

Which compound does not show hydrogen bonding with water

• CH₃OH A
• C₂H₅OH B
• CH₃- O - CH₃ C
• C₆H₅OH D

The number of electrons in the M shell of the element with atomic number 24 is

• 24 A
• 12 B
• 13 C
• 8 D

Glucose in the presence of zymase is converted into

• Alcohol A
• Acid B
• Ethyl alcohol C
• Ketone D

Which of the following (1 M) conducts more electricity?

• Sulphuric acid A
• Boric acid B
• Nitric acid C
• Phosphorus acid D

Kolb's method of alkanes production, is actually

• Hydrolysis A
• Catalysis B
• Electrolysis C
• Hydrogenation D

Which period starts from ₁₁Sc to ₃₀Zn ?

• First Period A
• Second Period B
• Third Period C
• 4th Period D

The conversion of chemical energy into electrical energy requires :

• Electrolytic cell A
• Galvanic cell B
• Voltaic cell C
• Both (b) and (c) D

Naturally occurring lipids are called

• Fats A
• protein B
• Steroids C
• None D

The density of water decreases, when it is freezed at 0^oC because of

• Change of bond lengths A
• Change of bond angles B
• Cubic structure of ice C
• Empty spaces present in the structure of Ice D

• Reversible reaction A
• Irreversible reaction B
• Spontaneous reaction C
• None of these D

0.1 molar glucose (C₆H₁₂O₆) solution has the % W/N

• 1.8% A
• 18% B
• 0.18% C
• 2.8% D

Which of the following is not a synthetic polymer?

• Polyethylene A
• PVC B
• Nylon C
• Cellophane D

NaHCO₃is prepared by

• Down's process A
• Solvay's process B
• Nelson's process C
• None of these D

• First order A
• Pseudo first order B
• Second order C
• Zero order D

In zero order reaction, the rate is independent of :

• Temperature of reaction A
• Concentration ofreactants B
• Concentration of products C
• None of these. D

The rate of reaction :

• Decreases as the reaction proceeds A
• Increases as the reaction proceeds B
• May decrease or increase reaction proceeds C
• Remains same as the reaction proceeds D

Which of the following equation represents reaction when lithium nitrate is heated.

• 2LiNo4------- Li2O + NO2 A
• 4Li NO3 ------- 4LiO2 + 4NO2 +O2 B
• LiNO3---------Li2O + 4NO2 C
• 2LiNO4------- Li2O + NO2+O2 D

To meet the due need of food by increasing population we must use in agriculture

• good seeds A
• pesticides B
• fertilizers C
• all D

What are non-metals?

• Sb & Bi A
• P & Bi B
• N & P C
• As & N D

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

A polymer may be

• Linear A
• Branched B
• Cross linked C
• All of these D

Sintered glass is porous material used for:

• Absorption A
• Decoration B
• Filtration C
• All of above D

75% plant nutrients are present in the fertilizer:

• Urea A
• NH₄NO₃ B
• NH₃ C
• (NH₄)₂HPO₄ D