ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

CO+ is an example of

• Stable molecule A
• Anionic molecule ion B
• Cationic molecular ion C
• Free radical D

Enzymes catalyse all biological reactions occurring in the cell. What is true about an enzyme

• Enzyme is a small molecule A
• Enzyme is acidic in nature B
• Enzyme is a protein C
• Enzyme is a lipid D

Chemical composition of colemnite is:

• Ca₂B₆O₁₁.5H₂O A
• CaB₄O₇ .4 H₂O B
• Na₂B₇O₇. 4 H₂O C
• CaNaB₅O₉.8H₂O D

Ammonium nitrate fertilizers is not used for which crop?

• Cotton A
• Wheat B
• Sugar-cane C
• Paddy rice D

Which of the following salt is used as purgative

• CaSO₄ A
• MgSO₄ B
• BeSO₄ C
• NaCl D

Use of glycol as anti freeze in the automobile is an important application of

• Colligative property A
• Raoult's law B
• Fractional crystallization C
• Prrhenivs law D

Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?

• Carbon monoxide A
• Diamond B
• Ethane C
• Methane D

One mole of ethanol and one mole of ethane have an equal

• Mass A
• Number of atoms B
• Number of electrons C
• Number of molecules D

Glutamic acid, aspartic acid are ______ amino acid

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

Oxidation of NO in air produces

• N₂O A
• N₂O₃ B
• N₂O₄ C
• N₂O₅ D

• N₂O₄is limiting reactant A
• N₂H₄is the limiting reactant B
• Reactants are completely converted to the products C
• Reactions is reversible 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

Alkanes normally have ______ hybridization

• Sp A
• Sp² B
• Sp³ C
• d sp³ D

Each of the following is true of white and red phosphours except that they

• Are both soluble in CS₂ A
• Can be oxidized by heating in air B
• Consist of the same kind of atoms C
• Can be converted into one another D

When a compound X is passed through a dilute alkaline solution of KMnO₄the pink colour of solution is discharged. The compound X is possbibly

• Methane A
• Ethane B
• Ethene C
• Benzene D

During reaction of O₂and alkenes, a product:

• Glycol A
• Epxide B
• Halohydrin C
• Ethylene glycol D

Hydrolysis of alkyl nitriles gives:

• alkane A
• alkyl halide B
• alkyl nitride C
• carboxylic acids D

Coordination number of Pt in [PtCI(NO₂) (NH₃)₄]²⁺is

• 2- A
• 4 B
• 1 C
• 6 D

According to Raoult's law

• Relative lowering of V.P. is equal to mole fraction of solute A
• The lowering of V.P. is directly proportional to mole fraction of solute B
• V.P. of solvent above solution is equal to product of V.P. of pure solvent and mole fraction of solvent ins solution C
• All of the above D

The movement of solvent molecules through a semipermeable membrane is called

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

• RCH(CH₃)CO₂H + CH₃OH A
• RCH(CH₃)CO₂H + HCO₂H B
• RCH(CH₃)OH + CO₂ C
• RCH(CH₃)OH + HCO₂H D

In azeotropic mixture showing negative deviation form Raoult's law show

• Higher b.p. than either A
• Lower b.p. than either B
• No change in b.p. C
• None of these D

• 2-bromonitrobenzene A
• 2-nitrobromobenzene B
• 1-bromonitrobenzene C
• 1-nitrobromobenzene D

Lime is often used as an agent:

• dehydrating A
• hydrating B
• oxidizing C
• reducing D

• Cu A
• H B
• N C
• O D

The 95.5% mass of Lithosphone is made of 11 elements i.e. O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. which element is present in trace amount

• Iodine A
• Bromine B
• Lead C
• Carbon D

When aqueous solution of NaOH is electrolysed useing graphite electrodes, the product obtained at anode is

• O₂gas A
• H₂gas B
• Na metal C
• Na₂O D

Which metal is used in the thermit process because of its activity?

• Iron A
• Copper B
• Alumnium C
• Zinc D

Commercial common salt becomes slight damp on storing because

• Common salt is hygroscope A
• Common salt contains some impurity, which is hygroscopic B
• Salt in efflorescent C
• Salt is crystalline D

In the expression rate = K [A]^a[B]^bK is

• The order of reaction A
• The speed of reaction B
• The specific rate constant C
• The overall order of reaction D