Assessment Quiz: Lesson 1: Speed, Uniform Acceleration and Laws of Motion

Question 1

A car starts moving from rest and accelerates uniformly at 3 m/s² for 5 seconds. What is its final velocity?

Accepted Answer

15 m/s

Answer

8 m/s

Answer

75 m/s

Answer

1.67 m/s

Question 2

An ionic bond is formed primarily between:

Accepted Answer

A metal atom that loses electrons forming a cation and a non-metal atom that gains electrons forming an anion due to electrostatic attraction

Answer

Two non-metal atoms sharing pairs of valence electrons equally

Answer

Positive metal ions immersed in a sea of delocalized electrons

Answer

Noble gas atoms at very low temperatures

Question 3

Which of the following compounds exhibits polar covalent bonding due to a significant difference in electronegativity between 0.4 and 1.7?

Accepted Answer

Water (H2O)

Answer

Sodium chloride (NaCl)

Answer

Chlorine gas (Cl2)

Answer

Methane (CH4)

Question 4

The nitrogen molecule (N2) contains a:

Accepted Answer

Triple covalent bond (one sigma bond and two pi bonds) sharing 3 electron pairs

Answer

Single ionic bond

Answer

Double covalent bond

Answer

Coordinate dative bond

Question 5

Solid ionic compounds such as crystal NaCl do NOT conduct electricity in the solid state because:

Accepted Answer

Their ions are tightly locked in fixed positions within the rigid crystal lattice and cannot move freely

Answer

They contain no electrical charges

Answer

Electrons are moving too rapidly

Answer

They decompose in the presence of air

Question 6

A metallic bond is physically described as the electrostatic attraction between:

Accepted Answer

Positive metal cations in the crystal lattice and the mobile sea of delocalized valence electrons

Answer

Protons and neutrons in the nucleus

Answer

Positive ions and negative non-metal anions

Answer

Dipole molecules in a polar liquid

Question 7

Acids are chemical compounds that dissociate in aqueous solutions to produce:

Accepted Answer

Hydrogen ions (H+ or hydronium ions H3O+), turning blue litmus paper red

Answer

Hydroxide ions (OH-) turning red litmus paper blue

Answer

Sodium ions and chlorine gas

Answer

Precipitated metallic salts

Question 8

The chemical formula of aluminum sulfate is correctly written as:

Accepted Answer

Al2(SO4)3

Answer

AlSO4

Answer

Al3(SO4)2

Answer

Al(SO4)3

Question 9

Which of the following oxides is classified as an amphoteric oxide that reacts with both acids and bases to yield salt and water?

Accepted Answer

Aluminum oxide (Al2O3)

Answer

Sodium oxide (Na2O)

Answer

Carbon dioxide (CO2)

Answer

Sulfur trioxide (SO3)

Question 10

The reaction between an acid and a base to produce a salt and water is known as a:

Accepted Answer

Neutralization reaction

Answer

Combustion reaction

Answer

Thermal decomposition reaction

Answer

Polymerization reaction

Reading the displacement–time graph

12 Reading the displacement–time graph

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