CHEMISTRY FORM 4 QUIZ 2 (MRSM BETONG-3)

Which compound is formed by transferring electron?

• oxygen

• carbon dioxide

• sodium oxide

• hydrogen peroxide

Element X reacts with sulphur to form a compound with formula X₂S.

What is the correct electron arrangement of X?

[Proton Number:S=16]

• 2.8.1

• 2.8.2

• 2.8.3

• 2.8.4

Which substance is a covalent compound?

• phosphorus(V) oxide

• sodium sulphate

• magnesium chloride

• lead(II) bromide

Which atom forms a cation?

• chlorine

• hydrogen

• nitrogen

• oxygen

Compound X conducts electricity in aqueous solution or molten state. It also has a high melting point and boiling point.

What is X?

• CCl₄

• MgCl₂

• CO₂

• NH₃

An atom of element E has 16 neutrons. The nucleon number of elemnt E is 31. Atom E receives electrons to form ion E.

How many electrons in ion E?

• 10

• 15

• 16

• 18

Magnesium chloride is an ionic compound.

Which substance can dissolve magnesium chloride?

• ether

• water

• hexane

• methylbenzene

Diagram shows a diamond molecule.

Which of the following is correct about the molecule?

• high melting and boiling points

• able to conduct electricity

• formed from the sharing of electrons of metal atoms

• Van der Waals force of attraction exists between its molecules

Diagram above shows part of the diagram for the formation of metallic bond.

What is X?

• anion

• electron

• neutron

• cation

Diagram above shows the state of curly hair when dry and wet.

Which of the following statement explains the situation?

• covalent bond in protein molecules of hair is broken with the presence of water molecules

• protein molecules in hair forms hydrogen bond with water molecules when hair is wet

• protein molecules in hair absorbs water when wet, causing the molecular size to increase

• electrons in the protein molecules are delocalised to form sea of electron causing wet hair to appear straight when wet