page 5 | Chemistry - DDCET MCQ - Electrical Engineering Objective

Q51. Which of the following molecules contains a coordinate covalent bond?

\(H_2O\)

\(HCL\)

\(NH_3\)

\(CO_2\)

Q52. Molarity (M) is defined as the moles of solute per

liter of solution

kilogram of solution

liter of solvent

kilogram of solvent

Q53. Which of the following molecules is polar?

\(CO_2\)

\(SF_6\)

\(H_2O\)

\(CH_4\)

Q54. A 10% (w/w) solution of \(NaCl\) in water has a density of 1.2 g/mL. What is the mass (in grams) of NaCl in 200 mL of this solution?

27.5

25

2.75

24

Q55. Which factor does NOT significantly influence the rate of dry corrosion?

Temperature

Pressure of the gases involved

Humidity

Surface area of the metal

Q56. What is the molarity (M) of a solution prepared by mixing 50 mL of 0.2 M NaOH with 100 mL of 0.1 M HCl?

0.05 M

0.1 M

0.13 M

0.2 M

Q57. Which factor is NOT a determining factor for classifying a substance as an electrolyte?

Electrical conductivity in aqueous solution

Ability to dissociate into ions in solution

Physical state (solid, liquid, or gas)

Chemical structure of the molecule

Q58. Which of the following statements about hydrogen bonding is NOT true?

It can occur between molecules of the same type.

It is stronger than covalent bonding

It involves a partially positive hydrogen atom attracted to a highly electronegative atom.

It plays a crucial role in biological systems.

Q59. Which of the following factors does not affect the cell potential of an electrochemical cell?

Concentration of the electrolytes

Temperature

Pressure (for gas-phase reactions)

Material of the electrodes

Q60. What characteristic defines a base in the Arrhenius theory?

Donates \(H^+\) ions

Accepts \(H^+\) ions

Releases \(OH^-\) ions

Increases electrical conductivity

MCQ

Chemistry (DDCET)