ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

The rate of reaction :

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

Which of the following is produced when an aqueous solution of butan-2-ol is refluxed with dil acidified KMnO₄

• Butanol A
• Butanoic acid B
• Butanone C
• Butane D

The driving force for making a bond is

• To attain noble gas electronic configuration A
• To make soled compounds B
• To make different compounds C
• To make gaseous substances D

Red P can be obtained form white P by

• Heating it with a catalyst in an inert atmosphere A
• Distilling it in an inert atmosphere B
• Dissolving it in CS₂and crysllizing C
• Melting it ad pouring the liquid into water D

Reation of which with Grignard's reagent gives primary alcohol:

• Formaldehyde A
• Aldehyde B
• Ketones C
• Acetone D

Which one is alkali metal in them?

• Rubidium A
• Magnesium B
• Calcium C
• Barium D

Which is not a colligative property?

• Osmotic pressure A
• Lowering of vapour pressure B
• Depression of freezing point C
• Elevation of boiling point D

Which halide among the following is used as methylating agent?

• CH₃l A
• C₂H₅Cl B
• C₂H₅Br C
• C₆H₅Cl D

Oxidation state of boron, aluminium and gallium is:

• +1 A
• +2 B
• +3 C
• +5 D

10g of NaOH has been dissolved per kg of solvent. The molality of solution is :

• .25 m A
• 1.5 m B
• .5 m C
• 2.5 m D

The rate of diffusion of a gas in

• Inversely proportional to its density A
• Inversely proportional to square root of its molecular mass B
• Directly proportional to molecular mass C
• Directly proportional to its density D

• Plank's equations A
• de Broglie's equations B
• Heisenburg's equation C
• None D

Splitting of spectral lines when atoms are subjected to strong electron field is called

• Zeeman effect A
• Stark effect B
• Photoelectric effect C
• Compton effect D

Lattice energy of NaCI

• +5000 KJ A
• -344 KJ B
• -776 KJ C
• -411 KJ D

Which of the following is NOT used as fertilizer

• Anhydrous ammonia A
• Sodium hydroxide B
• Calcium nitrate C
• Ammonium phosphate D

• Acidified AgNO_3(aq) A
• Fehling's solution B
• Na C
• Na₂XO_3(aq) D

E.D.T.A is

• Mono-dentate A
• Bi-dentate B
• Polydentate C
• Having three lone pairs of electrons D

Steel may be manufacture by two processes which two are correct

• Open hearth process and besemer process A
• Open hearth process and Haber process B
• Bassemer process and Haber process C
• Contact process and Haber process D

Sodium thisoulophate is used in photography because of its

• Oxidizing behaviour A
• Reducing behaviour B
• Complexing behaviour C
• Photochemical behaviour D

Which is not nitrogeneous fertilizers?

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

The structure of ICI₂is

• Trigonal A
• Trigonal bipyramidal B
• Octahedral C
• Square planar D

The human body can synthesize ______ amino acids

• 1 A
• 10 B
• 20 C
• 19 D

In Boyle's law which of the following pair remains constant

• Temperature and quality of a gas A
• Pressure and quality of a gas B
• Temperature and pressure C
• Temperature and quantity of a gas D

Molar mass of high molecular w.f. polymers ranges from:

• 1000 to 10000 A
• 10000 to 100000 B
• 100000 to 1000000 C
• 1000 to 100000000 D

The compound prepared by a substitution reaction of benzene is

• Acetophenone A
• Glyoxal B
• Cyclohexame C
• Hexabromo cyclohexane D

The fourteen elements following actinium are known as

• Lanthanones A
• Lanthanides B
• Rare earths C
• Actinides D

Drawback DDT as presticide is

• I becomes ineffective after some time A
• It is less effective than others B
• It is not easily/rapidly degraded in nature C
• Its high cost D

Which of the following process is employed to convert alkyl halide into alcohol?

• Addition A
• Substitution B
• Dehydrohalogenation C
• Molecular rearrangement D

Reductive ozonolysis of benzene produces

• Acetone A
• Maleic anhydride B
• Phthalic acid C
• Glyoxal D

The cement plants in west Pakistan at the time of creation were

• ten A
• twenty two B
• four C
• twenty four D