ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

The uncertainty principle was stated only

• De Brogilie A
• Heinsenberg B
• Einstein C
• Schrodinger D

Which reaction yields Bakelite?

• Urea with HCHO A
• Tetramethyl glycol with Hezamethylene diisocyanate B
• Phenol and HCHO C
• Ethylene glycol and Dimethylterephthalate D

pH of water is 7, if 0.01 M NaOH is added, than its pH is

• 12 A
• 14 B
• zero C
• 10 D

The reaction of aromatic acyl chloride and phenol in the presence of a base NaOH or pyridine is called

• Kolbe's reaction A
• Perkin's reaction B
• Sandmeyer's reaction C
• Schotten Baumann reaction D

Catalytic oxidation of alkanes is used for the preparation of

• Adehydes A
• Ketones B
• Fatty acid C
• Carbonyylic acids D

The element caesium bears resemblance with:

• Ca A
• Cr B
• Both of the above C
• None of these D

The wave number of the line emitted is 109.678 x 10⁵m^-1in the Lyman series when electron transition occurs

• 
  A
• 
  B
• 
  C
• 
  D

Where lime is not used

• In refining or metals A
• In paper industry B
• In glass industry C
• In the preparation of NaOH D

Hydrolytic reaction of fats by causic soda is known as

• Acetylation A
• Carboxylation B
• Esterification C
• Saponification D

When alkyl halide is heated with aqueous solution of ammonia at 100°C the major product is

• Primary amine A
• Secondary amine B
• Tertiary amine C
• Mixture of amines and salt D

The movement of solvent molecules through a semipermeable membrane is called

• Electrolysis A
• Electrophoresis B
• Osmosis C
• Cataphoresis D

Oxidation state of fluorine is

• +1 A
• +2 B
• -1 C
• -2 D

Hydrides are:

• Ionic A
• Covalent B
• Intermediate C
• All above D

The simplest separating unit of a polymer is called:

• Monomer A
• Dimer B
• Trimmer C
• Macromer D

Which of the following is not an element?

• Graphite A
• Diamond B
• 22-Carat gold C
• Rhombic sulphur D

The three dimensional folding and twisting of a polypeptide chain give rise to

• Primary structure A
• Secondary structure B
• Tertiary structure C
• All of these tertiary D

• Low pressure A
• High pressure B
• High temperature C
• High concentration of SO₂ D

In the extraction of iron, slag is produced which is

• CO A
• FeSiO₃ B
• MgSiO₃ C
• CaSiO₃ 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

When the electron jumps form second third, fourth orbit to the fist orbit, the transitions are known as

• Balmer series A
• Lyman series B
• Pfund series C
• Brackett series D

Carboxylic acids are reduced to in presence of NaAIH₄

• Esters A
• Acetyl chloride B
• alcohol C
• Aldehydes D

The heat energy change during a chemical reaction at constant pressure and at a given temperature is called

• Change in internal energy A
• Enthaply change B
• Temperature change C
• Work done by the system D

Which of the following is a water soluble vetamin?

• Niacin A
• Riboflavin B
• Trypsin C
• Ascorbic acid D

Which of the following reagent will react with both aldehyde and ketones?

• Grinard's reagent A
• Tollen's reagent B
• Fehling's reagent C
• Benedict's reagent D

The lanthanides contraction is responsible for the fact that

• Zr and Y have about the same radius A
• Zr and Nb have similar oxidsation state B
• Zr and Hf have about the same radius C
• Zr and Zn have the same oxidation satete D

The element with highest electron affinity among the halogen is

• F A
• Cl B
• Br C
• I D

Which is present as a result of radioactive decay on earth?

• He A
• Ne B
• Ar C
• Kr D

Fe can displace Cu form CuSO4solution because

• Fe is ferromagnetic A
• Fe is below Cu in electrochemical series B
• Fe is above Cu in electrochemical series C
• Fe exists in divalent oxidation state D

Glutamic acid, aspartic acid are ______ amino acid

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

Which of the following statements is incorrect about vitamins

• Often function as coenzymes A
• Molecules contain at least one ring structure B
• Are often synthesized by the body C
• Are polyfunctional compounds D