page 2 | Chemistry - DDCET MCQ - Electrical Engineering Objective

Q21. The process of oxidation in corrosion involves:

Loss of electrons by the metal

Gain of electrons by the metal

Loss of protons by the metal

Gain of protons by the metal

Q22. The functional group contained in the compound \(CH_2 = CH_2\) is a(n)

ester

ketone

alkene

alcohol

Q23. Which statement is TRUE about viscosity in lubricants?

Thicker oils are suitable only for slow-moving machinery.

Higher viscosity indicates better lubrication for all applications.

Viscosity can change with temperature.

Both A and C are true.

Q24. The arrangement of electrons in an atom is described by the:

atomic number

atomic weight

electron configuration

orbital diagram

Q25. The pour point of a lubricant indicates its:

Ability to withstand high pressure

Temperature at which it begins to solidify

Flash point

Resistance to oxidation

Q26. An atomic weight indicates

no. of neutrons

no. of neutrons ans protons

no. of protons and electrons

no. of electrons

Q27. The second law of electrolysis states that the masses of different substances deposited or dissolved by the same amount of charge are proportional to their

equivalent weights

densities

atomic numbers

molar masses

Q28. The general formula for alkenes is:

\(C_nH_{2n+2}\)

\(C_nH_{2n}\)

\(C_nH_{2n-2}\)

\(C_nH_{2n-4}\)

Q29. The central part of an atom where protons and neutrons are located is called the:

nucleus

orbit

electron cloud

shell

Q30. Each orbit can hold a maximum number of electrons given by:

the atomic number

\(2n^2\), where n is the orbit number

the octet rule

varies depending on the element

MCQ

Chemistry (DDCET)