ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

For a given process, the heat changes at constant pressure (q_p) and at constant volume (q_v) are related to each other as

• q_p= q_v A
• q_p< q_v B
• q_p< q_v C
• q_p= qv/2 D

The digestion of fats in the intestines is aided by

• Diffusion A
• Protection B
• Peptization C
• Emulsification D

All the following decompose easily on heating to give oxygen except

• Lead nitrate A
• Potassium chlorate B
• Mercuric oxide C
• Manganese dioxide D

The atom of an element is

• The smallest particle A
• The fundamental particle B
• The independent particle C
• The charged particle D

Which have better penetrating power

• Alpha rays A
• Beta rays B
• Gamma rays C
• X-rays D

If carbon dioxide is bubbled through solution of Grignard's reagent in ether and the resultant product is reacted with hydrochloric acid, it gives

• An alkane A
• Al alcohol B
• A carboxylic acid C
• An aldehyde D

Three sp²hybrid are co-planar at an angle of

• 104.5° A
• 109.5° B
• 107° C
• 120° D

Which bond shows maximum hydrogen bonding with water?

• CH₃OH A
• C₂H₅OH B
• CH₃----O----CH₃ C
• C₆H₅OH D

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

Benzene is not prepared from

• Acetylene A
• Phenol B
• Benzoic acid C
• Bromo benzene D

Butyric acid was named from butyrum means:

• Red out A
• Vinegar B
• Butter C
• Milk D

The hybirdization in benzene is:

• sp³ A
• sp² B
• sp² C
• dsp² D

96500 C electricity is passed through CuSO₄. The amount of copper precipitated is

• 0.25 mole A
• 0.5 mole B
• 1.0 mole C
• 2.00 mole D

The pH of 10^-3mole dm^-3of an aqueous solution of H₂SO₄is

• 3.0 A
• 2.7 B
• 2.0 C
• 1.5 D

Identify the compound formed, when ethylene combines with water in the presence of 10% sulphuric acid and HgSO₄as catalyst

• Carbinol A
• Methanol B
• Ethanol C
• Glycol D

The three dimensional folding and twisting of a polypeptide chain give rise to

• Primary structure A
• Secondary structure B
• Tertiary structure C
• All of these tertiary D

The clotting time of blood is increased due to the deficiency of

• Vitamin A A
• Vitamin K B
• Vitamin D C
• Vitamin C D

Contamination of water of tanning industries is due to:

• Cr(III) A
• Cr(VI) B
• Mn(III) C
• Mn(VII) D

The solubility product of Ca(OH)₂is 6.5 x 10^-6. The concentration of OH^-ions is

• 1.175 x 10^-2 A
• 2.35 x 10^-2 B
• 3.25 x 10^-3 C
• 3.25 x 10^-4 D

Chromyl chloride and toluene react to produce

• p-chlorotoluene A
• Benzaldehyde B
• Benzyl chloride C
• Bezoic acid D

Which is a protein?

• Nylon A
• Rayon B
• Natural silk C
• Terylene D

Which of the statements given below concerning properties of solution, describe a colligative effect?

• Boiling point of pure water decreases by the addition of ethanol A
• Vapour pressure of pure water decreases by the addition of nitric acid B
• Vapour pressure of pure benzene decreases by the addition of naphthalene C
• Boiling point of pure benzene increases by the addition of toluene D

The electronic configuration of an atom/ion can be defined by the following

• Aufbau principle A
• Pauli's exclusion principle B
• Hund's Rule C
• All the above D

Which of the following gives iodoform on heating with a solution of I₂containing Na₂CO₃?

• Ethyl alcohol A
• Acetone B
• Ethyl alcohol as well as acetone C
• Methyl alcohol D

Aldehyde and small methyl ketones form crystalline ______ ppts with saturated sodium bisulphate solution

• White A
• Red B
• Yellow C
• None of these D

According to Lewis concept ethers behave as:

• Acid A
• Base B
• Acid as well as a base C
• None of them D

The volume occupied by 1.4 g of N₂ at S.T.P is

• 2.24 dm³ A
• 22.4 dm³ B
• 1.12 dm³ C
• 112 cm³ D

Acylation of benzene to produce aliphatic aromatic ketones is known as:

• Friedel Craft's reaction A
• Benzene condensation B
• Hydroformylation C
• Cellemense
  D

• First order A
• Pseudo first order B
• Second order C
• Zero order D

4-d series is in the period:

• 4th A
• 5th B
• 6th C
• 7th D