ECAT Pre Engineering Chemistry Chapter 6 MCQ Test With Answer

Shape of CIO₃is

• Triangular pyramidal A
• Tetrahedral B
• Triangular planar C
• Triangular bipyramidal D

The equation for the first ionization energy of hydrogen is

• 
  A
• 
  B
• 
  C
• 
  D

Three sp²hybrid are co-planar at an angle of

• 104.5° A
• 109.5° B
• 107° C
• 120° D

Atoms obey octet rule by sharing-electrons making covalent bonds according to

• Lewis and Kossal theory A
• Valance bond theory B
• VSEPR theory C
• Molecular orbital theory D

XeF₄has shape of

• Sphere A
• Trigonal bipyramidal B
• Tetrahedral C
• Square planar D

Which of the following has highest bond order

• 
  A
• 
  B
• 
  C
• 
  D

The electron affinity of chlorine may be represented by the equation

• 
  A
• 
  B
• 
  C
• 
  D

The geometry of 4 sp³hybrid orbitals on an atom is

• Square planar A
• Tetrahedral B
• Trigonal planar C
• Linear D

Noble gases have the electronic configuration with their valance shell ns²np⁶except one

• He A
• Ne B
• Kr C
• Xe D

The shape of the molecule SF₂Cl₂is

• Trigonal bipyradmidal A
• Cubic B
• Octahedral C
• Tetrahedral D

The overlapping of two partially filled atomic orbital is in such a way that the probability of finding the electron pair is maximum along the axis joining the two nuclei, the bond is

• Sigma bond A
• Pi bond B
• Ionic bond C
• Non-polar bond D

Which is made by coordinate covalent bond

• H₃O⁺ A
• H₂O B
• CH₄ C
• HCl D

The force which holds the atoms together to form a compound is called

• A chemical bond A
• Van der waal's force B
• Dispersion force C
• London force D

The bond order of individual C - C bond is benzene is

• One A
• Two B
• Between one and two C
• One and two alternately D

Which of the following hydrides has the lowest boiling point?

• H₂O A
• H₂S B
• H₂S3 C
• H₂Te D

• The ionization energy of A is high and electron affinity of B is low A
• The ionization energy of A is low and electron affinity of B is high B
• Both the ionization energy of A and electron off affinity of B are high C
• Both the ionization energy of A and electron affinity of B are low D

Which of the following molecules have its central atom sp²hybridized

• CH₄ A
• C₂H₂ B
• C₂H₄ C
• CCl₄ D

The bond order in No is 2.5 while that in NO⁺is 3.Which of the following statements is true for these two species?

• Bond length in NO⁺is greater than in NO A
• Bond length in unpredictable B
• Bond length in NO⁺is equal to that in NO C
• Bond length in NO is greater than in NO⁺ D

Number of sigma bonds in P₄O₁₀is

• 6 A
• 7 B
• 17 C
• 16 D

In H₂O molecule the bond angle is

• 90° A
• 109.5° B
• 107° C
• 104.5° D

Which of the following has polar bond

• O₂ A
• N₂ B
• HCl C
• Cl₂ D

The number of antibonding electron pairs in O^2-molecular ion on the basis of MOT is

• 4 A
• 3 B
• 2 C
• 5 D

Which of the following has unchanged valency?

• H A
• Na B
• Fe C
• Oxygen D

The covalent bonds are

• Unidirectional A
• Bi-directional B
• Non-directional C
• Multi-directional D

Water H₂O is liquid while hydrogen sulphide H₂S is a gas beause

• Water has higher molecular weight A
• Hydrogen sulphide is a weak acid B
• Sulphure has high electronegativity than oxyhe C
• Water molecules associate through hydrogen bonding D

The number of electron pairs shared in carbon tetrachloride molecule is

• 2 A
• 3 B
• 4 C
• 1 D

Which one of these is weakest?

• Ionest bond A
• Covalent bond B
• Metallic bond C
• Van der Waal's forces D

Outer shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be

• XY A
• X₂Y B
• X₂Y₃ C
• XY₂ D

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

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

SnCI₂have ______ shape

• Planner A
• Tetrahedral B
• Angular C
• None D