ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

The amino acids which human body can synthesize are called ______ amino acid

• Essential A
• Non essential B
• Acidic C
• Basic D

When a compound X is passed through a dilute alkaline solution of KMnO₄the pink colour of solution is discharged. The compound X is possbibly

• Methane A
• Ethane B
• Ethene C
• Benzene D

The elements with atomic numbers 9, 17, 35, 53, 85 an all

• Noble gases A
• Halogens B
• Heavy metals C
• Light metals D

Transition elements belong to

• I-A & II-A A
• III-A to VIII-A B
• I-B to X-B C
• Lanthanides D

An organic acdi having molecular formula C₂H₄O₂is

• Formic acid A
• Acetic acid B
• Oxalic acid C
• Propionic acid D

• Pressure change A
• Temperature change B
• Concentration change C
• Catalyst D

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

• H₂SO₄ A
• Ni B
• Fe₂O₃ C
• Al₂O₃ D

Which of the following is present in the stings of bees and wasps

• Formic acid A
• Citric acid B
• Carbolic acid C
• Formalin D

The value of charge on electron is

• 1.602 x 10^-19coulombs A
• 1.602 x 10^-18coulombs B
• 1.602 x 10^-17coulombs C
• 1.602 x 10^-16 coulombs D

0.5 M of H₂SO₄is diluted from 1 litre to 10 litre, normality of resulting solution is

• 1 N A
• 0.1 N B
• 10 N C
• 11 N D

Which of the following does not turn Schiff's reagent to pink?

• Formaldehyde A
• Bezaldehyde B
• Aceton C
• Methyl chloride D

Which of these polymers is a synthetic polymer?

• Animal fat A
• Starch B
• Cellulose C
• Polyester D

Dust particles in smoke is a solution of the type

• Liquid is solute and solid is solvent A
• Solid is solute and liquid is solvent B
• Solid is solute and gas is solvent C
• Gas is solute and solid is solvent D

In exothermic reaction decrease in potential energy of the products will result in

• Decreases in kinetic energy of the particles A
• Increases in kinetic energy of the particles B
• No change in kinetic energy C
• Decreases in activation energy D

The term aromatic was derives from

• Greek word A
• Latin B
• Russian C
• English D

Major component in cement is

• SiO₂ A
• Lime B
• Al₂O₃ C
• MgO D

On heating glycerol with conc. Sulphuric acid a compound with unpleasant odour is obtained. The compound is

• Methyl alcohol A
• Formic acid B
• Prop-2-enal C
• Glycerol sulphate D

A solution of sodium sulphate was electrolysed using some insert electrodes. The products at the electrodes are

• O₂, H₂ A
• O₂, Na B
• O₂, SO₂ C
• O₂, S₂O₈² D

• -1.10 V A
• +1.10 V B
• -0.42 V C
• +0.42 V D

Which of the following elements is most electronegative?

• Oxygen A
• Chlorine B
• Nitrogen C
• Fluorine D

On hydrolysis of starch, we finally get

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

Elevation of boiling point is measured by

• Beckmann's apparatus A
• Lands Berger's method B
• Antifreeze apparatus C
• None of these above D

Which one of the following is a buffer

• HCI + NaCI solution A
• CH₃COOH + CH₃COONH₄solution B
• H₂SO₄+ CaSO₄solution C
• CH₃COOH + CH₃COONa D

A state function is a

• Microscopic property A
• Macroscopic B
• Unique property C
• Both a and c D

In gases and liquids, temperature is the measure of

• Average translational kinetic energies of molecules A
• Average vibrational kinetic energies of molecules B
• Average rotational kinetic energies of molecules C
• None of above D

Coordination number of Pt in [PtCI(NO₂) (NH₃)₄]²⁺is

• 2- A
• 4 B
• 1 C
• 6 D

Group VI-A elements are called:

• Halogens A
• Electron deficient B
• alkaline earth metal C
• Chalcogens D

The correct order of electron affinity among the following is

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

Which statement about the following equilibrium in correct?

2SO_{2 (g)}+ O_2(g)---------------2sO_3(g)H= - 188.3 KJ mol-1

• T value of K_{p falls witha rise in temperate.} A
• The value of K_{p falls withincreasing pressure}
  B
• Adding V_2O5catalyst increase the equilibrium yield of sulfur trioxide
  C
• The value of K_{p is equal to}K_p D
• 
  
  E

Normal by product of cracking is

• Ethane A
• Butane B
• Benzene C
• All of them D