Array Chapter 4 Chemistry 9th Class MCQ Test Preparation Sindh

Total Questions: 15

Total Marks: 15

Time: 15 Mins

Question # 1

Which of the following combination is best explained by the coordinate covalent bond?

Question # 4

Sodium chloride has a high melting point. Sodium chloride does not conduct electricity when solid but does conduct electricity when molten. These properties show that the structure of sodium chloride is _____.

Question # 5

How can metals conduct electricity?

The sea of electrons are free to move around so can carry the electrical charge
The solid and regular arrangement of the metal ions means the electrical current can pass straight through the metal ions
The positive metal ions are free to move around so can carry the electrical charge
None of these
The metal ions are closely packed together so they can transfer the electrical current to each other

Question # 6

When partial positive end of one molecule is attracted weakly to partial negative end then force between them is _____.

Question # 7

Sharing of one electron pair by one species forms _____.

Question # 8

Which of the following is true about hydrogen bonding?

In liquid water, each water molecule is hydrogen bonded to two other water molecules.
Hydrogen bonding is one type of dipole-dipole interaction.
Hydrogen bonds are stronger than covalent bonds.
A hydrogen bond is a type of electrostatic attraction

Question # 9

Use the electron dot diagram to answer the question. If two atoms of Z could covalently bond together, what type of bond would result?

Question # 11

What causes dipole-dipole interactions?

The completion of octet
None of these
Sharing of electron pairs
The random motion of electrons
Bonding of a covalently-bonded hydrogen to a lone pair of electrons

Question # 12

Which of the following statements about coordinate covalent compounds is incorrect?

They are slightly soluble in water.
They are readily soluble in organic solvents.
They are bad conductors of electricity.
They posses dative bonding between two unlike atoms.
They are non-polar compounds.

Question # 13

Strength of intermolecular forces from ionic or covalent bond is _____.

cannot be predicted
equal
stronger
weaker

Question # 14

What are the properties of ionic compounds?

Low melting point, low boiling point, can conduct electricity and is malleable
High melting points, high boiling points, can conduct electricity when molten and in aqueous solution but not as a solid
Low melting point, low boiling point, poor conductors of electricity
High melting point, high boiling point, can conduct electricity and is malleable
None of these

Question # 15

Why are metals good conductors?

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