ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

Aldelydes are the oxidation product of

• P-alcohols A
• s-alcohols B
• ter-alcohols C
• carboxylic acids D

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

• cotton A
• Bagasse B
• Popular C
• Rice straw D

Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :

• 1/2 A
• 8/9 B
• 1/9 C
• 16/17 D

The electrophile in aromatic sulphontion is:

• H₂SO₄ A
• HSO₄ B
• SO₃ C
• SO₃₊ D

Ozone depletion in stratosphere shall result in

• Forest fires A
• Increased incidence of skin cancer B
• Global warming C
• None of the above D

Which of the following hydrogen halide is the weakest acid in solution

• HF A
• HBr B
• HI C
• HCl D

Heat absorbed or released during the chemical reaction of physical process at constant pressure is equal to

• 
  A
• 
  B
• 
  C
• 
  D

An electrochemical cell is based upon

• Acid-base reaction A
• Redox reaction B
• Nuclear reaction C
• None of the above D

A reaction will also be called a spontaneous if

• It does not need energy to start with A
• It needs energy to carry the whole process B
• It needs energy at the end of reaction C
• It needs energy to start with D

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

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

Bell metal is an alloy of Sn and

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

Which is not true about acetophenone?

• Reacts to form 2,4-dintrophenyl hydrazine A
• Reacts with Tollen's reagent to form silver mirror B
• Reacts with I₂/NaOH to form iodoform C
• On oxidation with alkaline KMnO₄followed by hydrolysis gives benzoic acid D

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

Which of the following is an example of ketohexose?

• Mannose A
• Galactose B
• Maltose C
• Fructose D

• Neutrons are attracted by nucleus A
• Neutrons carry out nuclear reactions B
• Neutrons carry no charge C
• Neutrons are electromagnetic radiations D

Micro-nutrients are required in quantity ranging from

• 4g-40g A
• 6g-200g B
• 6Kg-200Kg C
• 4Kg-40Kg D

Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?

• Chlorination, nitration, reducing A
• Nitration, chlorination, reducition B
• Nitration, reduction,chlorination C
• Nitration, reduction, acylation, chlorination, hydrolysis D

On adding sodium nitroprusside ketones give

• Red A
• Wine red B
• White C
• Orange D

Which of the following fluorides does not exists?

• NF₅ A
• PF₅ B
• AsF₅ C
• SbF₅ D

empirical formula mass of benzene is time lesser than moleculer formula mass:

• four A
• five B
• six C
• seven D

Easter are pleasant smelling compounds. Which ester posseses odour like pineapple

• Amylacetate A
• Amylbutyrate B
• Ethylbutyrate C
• Benzylacetate D

Carboxylic acids on complete reduction in the presence of Hi and red phosphorus gives:

• Esters A
• Alcohols B
• Alkanes C
• Aldehydes D

The ratio of moles of a particular component of solution to total moles of all components of solution is :

• Mole fraction. A
• Molality. B
• Molarity. C
• Normality. D

Smell of halogens is:

• Fruity A
• Sweet B
• Irritating C
• Rotten egg D

The molarity of the solution containing x grams (NH₄)₂SO₄in 500 cm³of the solution is 0.6 what is x

• 39.6 A
• 45.1 B
• 40.5 C
• 42.7 D

Photochemical smog is caused by

• CO A
• CO₂ B
• O₃ C
• NO₂ D

The percentage of H is the highest in

• CH₄ A
• NH₃ B
• H₂SO₄ C
• C₆H₁₂O₆ D

An electric current is passed through silver nitrate solution using silver electrodes.10.79 g of silver was found to be deposited on the cathode if the same amount of electricity is passed through copper sulphate solution using copper electrodes, the weight of copper deposited on the cathode is

• 6.4 g A
• 2.3 g B
• 128.8 g C
• 3.2 g D

The stroids of fungi and yeast and yeast are called:

• Vitamin D A
• Vitamin D₂ B
• Ergostrol C
• Cholestrol 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