Question

in an ionic bond
a each atom gains electrons.
b atoms share a pair or more of electrons.
c oppositely charged atoms attract.
d like - charged atoms repel.

question 14
electrolytes are substances that
a form covalent bonds with water.
b ionize in water.
c cannot conduct electricity in solution.
d form bonds that are stable in water.

Explanation:

First Question (Ionic Bond):

• Option A: In ionic bonds, one atom loses electrons (cation) and another gains (anion), not each atom gains. Eliminate A.
• Option B: Sharing electrons is covalent bonding, not ionic. Eliminate B.
• Option C: Ionic bonds form when oppositely charged ions (atoms that gained/lost electrons) attract. This matches ionic bond definition.
• Option D: While like - charged atoms repel is a general electrostatic principle, it's not the defining feature of an ionic bond (which is about attraction of opposites). So the key feature of ionic bond is attraction of oppositely charged atoms.

• Option A: Electrolytes ionize (form ionic bonds with water - related dissociation), not covalent bonds. Covalent bond formation with water is not characteristic of electrolytes. Eliminate A.
• Option B: Electrolytes are substances that ionize in water (dissociate into ions), allowing the solution to conduct electricity. This is the definition of electrolytes.
• Option C: Electrolytes conduct electricity in solution (due to ions), so "cannot conduct" is wrong. Eliminate C.
• Option D: The stability of bonds in water is not the defining feature of electrolytes. Electrolytes ionize, and their ions are mobile for conductivity. Eliminate D.

Answer:

C. oppositely charged atoms attract.

Question 14 (Electrolytes):