ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

• Mercury A
• Lead B
• Nitrogen oxide C
• Sulphuric oxide D

Which of the following is a water soluble vetamin?

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

Mottling of teeth is due to presence of an element in drinking water

• Mercury A
• Fluorine B
• Boron C
• Chlorine D

Which is not nitrogeneous fertilizers?

• (NH₄)₂HPO₄ A
• NH₄NO₃ B
• Urea C
• Calcium phosphate D

What causes nitrogen to be chemically inert?

• Multiple bond formation in the molecule A
• Absence of bond distance B
• Short internuclear distance C
• High bond energy D

The example of colligative property is

• Boiling point A
• Osmosis B
• Freezing point C
• Osmotic pressure D

In which of the following theories the hybridizationis considered

• Vsepr A
• Lewis B
• Molecule orbital C
• Valence bond D

The theory of chemical bonding has been a major problem of:

• Modern Physics. A
• Modern Chemistry. B
• Modern Biology. C
• Mechanics. D

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

• It attaches to sulphur of the disulphide link A
• Hg is a heavy metal B
• Hg is liquid at room temperature C
• Hg is non reactive chemically D

Mg becomes isoelectronic with neon when it

• Loses two electrons A
• Gains two electrons B
• Loses 1 electron C
• Gains 1 electron D

Ammonium nitrate fertilizers is not used for which crop?

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

Water which his considered to be safe for human consumption is known as

• Distilled water A
• Contaminated water B
• Potable water C
• Rain water D

The atomic radius increases as we move down a group because

• Effective nuclear charge increases A
• Atomic mass increases B
• Additive electrons are accommodated in new electron level C
• Atomic number increases D

Ethyl chloride on treatment with aqueous alkali gives

• Ethane A
• Ethene B
• Ethanal C
• Ethanol D

The apex angle of the folded filter paper is slightly greater than :

• 60°
  A
• 30° B
• 45° C
• 90° D

A one thousand dm³sample of water contains one gram of iron (iii) ions what is the concentration in parts per million of Fe^3f(eq) in parts per million

• 0.001 A
• 0.01 B
• 0.1 C
• 1.0 D

AgCl is soluble is

• Aqua regia A
• H₂SO₄ B
• HCl C
• NH₃ D

A nucleophilic reagent will readily Attack

• Ethylene A
• Ethanal B
• Ethanol C
• Ethylamine D

The high molecular weight materials which yield on hydrolysis the amino acids is called:

• Carbohydrates A
• Lipids B
• Fatty acids C
• Proteins D

Hydrides are:

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

Which of the following compound is no formed according to octet rule:

• KrF₂

  A

• XeF₂

  B

• XeO₃

  C

• SF₆

  D

The elements like boron, chlorine, cobalt, copper etc are added in small amounts to the soil. They are called

• Macrountrients A
• Trace elemetns B
• Micronutrients C
• Additives D

Which of these polymers is an addition polymer?

• Nylon-6,6 A
• Polystrene B
• Terylene C
• Epoxy resin D

A carboxylic acid containing Ar group in it is called:

• Aromatic carboxylic acid A
• Allphatic carboxylic acid B
• Dicarboxylic acid C
• Carboxylic acid D

Rutherford's experiment led to the discovery of

• Nucleus A
• Electron B
• Proton C
• alpha particle D

• 
  A
• 
  B
• 
  C
• 
  D

Binary compounds of hydrogens are called:

• Halides A
• Hydrides B
• Oxides C
• Nitrides D

Same amount of electric current is passed through solutions of AgNO₃and HCl. If 1.08 g of silver is obtained in the first case, the amount of hydrogen liberated as S.T.P in the second case is

• 112 cm³ A
• 22400 cm³ B
• 224 cm³ C
• 1.008 g D

Isopropyl alcohol on oxidation gives

• Acetone A
• Ether B
• Ethylene C
• Acetaldehyde D

1.0 g pure calcium carbonate was found to require 50 ml of dilute HCl for complete reaction. The strength of HCl solution is given by

• 4 N A
• 2 N B
• 0.4 N C
• 0.2 N D