ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Which compound was recognized the parent member of aromatic compounds

• Aniline A
• Phenol B
• Benzene C
• Toluene D

Essentialα-amino acids are those which are necessary in the diet

Which one is an essentialα-amino acids

• Alanine A
• Aspartic acid B
• Glycine C
• Tryptophan D

Which of the following compounds gives a ketone with Grignard's reagent?

• Formaldehyde A
• Ethanenitrile B
• Ethyl alcohol C
• Methyl iodide D

The number of isotopes of gold is

• 3 A
• 1 B
• 2 C
• 4 D

Ammonium nitrate fertilizer is not used for which crop?

• Cotton A
• Wheat B
• Sugar-cane C
• Paddy rice D

Ammonium nitrate fertilizers is not used for which crop?

• Cotton A
• Wheat B
• Sugar-cane C
• Paddy rice D

Dobereiner gave his law in the year:

• 1829 A
• 1864 B
• 1871 C
• 1931 D

The bond angle H - O - H in ice ins closest to

• 120° , 28^' A
• 60° B
• 90° C
• 109° D

When propanamide reacts with Br₂and NaOH then which of the following compounds is formed?

• Ethyl alcohol A
• Propyl alcohol B
• Propyl amine C
• Ethylamine D

• Aqueous bromine A
• Dilute HNO₃ B
• Dilute HCI C
• CH₃COCI D

Ozone is not

• An allotrope A
• A powerful oxidizing agent B
• Paramagnetic C
• A bent molecule D

At present cement plants in Pakistan are:

• Ten A
• Twenty Two B
• Four C
• Twenty Four D

Tripple bond is present in

• O₂ A
• H₂ B
• N₂ C
• Cl₂ D

Atomospheric pollutant is

• CO₂ A
• CO B
• O₂ C
• N₂ D

The fiber which is made from acrylonitrile as monomer:

• PVC A
• Rayon Fiber B
• Acrylic fiber C
• Polyester fiber D

The benzene molecule contains:

• Three double bond A
• Two double bond B
• One double bond C
• DelocalizedᏘ electron charge D

The divisibility of atom was shown by

• Stoney A
• J.J. Thomson B
• Millikan C
• Rutherford D

Boric acid cannot be used:

• An antiseptic in medicine A
• For washing eyes B
• In soda bottles C
• For enamels and glazes D

• Condensation A
• Electrophilic substitution B
• Free radical substitution C
• Nucleophilic substitution D

Ionic radius, in a period from left to right

• Increases A
• Decreases B
• Decreases then increases C
• Increases and decreases D

An oil or fat with no double bond have iodine number:

• Zero A
• 100% B
• 50% C
• minimum D

While balancing an equation by ion electron method, the number of oxygen atoms are balanced by

• OH^- A
• H₂O B
• O₂ C
• H⁺ D

The cell in which a non-spontaneous redox reaction takes place as a result electricity is known as :

• Electrolytic cell. A
• Voltaic cell. B
• Daniel cell. C
• Dry cell. D

An azeotropic mixture of two liquids boils at a lower temperature than either of them when :

• It is saturated. A
• It shows positive deviation from Raoult's law. B
• It show negative deviation from Raoult's law. C
• It is metastable. D

Write the name of following compound

• 5 - methyle - 2- hexene A
• 2 - methyle hexene B
• 4 - ethyle - 2 - methyle hexene C
• 3 - ethyle - 3 - methyl hexene D

• 0.12 A
• 0.50 B
• 0.25 C
• 4.00 D

In the ground state of an atom the electron is present

• In the nucleus A
• In the second shell B
• Nearest to the nucleus C
• Farthest from the nucleus D

Half life period of a first order reaction is independent of:

• Presence of catalyst. A
• Conditions of temperature B
• Initial concentration of the compound C
• All of above D

On passing HCI gas through a saturated solution of commercial sodium chloride, pure crystals of NaCI are precipitated due to

• Increase in pH of the solution A
• Decrease in pH of the solution B
• Common ion effect C
• Increase in ionization of NaCl D

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

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