ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Which one of the following is used as antifreeze in the radiator

• Methanol A
• Ethanol B
• Ethylene glycol C
• Glycerin D

Two or more similar monomers combine to form:

• Homopolymer A
• Copolymer B
• Ter polymer C
• Thermoplastic polymers D

• Plank's equations A
• de Broglie's equations B
• Heisenburg's equation C
• None D

Carboxylic acids on complete reduction in the presence of Hi and red phosphorus gives:

• Esters A
• Alcohols B
• Alkanes C
• Aldehydes D

Used in tooth pastes is

• Fluorides A
• Iodides B
• halides C
• nitrides D

Tetrabromoethane on treatment with alcoholic zinc gives

• Ethylbromide A
• Ethane B
• Ethene C
• Ethyne D

Etherification is catalyzed by

• Acids A
• Gases B
• Salts C
• None of the these D

Which is more active ?

• Alkanes A
• Alkenes B
• Alkynes C
• Benzene D

Lactic acid on heating with dil. H₂SO₄gives

• Acetic acid A
• Propionic acid B
• Acrylic acid C
• Formic acid D

Which statement is true for Na and Na⁺

• Both have equal sizes. A
• Both have same properties. B
• Size of Na is smaller than Na⁺ C
• Size of Na is greater than Na⁺ D

The rules which describe the distribution of electron in atomic energy levels are Auf-ban principle, Pauli's exclusion principle. Hunds rule. The pauli exclusion principle refers to the

• Orientation of orbital in space A
• Fact that two electrons in the same orbital should have opposite spins B
• Energy of the orbital C
• Spin of the electron D

The fibre which contains polymers of vinylidine chloride as fibre forming substance is known as

• Saran fibre A
• Nylon B
• Polyester C
• Acetate fibre D

Molarity of pure water is :

• 33.3 A
• 55.5 B
• 44.4 C
• 66.6 D

Which is true about the electronegativity order of the following?

• P > Si A
• C > N B
• Br > Cl C
• Sr > Ca D

Fluted filter paper is used to :

• Decrease rate of filtration. A
• Increase rate of filtration. B
• Maintain rate of filtration. C
• None of above. D

Which is used to remove air bubbles form metals?

• B A
• Be B
• Mg C
• Al D

In macromolecules DP stands for

• Dissociation parameter A
• Dissociation polymer B
• Degree of polymerization C
• None of these D

Give IUPAC name fo Acetone

• Ethanal A
• Propanone B
• Butanone C
• Propanal D

In Tolten's best, the end product is ______ formed

• White ppts A
• Red ppts B
• Yellow ppts C
• Silver mirror D

Acetamide is prepared by:

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

which one of the following is a heteroheneous catalysis

• 
  A
• 
  B
• 
  C
• 
  D

Poly hydroxyl compounds of aldehyde ketones are:

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

In a heterollytic bond fission reaction

• A molecule of H₂O is formed A
• A molecule of H₂O is eliminated B
• A free radical is formed C
• A positive and a negative ion is formed D

K,Ca and Li metals may be arranged in decreasing order of their reduction potential as :

• Li, k, Ca A
• Ca, K, Li B
• Li, Ca, K C
• K, Ca, Li D

When electron jumps from n₂= 2,3,4,5,.... orbit to n₁= 1 orbit in the hydrogen atom, the radiations emitted give the spectral lines

• Lyman series A
• Blamer series B
• Paschen series C
• Brackett series D

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

• 10,000 A
• 20,000 B
• 100,000 C
• 50,000 D

• -1.10 V A
• +1.10 V B
• -0.42 V C
• +0.42 V D

Urea has concentration when prepared before prlilling:

• 46% A
• 82% B
• 99.7% C
• 100% D

Generally electron affinities for elements in a period from left to right

• Decreases A
• Increases B
• Remain same C
• Increases alternatively D

Teflon, styron and neoprene are all

• Copolymers A
• Condensation polymers B
• Homopolymers C
• Monomers D