ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Cannizzaro's reaction in not given by

• Formaldehyde A
• Acetaldehyde B
• Benzaldyhyde C
• Trimethylacetaldehyde D

Which of the following is produced when an aqueous solution of butan-2-ol is refluxed with dil acidified KMnO₄

• Butanol A
• Butanoic acid B
• Butanone C
• Butane D

Theα-carbon of 19 out of 20α-amino acids found in protein is chiral or asymmetric. Hence they are optically active. Only one of the 20α-amino acids is not optically active which one is the

• Proline A
• Glycine B
• Hitidine C
• Alanine D

Which is not a fossil fuel

• Petroleum A
• Coal B
• Natural gas C
• None of them D

Which of the following elements is most metallic?

• P A
• As B
• Sb C
• Bi D

Aqua Regia has ration of conc. HCl and HNO₃.

• 1 : 2 A
• 1 : 3 B
• 1 : 4 C
• 2 : 3 D

Purine derivative among the following bases is

• Thymine A
• Uracil B
• Guanine C
• Cytosine D

Which one of the following statements is not correct

• A molecule is the smallest particle of an element which can exist independently A
• He is a molecule of helium B
• S₈is a molecule of sulphur C
• O₃is a molecule of oxygen D

Calorie is equivalent to :

• 0.4184 J A
• 4184 J B
• 4.184 J C
• 418.4 J D

Organic synthetic or man made polymers are plastics, rubber and fibre. Which is not a synthetic polymer

• Silk A
• Polyester B
• Polyvinyl chloride C
• Nylon D

Which one of the following metal ions is colourless?

• V²⁺ A
• Cr³⁺ B
• Zn²⁺ C
• Ti³⁺ D

Which is the strongest acid?

• HClO A
• HClO₂ B
• HClO₃ C
• HClO₄ D

Ifα us the degree of dissociation of Na₂SO₄the vant Hoff's factor (1) used for calculating the molecular mass is

• 1 +α A
• 1 -α B
• 1 + 2α C
• 1 - 2α D

Which of the following acid can be used as a catalyst in Friedel Craft's reaction?

• AlCl₃ A
• HNO₃ B
• BeCl₂ C
• NaCl D

Energy of electron in first orbit of H atom is

• -45.32 KJ/mole A
• -82.08 KJ/mole B
• -52.53 KJ/mole C
• -1313.31 KJ/mole D

Which following derivative cannot be prepared directly from acetic acid?

• Acetamide A
• Acetyl chloride B
• Acetic anhdride C
• Ethyl acetate D

• The ionization energy of A is high and electron affinity of B is low A
• The ionization energy of A is low and electron affinity of B is high B
• Both the ionization energy of A and electron off affinity of B are high C
• Both the ionization energy of A and electron affinity of B are low D

Reaction of Grignard's reagent with formaldehyde gives:

• pri-alcohol A
• sec-alcohol B
• ter-alcohol C
• carboxylic D

Hydrogen bond is the strongest between the molecules of:

• HF A
• HCl B
• HBr C
• Hl D

General formula of carbocyclic acids is:

• RCOH A
• RCOR B
• RCOOR C
• R-OH D

Which is not state function

• Temperature A
• Enthaply B
• Entropy C
• Internal energy D

The hydroxyl derivatives of aromatic hydrocarbons which have the -OH group directly bonded to the ring C-atom are called

• Alcohols A
• Ketones B
• Esters C
• Phenols D

Which of the following is a tetrabasic acid?

• ORthophosphoric acid A
• Hyposphosphorus acid B
• Metaphosphoric C
• Pyrophosphoric acid D

Colligative properties are the properties of :

• Dilute solutions which behave as nearly ideal solutions. A
• Concentrated solutions which behave as nearly non-ideal solutions. B
• Both(i) and (ii) C
• Neither (i) nor (ii) D

Which of the following has unchanged valency?

• H A
• Na B
• Fe C
• Oxygen D

Kekule structures contributed towards actual structure of benzene

• 60% A
• 70% B
• 80% C
• 90% D

In which reaction, aromatic aldehyde is treated with acid anhydride in the presence of corresponding salt of the acid to give unsaturated aromatic acid?

• Friedel-Crafts reaction A
• Perkin's reaction B
• Wurtz reaction C
• None of these D

• 0.12 A
• 0.50 B
• 0.25 C
• 4.00 D

Chromic acid used to oxidize

• Aldehyde A
• Ketone B
• Both a and b C
• None of these D

With increases in temperature of 10 K of the reacting gases the rate of reaction is doubled because

• Increase in number of collisions A
• Number of molecules having energy more than Ea is doubled B
• Increase in order of reaction C
• Increase in surface area D