ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Which compound shows hydrogen bonding

• C₂H₆ A
• C₂H₅CI B
• CH₃- O - CH₃ C
• C₂H₅OH D

Which of the following fertilizers is useful for paddy rice

• Ammonium nitrate A
• Ammonium sulphate B
• Urea C
• Ammonium chloride D

II-A group element are called:

• s-block elements A
• p-block elements B
• d-block elements C
• f-block elements D

Atomic radius changes from top to bottom in a group.:

• Increases A
• Decreases B
• Remains same C
• Sometimes increases & Decreases D

The ph of 10-3 mole dm-3 of an aqueous solution of H₂SO₄ is :

• 3.0

  A

• 2.7

  B
• 2.0 C

• 1.5

  D

Which of the following groups will increase the acidity of phenol?

• -NO₂ A
• -CN B
• -X (halogens) C
• All D

Chemistry related to the study of environment affected by the chemicals and pollutants is called:

• Biochemistry A
• Physical chemistry B
• Pharmaceutical chemistry C
• Environmental chemistry D

Benzene acid can be prepared from the oxidation of:

• benzene A
• ethyl benzene B
• benzonic acid C
• toluene D

β-D-glucose is a monomer for

• Strach A
• Cellulose B
• Glycogen C
• Protein D

The most stable phosphorus allotrope is

• White A
• Red B
• Black C
• All D

The region of earth capable of supporting life is

• Hydrosphere A
• Lithosphere B
• Biosphere C
• Atmosphere D

The sample being analyzed is called :

• Electrolyte. A
• Substance. B
• Analyte. C
• All of above. D

Which of the following geometry is associated with the compound in which the central atom assumes sp³d hybridization?

• Planar A
• Pyramidal B
• Angular C
• Trigonal bipyramidal D

SO₂Makes ______ acid rains

• Carbonic acid A
• Sulfuric B
• Nitric acid C
• All of these D

Generally ionization energy of atoms decreases by

• Decreases in atomic size A
• Increase in atomic size B
• Increase in nuclear charge C
• None of these D

C₆H₆Cl₆can be obtained from

• HCl and Benzene A
• Cl₂and Benzene and AlCl₃ B
• Cl₂and Benzene in diffused light C
• NaOCl and Benzene D

Which alkaline earth metal makes peroxide?

• Be A
• Mg B
• Ca C
• Ba D

The weight of pure NaOH required to prepare 250 cm³of 0.1 N solution is

• 4 g A
• 1 g B
• 2 g C
• 5 g D

Bleaching powder is prepared by the reaction of Cl₂ with.

• Lime stone A
• Lime water B
• slaked lime C
• Lime D

• Acidic amino acid A
• Basic amino acid B
• Neutral amino acid C
• None of these 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

Weakest acid among the followings is

• Acetic acid A
• Phenol B
• Water C
• Acetylene D

On passing HCI gas through a saturated solution of commercial sodium chloride, pure crystals of NaCI are precipitated due to

• Increase in pH of the solution A
• Decrease in pH of the solution B
• Common ion effect C
• Increase in ionization of NaCl D

Polysaccharides are also called

• Crystals A
• Sugars B
• Liquids C
• None sugars D

HF has exceptionally low acidic strength due to:

• Smaller size of fluorine. A
• Stronger polar bond between H and F. B
• Electronegativity of fluorine C
• Strong hydrogen bonding D

The solution of which acid is used for seasoning of food

• Formic acid A
• Acetic acid B
• Benzoic acid C
• Butanoic acid D

Odour of alkene is:

• Fruity A
• Odourless B
• Zarlic like C
• Irritating D

Cement plaster is made by mixing plaster of paris with:

• glue or oil A
• gypsom B
• glycol C
• alum or borax D

In purification of potable water the coagulant used is

• Nickle sulpahte A
• Copper sulpahte B
• Barium sulpahte C
• Alum D

A reaction is reversible because :

• Products are stable. A
• Reactants are reactive. B
• Products are reactive. C
• Reactants re stable. D