ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Benzene hexachloride is used as

• Dye A
• Antimaterial drug B
• Antibiotic C
• Insecticide D

• di(4-bormophenyl) method A
• Methanol B
• Propan-1-ol C
• Propan-2-ol D

Angle is OF₂is

• 120⁰ A
• 180⁰ B
• 105⁰ C
• 102⁰ D

Alkyl halides react with lithium dialkyl copper reagents to give

• Alkenes A
• Alkyl copper halides B
• Alkanes C
• Alkenyl halides D

Which can be used for dehydration of alcohol

• P₄O₁₀ A
• H₂SO₄ B
• H₃PO₄ C
• All of them 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 are thermoplastic materials

• PVC A
• Polystyrenes B
• Polyethylene C
• All these D

Geographical survey of Pakistan estimates about billion tons of coal in Pakistan:

• 182 A
• 183 B
• 184 C
• 185 D

Cannizzaro's reaction is type of reaction:

• Self oxidation-reduction reaction A
• Disproportion reaction B
• Addition C
• A and B D

Water is often treated with chlorine to

• Increase oxygen content A
• Kill germs B
• Remove hardness C
• Remove suspended particles D

The presence of a double bond in a compound is the sign of

• Saturation A
• Unsaturation B
• Substitution C
• None of above D

Acid rain is due to increase in atmospheric concentration of

• Ozone and dust A
• CO₂and CO B
• SO₃and CO C
• SO₂and NO₂ D

Which of the following form normal oxide

• K A
• Li B
• Na C
• None D

Corrosion reaction are

• Spontaneous redox reaction A
• Non-spontaneous acid-base reactions B
• Spontaneous acid-base reactions C
• None of these D

1 mol of N₂O₄ was decomposed according to given equation in 1dm₃ container. At equilibrium x mole of N₂O₄ have dissociated. What is the value of K_C:

• 2x/(1-x)²

  A

• 4x²/(1-x)

  B

• 4x/(1-x)

  C

• 2x/(1-x)

  D

If the rate of reaction is independent of the concentration of the reactant, the reaction is of

• Zero order A
• First order B
• Second order C
• Third order D

Calcium carbonate contains oxygen in it

• 48% A
• 50% B
• 53% C
• 60% D

Which of the following species has unpaired electrons in ant-bonding molecular orbitals?

• O2⁺²

  A

• N2^-2

  B

• B₂

  C

• F₂

  D

Which is a component of macronutrient?

• Zn A
• N B
• Mo C
• Cl D

1-Chlorobutane on reaction with alcoholic potash gives

• But 1-ene A
• Butan-1-ol B
• But-2-ene C
• Butan-2-ol D

• With H₂/Ni CH₃(CH₂)₅CH₂OH A
• With H₂/Ni CH₃(CH₂)₅CH₃ B
• With NaBH₄ CH₃(CH₂)₅CH₂OH C
• With NaBH₄ CH₃(CH₂)₅CHO D

Nobel gases are placed group:

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

β-D-glucose is a monomer for

• Strach A
• Cellulose B
• Glycogen C
• Protein D

Which element form group 15 gives most basic compound with hydrogen?

• Nitrogen A
• Bismuth B
• Arsenic C
• Phosphorus D

Among group V-A elements, the most electronegative element is:

• Sb A
• N B
• P C
• As D

Which gas is used for welding purposes

• Butane A
• Nitrogen B
• Methane C
• Acetylene D

The range of visible spectrum is

• 300 - 600 nm A
• 600 - 900 nm B
• 400 - 750 nm C
• 100 - 300 nm D

NH₃, HCL, H₂O, HL are:

• Diatomic molecules

  A

• Poly-atomic molecules

  B

• Mono-atomic molecules

  C

• Hetero atomic molecules

  D

Which of the following synthetic fertilizer do not make soil acidic

• Urea A
• Thin urea B
• Ammonium phosphate C
• Potassium nitrate D

The solution of which acid is used for seasoning of food

• Formic acid A
• Acetic acid B
• Benzoic acid C
• Butanoic acid D