ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Which of the following has greatest tendency to lose electron?

• F A
• Fr B
• S C
• Be D

The equation of the rate of forward reaction is.

• Kf A
• Kf(C)(D) B
• Kr(A)(B) C
• Kr(A)(B) / Kf(C)(D) D

Factors affecting denaturation of proteins:

• Change in temp and pH A
• Strong reducing agent B
• Strong oxidizing agent C
• All of these D

The strength of economy of a country is measured with respect to production of

• Medicines A
• Cement B
• Fertilizers C
• Paper D

The decrease in radius in large for:

• Monovalent ions. A
• Trivalent ions. B
• Divalent ions. C
• Atoms. D

Which of the statements given below concerning properties of solution, describe a colligative effect?

• Boiling point of pure water decreases by the addition of ethanol A
• Vapour pressure of pure water decreases by the addition of nitric acid B
• Vapour pressure of pure benzene decreases by the addition of naphthalene C
• Boiling point of pure benzene increases by the addition of toluene D

Al³⁺is a symbol for aluminium

• Atom A
• Ion B
• Cation C
• Anion D

Reaction of ethylamine with chloroform in alcoholic KOH produces

• CH₃OH A
• CH₃NC B
• C₂H₅NC C
• C₂H₅CN D

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

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

K_bvalue of NH₄OH is 1.81 x 10^-5and its conjugate acid has K_a= 5.7 x 10^-10pKb of the base is 4.74, pKa of its conjugate acid is

• -4.74 A
• 4.74 B
• 10 C
• 9.26 D

One kilocalrie is equal to

• 4.184 x 10³J A
• 4.184 x 10⁴J B
• 4.184 x 10²J C
• None of these D

Aqua Regia has ratio of conc. HCl and HNO₃

• 1 : 2 A
• 1 : 3 B
• 1 : 4 C
• 2 : 3 D

Chemical composition of colemnite is:

• Ca₂B₆O₁₁.5H₂O A
• CaB₄O₇ .4 H₂O B
• Na₂B₇O₇. 4 H₂O C
• CaNaB₅O₉.8H₂O D

The lanthanides contraction is responsible for the fact that

• Zr and Y have about the same radius A
• Zr and Nb have similar oxidsation state B
• Zr and Hf have about the same radius C
• Zr and Zn have the same oxidation satete D

A double bond consists of:

• Two sigma bonds A
• One sigma and one pi bonds B
• One sigma and two pi bonds C
• Two pi bonds D

The chemical method used for determination of rate of reaction is

• Spectroscopic A
• Conductiometric B
• Refractometric C
• Titration D

London dispersion forces are also called

• Hydrogen bonding A
• Debye forces B
• Van de Waal's forces C
• Instantaneous dipole-induced dipole forces D

The liquid obtained after passing the mixture through filter paper is termed as:

• Extract A
• Residue B
• Filtrate C
• Sample D

Which of the following react with NaOH to produce an acid and an alcohol?

• NCHO A
• CH₃COOH B
• CH₃CH₂COOH C
• C₆H₅COOH D

Ethylene combines with water in the presence of H₂SO₄+ HgSO₄and forms

• Ethyle chloride A
• Ethyle alcohol B
• Carboxylic acid C
• None of these D

Ascorbic acid is a chemical name of

• Vitamin D A
• Vitamin A B
• Vitamin C C
• Vitamin B₆ D

If an endothermic reaction is allowed to take place very rapidly in air, the temperature of the surrounding air :

• Remains constant. A
• Decreases. B
• Increases. C
• Fluctuates rapidly. D

Which of these polymers is an addition polymer?

• Nylon-6,6 A
• Polystrene B
• Terylene C
• Epoxy resin D

The volume of a gas at 0^oC is 100 m3, what will be the volume of the same gas 546 ^oC, assuming that pressure remains constant.

• 5460 cm3 A
• 300 cm3 B
• 200 cm3 C
• 546 cm3 D

Alkanes containing carbon C₁₈ownwards are

• Gases A
• Liquids B
• Waxy solids C
• Solids D

Compound X has molecular formula C₁₀H₁₄O and is unreactive towards mild oxidising agents. What is the structure of the compound formed by dehydration of X

• 
  A
• 
  B
• 
  C
• 
  D

The element like nitrogen, phosphorus, calcium, are added in large amounts to the soils and are called

• Nutrents elemets A
• Basic elements B
• Basic elements C
• Additives D

Two elements whose electronegativities are 1.2 and 3.0, the formed between them would be

• Ionic A
• Covalent B
• Coordinate C
• Metallic D

Which term was derived from atomos?

• atom A
• hydrocarbon B
• aromatic C
• aliphatic D

• 1st order A
• 2nd order B
• Zero order C
• 3rd order D