ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Which of the following does not react with phenyl hydrazine?

• Ethanol A
• Ethanal B
• Acetone C
• Acetophenone D

To calculate volume of the solvent, we need to know, the :

• Density of solute A
• Normality of solute B
• Mass of solute C
• Molarity of solute D

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

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

Volcanoes produce SO₂:

• 47% A
• 57% B
• 67% C
• 77% D

The phenomenon of isotropy was first discovered by

• Soddy A
• Rutherford B
• Bohr C
• Dalton D

In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

• Lowering in b.pt A
• Reducing viscosity B
• Reducing specific heat C
• Lowering in freezing pt D

Time required to deposit one millimole of aluminium metal by the passage of 9.65 amperes through molten electrolyte containing aluminium ion is

• 30 s A
• 10 s B
• 30,000 s C
• 10,000 s D

Which of these polymers is a synthetic polymer?

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

Most common reactions of benzene and its derivatives are

• electrophilic addition reactions A
• electrophilic substitution reactions B
• Nucleophilic addition reactions C
• Nucleophilic subtitution reactions D

Forms of waste products :

• Heat A
• Smoke B
• Solid C
• All of these D

During the mechanism of aldol condensation a/an ______ is formed

• Oxide A
• Alkali B
• Alkoxide ion C
• None of these D

Potassium permanganate is.

• A powerful reducing agent A
• A powerful oxidizing agent B
• A redox agent C
• An alkaline compound D

The uncertainty principle was stated only

• De Brogilie A
• Heinsenberg B
• Einstein C
• Schrodinger D

NaBH₄and LialH₄are

• Ionic hydrides A
• Covalent hydrides B
• Interposal hydrides C
• Complex hydrides D

The protection of steel by chrome plating is due to

• Cathodic protection A
• Anodic protection B
• Covering of steel surface C
• Formation of alloy with iron D

Which of the following is explosive:

• Trinitropheonal A
• Nitropheonal B
• Nitromethane C
• Nitrobenzene D

Fossil fuels consist of :

• Coal A
• Natural gas B
• Petroleum C
• All of these D

• Reaction occurs at STP A
• Reaction is exothermic B
• Reaction is endothermic C
• Number of moles of production and reactant are same D

50 mL of 10 N H₂SO₄. 25mL of 12 N Hcl and 40 mL of 5N HNO₃are mixed and the volume of the mixture is made 100 mL by adding water. The normality of resulting will be

• 1 N A
• 2 N B
• 3 N C
• 9 N D

The most acidic of the following compounds is

• P₂O₃ A
• Sb₂O₃ B
• B₂O₃ C
• As₂O₃ D

Coordination number of Pt in [PtCl (NO²) (NH³)⁴]^2-

• 2^- A
• 4 B
• 1 C
• 6 D

How many cm³of 1 M H₂SO₄required to neutralize 10 cm³of 1 M NaOH

• 2 cm³ A
• 2.5 cm³ B
• 5 cm³ C
• 10 cm³ D

Which among the following species has the highest ionization energy?

• Ne A
• F B
• Li C
• B D

An azeotropic mixture showing it's positive deviation from Raoult's law, the volume of the mixture is :

• Slightly more than the total volume of the components. A
• Slightly less than the total volume of the components. B
• Equal to the total volume of the components. C
• None of these. D

Spectrum of white light is continuous becuase

• Colors separated by dark spaces A
• There are no boundary lines between the colours B
• The radiations are in infrared region C
• The radiatins fall in ultraviolet region D

A balloon contains 0.02 gram of H₂gas, it contains H₂molecules

• 6.02 x 10²³ A
• 3.01 x 10²² B
• 6.02 x 10²¹ C
• 3.01 x 10²¹ D

Orbitals having same energy are called

• Hybrid orbitals A
• Valence orbitals B
• Degenerate orbitals C
• D-orbitals D

The rate of forward reaction is two times that of the reverse reaction at a given temperature and identical concentration, K equilibrium is

• 0.5 A
• 1.5 B
• 2.5 C
• 2.0 D

An aqueous solution is neutral when its

• pH = 14 A
• pH = zero B
• pH = 7 C
• Kw = 10^-7 D

For which one of the following pairs of compounds can the members be distinguished by means of Tollen's test

• HCHO and CH₃CHO A
• CH₃CHO and CH₃COCH B
• CH₃COCH₃and C₆H₅COCH₃ C
• CH₃COOH and CH₃COOCH₃ D