ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

• 
  A
• 
  B
• 
  C
• 
  D

In a primary alkyl halide, the halogen atom is attached to a carbon which is further attached to

• Only one carbon atom A
• Two carbon atoms B
• Three carbon atoms C
• one or no carbon atom D

How is the secondary structure of protein stabilized

• Through hydrogen bonding A
• Through ionic bonding B
• Through van der wall forces C
• Through covalent bonding D

Which will have the maximum value of heat of hydration

• Na⁺ A
• Cs⁺ B
• Ba⁺² C
• Mg⁺² D

Among group V-A elements, the most electronegative element is:

• Sb A
• N B
• P C
• As D

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

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

According to Le-Chatelier's principal, adding heat to a solid and liquid in equilibrium will cause the

• Amount of solid to decrease A
• Amount of liquid to decrease B
• Temperature to rise C
• Temperature to fall D

Oxidation of ter-alcohol gives:

• Aldehyde A
• Formaldehyde B
• Ketone C
• Alkens D

The shape of gaseous SnCl₂is

• Tetrahedral A
• Linear B
• Angular C
• T-shaped D

Silk is an example of

• Animal fiber A
• Vegetable fibre B
• Mineral fibre C
• None of these D

Sulphuric acid reacts with PCl₅to give

• Thionyl chloride A
• Sulphur monochloride B
• Sulphuryl chloride C
• Sulphur tetrachloride D

A transition element is defined as an element of 3d series

• Which is metal A
• Which has one stable ion B
• Which has two stable ions C
• Which has at least one stable ion with incomplete d-orbital D

Hydrolysis of potassium acetate produces

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

Which of the following is used as anesthetics

• Alcohol A
• Diethylether B
• Phenol C
• Dimethyl ether D

The divisibility of atom was shown by

• Stoney A
• J.J. Thomson B
• Millikan C
• Rutherford D

Which of the following is present in the stings of bees and wasps

• Formic acid A
• Citric acid B
• Carbolic acid C
• Formalin D

Which of the following sulphates is not soluble in water

• Sodium sulphate A
• Potassium sulphate B
• Zinc sulphate C
• Barium sulphate D

Pure water does not conduct electricity because it

• Has low boiling point A
• Is almost unionized B
• Is neutral C
• Is readily decomposed D

The organic compounds containing Ph--OH group are called:

• Phenol A
• Aldehyde B
• Ketones C
• Carboxylic acids D

In Lucas test teriary alcohol make an oily layer

• Immediately A
• In 10 mins B
• On heating C
• Not D

Hydrolysis of ethyl-acetate (ester) has order of reaction :

• 3 A
• 2 B
• 1 C
• 1 D

Amorphous solids

• Have sharp melting point A
• Undergo clean cleavage when cut with knife B
• Have perfect arrangement of atoms C
• Can possesses small regions of orderly arrangement of atoms D

• -778.9 KJ A
• 788.0 KJ B
• -1.9 KJ C
• +1.9 KJ D

Covalent compound s mostly exist in the form of:

• Protons

  A

• Atoms

  B
• Neutrons C

• Molecules

  D

Ionic radius, in a period from left to right

• Increases A
• Decreases B
• Decreases then increases C
• Increases and decreases D

Picric acid is

• 2, 4, 6-Trinitrotoluene A
• 2, 4, 6-Tribomoethanol B
• 2, 4,6-Trinitrophenol C
• Para-Nitrophenol D

Fungicides are the pesticides which:

• Control the growth of fungus A
• Kill insects B
• Kills plants C
• Kills herbs D

Ionic Solids are characterized by

• Low melting points A
• Good conductivity in solid state B
• High vapour pressure C
• Solubility in polar solvents D

The electrolysis of CuSO₄aqueous solution using copper as cathode as well an anode the substance which deposits at cathode is

• H₂SO₄ A
• Oxygen B
• Copper C
• Hydrogen D

Which of the following is a transition element

• Sr A
• Sn B
• Cr C
• Pb D