ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

On hydrolysis of starch, we finally get

• Glucose A
• Fructose B
• Both C
• Sucrose D

Among O, C, F, Cl, Br, the correct order of increasing radii is

• F O C Cl Br A
• F C O Cl Br B
• F Cl Br O C C
• C O F Cl Br D

Toluene is also called

• Hydroxyl benzene A
• Methyl benzene B
• ethyl benzene C
• None D

Rusting can be avoided by :

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

Which of the following is a carbonate are?

• Pyrolusite A
• Malchite B
• Diaspore C
• cassiterite D

Which of the following is not correct about transition metals?

• Their melting and boiling points are high A
• Their compounds are generally coloured B
• They can form ionic or covalent compounds C
• They do not exhibit variable valency D

A beaker contains 9 grams of water. The number of H-atoms is

• 6.02 x 1023 A
• 3.01 x 1023 B
• 6.02 x 1024 C
• 3.01 x 1024 D

Which decolourizes the colour of Br₃

• CH₄ A
• CH_3-CH_3-CH₃ B
• CH₂₌CH₂ C
• CH_3-CH₃ D

Which of the followings is not a nulceophile

• OH^- A
• NH₃ B
• C₂H₅O^- C
• Br₂ D

Heating a mixture of sodium benzoate and soda lime gives

• Methane A
• Benzene B
• Sodium bezoate C
• Calcium benzoate D

At Murree hills water will boil at about.

• 102 ^oC A
• 98 ^oC B
• 69 ^oC C
• 100 ^oC D

All 3d series elements show variable oxidation states. The one shown by all 3d elements is

• +2 A
• +3 B
• +4 C
• +5 D

The measurement of degree of disorder is

• Internal energy A
• Enthalpy B
• Entropy C
• None D

Pakistan at the time of existence in 1947 was a country:

• agrarian A
• industrial B
• nuclear C
• economically strong D

Which of the followingα-Amino acids has basic R-group

• Proline A
• Glutamic acid B
• Histidine C
• Valine D

Metallic conduction is also called as :

• Ionic conduction. A
• Protonic conduction. B
• Electronic conduction C
• Super conduction D

Alkyle halides can be prepared by treating halogen acids with

• Ethane A
• Ethanol B
• Ethene and ethanol C
• Aldehyde D

Hydrocarbons contain

• C and S only A
• C and H only B
• C, H, and O only C
• C, H, O and N only D

Benzene cannot undergo:

• Substitutions reactions A
• Addition reactions B
• Oxidation reactions C
• Elimination reactions D

• Br_2(aq) A
• 2, 4-dinitrophenylhydrazine B
• NaBH C
• Tollen's reagent D

3.01 x 10²²Ag⁺ions is present in

• 85 grams AgNO₃ A
• 0.85 g AgNO₃ B
• 8.5 g AgNO₃ C
• 18.5 g AgNO₃ D

Reduction of alkyl halides give

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

The boiling point of NH_{3 is maximum among the hydrides of group V elementsdue to:}

• Enhanced electronegative character of Nitrogen A
• Pyramidal structure of NH3 B
• Very small size of Nitrogen. C
• Enhanced electropositive character of Nitrogen D

Decomposition of carbonate of alkaline earth metals produce gas

• N₂ A
• Oxide B
• CO₂ C
• CO D

Alkanes are gases :

• C₁-C₄ A
• C₅-C₁₀ B
• C₁₁-C₁₅ C
• C₁₀-C₂₀ D

Functional group of ketones is:

• ---CHO A
• ---CO--- B
• ---C≡ N C
• ---COOH D

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

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

Direct conversion of solid into vapors is called :

• Crystallization A
• Sublimation B
• Obligation C
• Vaporization. D

What are alloys

• A homogenous mixture of two or more elements A
• A homohenous mixture of metal and a non-metal B
• A homogenous mixture of two or more metals C
• None of the above D

• 2 A
• 3 B
• 4 C
• 9 D