AEC3302-Q2 (17/12/2024)

Define the Lewis  concept of acids and bases

• acids produce H⁺ ion and bases produce OH^- ion

• acids are proton donors and bases are proton acceptors

• acids are electron pair acceptors and bases are electron pair donor

• acids are electron pair donor and bases are electron pair acceptors

Select the correct formula of hydronium ion and the hydroxide ion

• H₃O⁺, OH⁺

• OH^-, H₃O^-

• OH^-, H⁺

• H₃O⁺, OH^-

Arrange the acids HOCl, HClO₃, and HClO₂ in order of increasing acid strength

• HOCl < HClO₂ < HClO₃

• HOCl < HClO₃ < HClO₂

• HClO₂ < HOCl < HClO₃

• HClO₃ < HOCl < HClO

Refer to the following balanced redox equation, identify which species is reducing agent.

• MnO₂

• Mn

• Cl^-

• Cl₂

Determine the oxidizing agent in the following redox equation .

• NO₃^-

• H₂S

• NO₂

• H₂O

Identify the oxidation number (O.N.) of N in the KNO₃.

• +6

• +5

• +3

• +1

Hard acids tend to bind to hard bases and produce

• Acidic

• Basic

• high ionic character

• high covalent character

The electron configuration of a Cr³⁺ ion is

• [Ar]3d⁵

• [Ar]3d³

• [Ar]4s¹3d⁵

• [Ar]4s¹3d²

The total number of electrons in the 3d orbitals of a copper atom is

• 7

• 8

• 9

• 10

Which of the following pairs of elements belong to the same period?

• Na and Cl

• Na and Li

• Na and Cu

• Na and Ne