ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Which of the following has greatest tendency to lose electron?

• F A
• Fr B
• S C
• Be D

Hydrogenation of bezoyl chloride in presence of Pd on BaSO₄gives

• Benzyl alcohol A
• Benzaldehyde B
• Benzoic acid C
• Phenol D

How many molecules of chlorine adds in benzene in the presence of sunlight

• One A
• Two B
• Three C
• Four D

Which Amino acid can be synthesized by over body.

• Basic amino acids A
• Acidic amino acids B
• Essential amino acids C
• Non-essential amino acids D

The experimental evidences for the existence of atomic nucleus comes from:

• Line spectrum of hydrogen. A
• Magnetic bonding of cathode rays. B
• Millikan oil drop experiment. C
• Scattering of alpha particles by thin metal foil. D

Gasoline is a mixture of hydrocarbons containing carbon atoms

• 5 to 10 A
• 5 to 8 B
• 5 to 12 C
• 5 to 11 D

Iodoethane reacts with sodium in ether, the product formed is

• Pentene A
• Propyne B
• Butene C
• Butane D

When the solute is present in trace quantities the following expression is used

• Gram per million A
• Milligram percent B
• Microgram percent C
• Parts per million D

In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

• Lowering in b.pt A
• Reducing viscosity B
• Reducing specific heat C
• Lowering in freezing pt D

Sodium metal is obtained by the electrolysis of fused NaCl in cell is called

• Nelson's cell A
• Down's cell B
• Daniell cell C
• Voltaic cell D

Metals which are above SHE in electrochemical series

• Can liberate H₂from acid A
• Cannot liberate H₂from acid B
• Cannot always liberate H₂from acid C
• None of these D

Which alcohol may be oxidised to a product which react with 2,4-dinitorphenylhydrazine reagent but not with Fehling's reagent

• Butan-1-ol A
• Butan-2-ol B
• 2-methylpropan-1-ol C
• 2-methylpropan-2-ol D

Oxidation state of fluorine is

• +1 A
• +2 B
• -1 C
• -2 D

A large value of K_cmeans that at equilibrium :

• Less reactant and more products. A
• Reactants and product in same amounts. B
• More reactants and less products. C
• None of above. D

RNA is a polymer of nucleotide which consist of three components. Which one is not the component in the nucleotide of an RNA

• D-Ribose A
• Wracil base B
• Prosphate group C
• Thyamine base D

Ionic solids are characterized by :

• Low meeting points A
• Good conductivity in solid state B
• High vapor pressure C
• Solubility in polar solvents D

Which if the following has the highest freezing point at one atmosphere

• 0.1 M NaCI A
• 0.1 M sugar solution B
• 0.1 M BaCI₂ C
• 0.1 M FeCI₂solution D

In zero order reaction, the rate is independent of :

• Temperature of reaction A
• Concentration ofreactants B
• Concentration of products C
• None of these. D

All are ortho & Para directing except

• X A
• OH B
• NR₃ C
• NH₂ D

Borax is a common mineral of alkali metal sodium. Its formula is

• Na₂B₄O₇ A
• Na₂,B₄O₇. 10H₂O B
• Na₂B₃O₆. 10H₂O C
• Na₂B₄O₇- 5H₂O D

Mild oxidation of glycerol with H₂O₂/FeSO₄gives

• Glyceraldehyde A
• Dihydroxy acetone B
• Glycerose C
• None D

During the manufacturing process of cement the temperature of the decomposition zone goes up to

• 600^oC A
• 8000^oC B
• 1000^oC C
• 1200^oC D

Which woody raw material is used of the manufacture of paper pulp

• Cotton A
• Bagasse B
• Poplar C
• Rice straw D

• Non polar R group A
• Polar R group B
• Acidic R group C
• Metallic R group D

Which one is a nitrogen fertilizer

• Urea A
• Calcium sulphate B
• Potassium phospahte C
• Magnesium carbonate D

Which element of group IV-A does not use d-orbital?

• N A
• P B
• As C
• Sb D

Direct conversion of solid into vapors is called :

• Crystallization A
• Sublimation B
• Obligation C
• Vaporization. D

Pro stand for

• Valine A
• Alamine B
• Glycine C
• Proline D

Which of the following is not charged particle

• Proton A
• Electron B
• Neutron C
• Hydrogen nucleus D

• Moles^-2dm⁺⁶ A
• No units B
• Mole dm^-3 C
• Mole^-1dm^-3 D