ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

• 2-chlorobutanal A
• alfa-chlorobutanal B
• 2-chlorobutyraldehyde C
• alfa- chlorobutyraldehyde D

Which of the following is not an element?

• Graphite A
• Diamond B
• 22-Carat gold C
• Rhombic sulphur D

The three N - Hσ-bonds are made by

• sp³- s overlap A
• sp²- s overlap B
• P - p overlap C
• sp - overlap D

According to VSEPR theory, the shape of the water molecule is

• Octahedral A
• Distorted tetrahedral B
• Planar triangle C
• Linear D

The oxidation number of each element of group ll-A is

• 0 A
• +1 B
• +2 C
• -1 D

Permonosulphuric acid is known as

• Marshall's acid A
• Carlo's acid B
• Sulphuric acid C
• None of these D

The rate of reaction determined at a given time is called

• Average rate A
• Instantaneous rate B
• Specific rate C
• Overall rate D

The hybirdization in benzene is:

• sp³ A
• sp² B
• sp² C
• dsp² D

Sodium belongs to block of periodic table:

• S-Block A
• p- block B
• d- block C
• f- bloci D

In liquids, inter molecular force are.

• Very weak A
• Very strong B
• Reasonable strong C
• Rubber D

The element which has a simple cubic lattice in solid state is

• Se A
• Te B
• Po C
• None of these D

The colour of transition metal complexes is due to

• d-d transitions of electrons A
• Para magnetic nature of transition elements B
• Ionization C
• Loss of s-electrons D

Natural fertilizers are materials derived from

• Plants only A
• Animals only B
• Both plants and animals C
• None of these D

Composition of clay in cement is

• 25% A
• 50% B
• 75% C
• 80% D

When SO₂is passed through acidified K₂Cr₂O₇solution

• The solution turns blue A
• The solution is decolourised B
• SO₂is reduced C
• Green Cr₂(SO₄)₃is formed D

If Grignard reagent is allowed to react with another alkyl halide the main product is

• An alkane A
• Cyclo alkane B
• Alkyne C
• An alkene D

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

• four A
• five B
• six C
• seven D

Sodium phenoxide reacts with CO₂at 400 K and 4.7 atm pressure to give

• Sodium salicylate A
• Salicyl aldehyde B
• Catechol C
• Benzoic acid D

Grignard reagent is reactive due to :

• The presence of halogen atom A
• The presence of Mg atom B
• The polarity of C - Mg bond C
• None of them D

Factors affecting quality of water:

• D.O A
• BOD B
• COD C
• All of these D

The general formula of amino acids is

• 
  A
• 
  B
• 
  C
• 
  D

Fluorine molecule is formed by

• The axial p-p overlap A
• The sidewise p-p overlap B
• The axial s-p overlap C
• The overlap of two sp²hybrid orbitals D

Posphorus belongs to a group

• III-A A
• IV-A B
• V-A C
• VI-A D

The substance which is present in large quantity is called a :

• Solute A
• Solvent B
• solutiion C
• None of Above D

Which behaves ass insulator for animals body?

• Carbohydrates A
• Protiens B
• Fats C
• skin D

A combination of glucose and fructose is called:

• Sucrose A
• Table sugar B
• a and b C
• Lactose D

The open chain compounds are also called

• Aliphatic A
• Alicylic B
• Aromatic C
• Both a and b D

Distillation of calcium salts of acetic acid and formic acids gives acetaldehyde. What compound would be obtained if only calcium salt of acetic acid is distilled

• Formaldehyde A
• Butyraldehyde B
• Propionaldehyde C
• Acetone D

Which of the following has highest dipole moment?

• NH₃ A
• PH₃ B
• AsH₃ C
• SbH₃ D

The amount of heat evolved or absorbed by keeping reactants and products at one atmospheric pressure at room temperature is called

• Heat of formation A
• Standard heat of formation B
• Standard enthaply change C
• None D