ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Among the following, poly cyclic compound is:

• styrene A
• cumene B
• napthalene C
• xylene D

Hydrogenation of vegetable oils is accelerated by Ni catalyst. The catalytic activity of Bi is increased by a promoter of activator which is

• Na and K A
• Na and Hg B
• Hg and Zn C
• Cu and Te D

Molarity of pure water is :

• 33.3 A
• 55.5 B
• 44.4 C
• 66.6 D

Mass spectrometer measures the

• Exact mass of an element A
• Average mass of an element B
• The number of elements present in a molecule C
• m/e value of a positive ion D

Which of the following phenomena will occur when two atoms of the elements having same spin of electron approach for bonding?

• Orbital overlap will not occur A
• Bonding will not occur B
• Both (A) and (B) are correct C
• None of the above are correct D

Oxalic acid oxidizes to:

• CO A
• CO₂ B
• Oxalates C
• None of these D

Poly hydroxyl compounds of aldehyde and ketones are:

• Carbohydrates A
• Proteins B
• Fats C
• Lipids D

The simplest separating unit of a polymer is called:

• Monomer A
• Dimer B
• Trimmer C
• Macromer D

Which of the following factors does not influenced the rate of reaction

• Concentration of the reaction A
• Nature of the reactants B
• Molecularity of the reaction C
• Temperature D

The word paper is derived from the name of which seedy plant?

• Rose A
• Sun flower B
• Papyrus C
• Water Hyacinth D

Factors affecting quality of water:

• D.O A
• BOD B
• COD C
• All of these D

Which of the following is not a fatty acid

• Propanoic acid A
• Acetic acid B
• Phthalic acid C
• Butanoic acid D

Benzene hexachloride is used as

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

Cannizzaro's reaction is type of reaction:

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

Which one of the following elements is not present in all proteins?

• Carbon A
• Hydrogen B
• Nitrogen C
• Sulphur D

During the manufacturing process of cement the temperature of the decomposition zone goes up to

• 600°C A
• 800°C B
• 1000°C C
• 1200°C D

Acid rain is due to increase in atmospheric concentration of

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

CH₃CH₂COOH is also named as:

• Propionic acid A
• Propanoic acid B
• Acetic Acid C
• Both (a) and (b) D

Which statement is incorrect about standard hydrogen electrode

• Its oxidation and reduction potential is zero A
• It consists of Pt wire dipped on 1 molar HCI solution B
• The electrolyte is 1 molar NaOH solution C
• H₂gas is passes in it at 1 atmospheric pressure D

White phosphorus is

• A mono atomic gas A
• P₄, a tetrahedral solid B
• P₈, a crown C
• A linear diatomic molecule D

An alkynes having Carbon count of 20 is

• gas A
• liquid B
• Solid C
• None D

DNA has deoxyribose, a base and the third component is

• Phosphoric acid A
• Ribose B
• Adenine C
• Thymine 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

Borax is hydrated:

• Penta A
• Deca B
• Hepta C
• Octa D

Which of the following is a carbonate are?

• Pyrolusite A
• Malchite B
• Diaspore C
• cassiterite D

The element with atomic number 55 belongs to which block of the periodic table

• s-block A
• p-block B
• d-block C
• f-block D

XeF₄has shape of

• Sphere A
• Trigonal bipyramidal B
• Tetrahedral C
• Square planar D

In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms?

• Two A
• Three B
• One C
• Four D

Acetamide is prepared by

• Heating ammonium acetate A
• Heating methyl cyanide B
• Heating ethyl acetate C
• The hydrolysis of methyl cyanide D

• Forward A
• Backward B
• Already in equilibrium C
• K_cis never less D