ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

• Primary alkyl halide A
• Secondary alkyl halide B
• Tertiary alkyl halide C
• None of these D

Acetone is prepared by

• Oxidation of n-propyl alcohol A
• Oxidation of acetaldehyde B
• Pyrolysis of calcium acetate C
• Pyrolysis of calcium acetate as well as acetic acid D

In alkynes the bonds between carbon atoms are

• All sigma bonds A
• All pi(π) bonds B
• One is sigma and two areπ(pi) bonds C
• One isπ(pi) and two are sigma bonds D

• Le-chatlier's principle A
• Only adding catalyst B
• Decreasing pressure C
• Decreasing temperature D

Which Statement about gases is not correct?

• They spread throughout the vessel A
• Pressure is due to collision B
• There are larger spaces between the molecules C
• Molecules are arranged regularly D

Molecule of halogens exist as

• Monatomic A
• Diatomic B
• Triatomi C
• Polyatomic D

The malt-sugar in the presence of yeast or invertase gives

• Fructose A
• Glucose B
• Lignin C
• Alcohol D

Select from the following which one is alcohol?

• CH₃-CH₂-OH A
• CH₃-O-CH₃ B
• CH₃COOH C
• CH₂-CH₂-BR D

Tungsten and Uranium are turned to an reaction with HNO₃:

• Oxides A
• chlorides B
• Nitrides C
• Nitrates D

Best way to prevent rusting of iron is by

• Making iron cathode A
• Putting it in saline water B
• Both of these C
• None of these D

All elements of group VI-A non-metal except

• Te A
• S B
• Se C
• Po D

Each vertical column of the periodic table includes elements with chemical characteristics that are in general

• Identical A
• Similar B
• Different C
• Similar as well as different D

In the reaction of oxalic acid with KMnO₄and H₂SO₄is slow at the beginning but after sometimes the reaction becomes faster due to

• Formation of MnSO₄which acts as 'Auto catalyst A
• Formation of CO₂which acts as 'Auto catalyst B
• Formation of K₂SO₄which acts as 'Auto catalyst C
• Evolution of O₂gas which acts as 'Auto catalyst D

The color of ppts formed by Benedirct's test is

• Brick red A
• Wine red B
• Yellow C
• Orange D

In a solution of CuSO₄how much time will be required to precipitate 2g copper by 0.5 ampere current?

• 12157.48 sec A
• 102 sec B
• 510 sec C
• 642 sec D

Element with higher oxidation state form oxides:

• Acidic A
• Basic B
• Ampholetic C
• Peroxides D

Rectified spirit contains alcohol about

• 80% A
• 85% B
• 90% C
• 95% D

Ozone hole refers to

• Hole in ozone layers A
• Reduction in thickness of ozone layer in stratosphere B
• Reduction of thickness of ozone in troposphere C
• Increase concentration of ozone D

Hydrogenation of alkenes/alkynes inthe presence of Ni as catalyst at 3000°C result in the formation of corresponding alkanes. This reaction is known as

• Sabatier-senderens reaction A
• kolbes reaction B
• Cannizaro's reaction C
• Haloform reaction D

A double bond consists of:

• Two sigma bonds A
• One sigma and one pi bonds B
• One sigma and two pi bonds C
• Two pi bonds D

Water shows maximum density at

• 4°C A
• 0°C B
• 100°C C
• -4°C D

Carboxylic acids having carboxyl group one is called:

• Mono carboxylic acid A
• Di-carboboxylic acid B
• Tri carboxilic acid C
• Tetra carboxylic acid D

B-B'-dichloroethyl sulphide is commonly known as

• Mustard gas A
• Laughing gas B
• Phosgene gas C
• Bio gas 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

75% plant nutrients are present in the fertilizer

• urea A
• NH₄NO₃ B
• NH₃ C
• (NH₄)₂HPO₄ D

In Boyle's law which of the following pair is variable

• Temperature and quantity of a gas A
• Pressure and Volume B
• Volume and quantity of a gas C
• Pressure and quantity of a gas D

Fungicides are the pesticides which

• Control the growth of fungus A
• Kill insects B
• Kill plants C
• Kill herbs D

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

• 2^- A
• 4 B
• 1 C
• 6 D

Steps in SN , reactions are:

• One A
• Two B
• Three C
• Four D

95% ethanol is called:

• Rectified other A
• Diesel B
• Rectified spirit C
• Petrol D