ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Which one of the following is not an alkali metal

• Francium A
• Caesium B
• Rubidium C
• Radium D

In Solids, the temperature is the measure of

• Rotational kinetic energies A
• Translational kinetic energies B
• Vibrational kinetic energies C
• None of above D

Which of the following is an aromatic compound

• Propanol A
• Cyclohexane B
• Acetone C
• Benezene D

Which is not the affect of polluted air on environment

• Acid rain A
• Smog B
• Ozone C
• Global warming D

A transition metal complex can be recognized by various terms. Which is not the proper term

• Central metal ion A
• Coordination number B
• Ligand C
• Geometry of complex D

Most metals are conductors of electricity because of the :

• Light weight. A
• Immobility of the electrons. B
• Lustrous surfaces C
• Relatively free movement of their electrons D

The concentration of reactants is increased by x, then equilibrium constant K becomes

• ln K/x A
• K/x B
• K + x C
• K D

Ethylene polymerizes at 100 atm pressure and 400°C to give

• Polybenzene A
• Polyalcohol B
• Polypropylene C
• Polyethylene D

The test used for the detection of ethanol in the mouth of a drunk driver is that the drunk driver is asked to blow air from mouth into a solution of K₂Cr₂O₇and H₂SO₄. The colour changes, if the driver is drunk

• From orange to green A
• From pink to green B
• From orange to colorless C
• From pink to colorless D

Which metal of Group-II A of the periodic Table, will form the least ionic chloride

• Be A
• Mg B
• Ca C
• Sr D

The distillation of coal at high temperature and in absence of air is called

• Vacuum distillation A
• Normal distillation B
• Fractional distillation C
• Destructive distillation D

Simple sugars are :

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

The hydrocarbon which is used as an illuminating agent

• Methane A
• Methene B
• Methyne C
• B & C D

The order of decreasing ease of reaction with ammonia is

• Anhydrides, esters, ethers A
• Anhydrides, ethers, esters B
• Ethers, anhydrides, esters C
• Esters, ethers, anhydrides D

Alkyl halides on treatment with metallic Na give

• Alkynes A
• Alkenes B
• Alkanes C
• Alcohols D

In the manufacture of NH₃by Haber's process catalyst used is iron its catalytic efficiency is poisoned by

• Presence of Al₂O₃ A
• Presence of Cr₂O₃ B
• MnO₂ C
• CO present with H₂gas D

The number of paper industries in Pakistan are

• 30 A
• 25 B
• 35 C
• 20 D

Escape of high energy molecules from the surface of a liquid is called

• Sublimation A
• Distillation B
• Condensation C
• Evaporation D

Which has maximum protein content?

• Ground nut A
• Cow milk B
• Egg C
• Wheat D

A limiting reactant is the one which

• Is taken in lesser quantity in grams as compared to other reactants A
• Is taken in lesser quantity in volume as compared to other reactants B
• Gives the maximum amount of the product which is required C
• Gives the minimum amount of the product under consideration D

The most reactive elements are:

• Group IV-A A
• Group V-A B
• Group VI-A C
• Group VII -A D

The rigid rocket part of earth crust called lithosphere extends upto a depth of:

• 10 km A
• 100 km B
• 1000 km C
• 1500 km D

Which one of the following is a colligative property?

• Surface tension A
• Osmotic pressure B
• Viscosity C
• Refractive index D

Orthophosphoric acid is

• Monobasic A
• Dibasic B
• Tribasic C
• Tetrabasic D

The number of groups in the periodic table is

• 6 A
• 7 B
• 8 C
• 9 D

• The value of K_pfalls with a rise in temperature A
• The value of K_pfalls with increasing pressure B
• Adding V₂O₅catalyst increase the equilibrium yield of sulphur trioxide equilibrium yield of sulphur trioxide C
• The value of K_pis equal to K_c D

Chromatography is derived from Greek word 'Khromatos' means:

• Type writting A
• Printing B
• Color writing C
• Writing D

The ph of 10-3 mole dm-3 of an aqueous solution of H₂SO₄ is :

• 3.0

  A

• 2.7

  B
• 2.0 C

• 1.5

  D

Out of all the elements of group V1-A the highest melting and boiling points is shown by the element

• Te A
• Se B
• S C
• Pb D

The electrophile in aromatic sulphonation is

• H₂SO₄ A
• HSO₄ B
• SO₃ C
• SO₃⁺ D