ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

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

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

Which of these always applies to a nucleophile

• It attacks a double bond A
• It has a lone pair of electrons B
• It is single atom C
• It is negatively charged D

Primary alcohols and aldehydes are oxidized to corresponding:

• alkanes A
• alkenes B
• Alkynes C
• Carboxylic Acid D

There are 20α-amino acids found in protein 19 have -- NH₂as the amino group. Only one of theα-amino acids has a secondary amino group which one is this

• Glycine A
• Lysine B
• Proline C
• Cystein D

All reactions occur in :

• A single step. A
• A series of steps B
• Two steps. C
• Both (a) and (b) D

Heating a mixture of sodium benzoate and soda lime gives

• Methane A
• Benzene B
• Sodium bezoate C
• Calcium benzoate D

Colour of Iodine is

• Pale yellow A
• Greenish yellow B
• Red brown C
• Greyish black D

An aqueous solution is neutral when its

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

Among the following, poly cyclic compound is:

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

The shape of CIO^-₃according to valence shell electron pair repulsion theory will be

• Planar triangle A
• Pyramidal B
• Tetrahedral C
• Square planar D

Camphor is often used in molecular mass determination because

• It is solvent for organic substances A
• It is readily available B
• It has a very high cryoscopic constant C
• It is volatile D

The periodic function of properties of elements is their atomic number

• Al-Razi A
• Mosley B
• Newland C
• Mendeleev D

Which of the following will have the highest boiling point

• Methanol A
• Ethanol B
• Propanal C
• 2-hexanone D

Synthesis of rubber is made by polymerization of

• Chloroform A
• Acetylene B
• Divinylacetylene C
• Butene D

Alcohol reacts with halogen acid to produce

• Alkyl halides A
• Aldelydes B
• Ketones C
• Alkanes D

E.N. Value of fluorine is:

• 2.1 A
• 2.5 B
• 3.5 C
• 4.0 D

I₂O₅is used for quantitative study of

• CO₂ A
• NO₂ B
• NO C
• CO D

Which statement is not correct

• Enzymes catalyst a specific reaction A
• Enzymes show catalytic activity at a specific temperature B
• The catalytic activity of enzymes is stopped if optimum pH is changed C
• The catalytic activity is poisoned by a co-enzymes D

Among the nitrogen containing fertilizer, the one with about 82% nitrogen content is

• Ammonium nitrate A
• Ammonia B
• Ammonium phosphate C
• Ammonium sulphate D

Which of the following has ester linkage?

• Nylon A
• Bakelite B
• Terylene C
• PVC D

Down's cell is used to prepare

• Sodium carbonate A
• Sodium bicarbonate B
• Sodium metal C
• Sodium hydroxide D

A bond between two atoms may be obtained by sharing of electrons such a bond is called

• An ionic bond A
• A coordinate bond B
• A dative bond C
• A covalent bond D

The valence shell electronic structure of an element is ns²np⁵. The element will along to the group of

• Alkali metals A
• Inert metals B
• Noble gases C
• Halogen D

Ethyl alcohol prepared during fermentation is pure:

• 20% A
• 10% B
• 11% C
• 12% D

Which one of the following has been hydroxyl and carboxylic acid groups

• Phenols A
• Picric acid B
• Phthalic acid C
• Salicylic acid D

• [A] = [B] A
• [A] < [B] B
• [B] = [C] C
• [A] > [B] D

A zero order reaction is one in which :

• Rate is not affected by changing concentration of reactants. A
• concentration of reactants do not change with the passage of time. B
• Reactants do not react. C
• One reactants in large excess. D

Polyanion formation is maximum in

• Nitrogen A
• Oxygen B
• Sulphur C
• Boron D

Hydrolysis of potassium acetate produces

• Acidic solution A
• Neutral solution B
• Basic solution C
• None of these D

The oxides of which of the following elements will be acidic in character

• Mg A
• Rb B
• Li C
• Cl D