The chemical formula for a covalently bonded group of atoms is called the molecular formula and it indicates the exact makeup of one molecule of a substance.

Which of the following is TRUE about ionic compounds?

1. They have low melting and boiling points.
2. They can conduct electricity in the solid state.
3. They are stronger than covalent bonds.
4. They are usually formed from 2 metals.

Compound formed through the transfer of the electron is ______ bond.

1. Ionic
2. Covalent
3. Molecular
4. Metallic

A material that forms a crystal lattice is:

1. Ionic
2. Covalent
3. Molecular
4. Metallic

Why do ionic compounds NOT conduct electricity when they are in solid state?

1. Their ions are free to move.
2. Their ions are held in fixed positions.
3. Their electrons are free to move
4. Their electrons are held in a fixed state

Ionic compounds conduct electricity when they are in their solid state.

1. True
2. False

Ionic compounds have low boiling points.

1. True
2. False

Ionic compounds conduct electricity when dissolved in water. Which statement below explains the best?

1. Ions are free to move.
2. Electrons are free to move.
3. Bonds are strong.
4. There are weak intermolecular forces of attraction.

What properties does an ionic compound have?

1. A low boiling point and it conducts electricity when dissolved in water
2. A high melting and it conducts electricity when liquid
3. A high boiling point and it conducts electricity when solid
4. None of the above

What type of forces hold on an ionic lattice compounds?

1. Electrostatic attraction forces
2. Covalent bond
3. Metallic bond
4. Van der Waals forces

A car moving at a velocity of 5 m/s accelerates to 25 m/s while covering a distance of 1.8 km. The time it takes to cover that distance is ___ seconds.

A ball is dropped from the top of a building of height 80 m. Considering the acceleration due to gravity of the Earth to be 10 m/s², the time it takes to hit the ground is ____s

The displacement of the body whose v-t graph is given below is ____ m.

The x-intercept and the y-intercept of a v-t graph represent ___ and ___ respectively.

1. Time lag, final velocity
2. Acceleration, initial velocity
3. Initial velocity, time lag
4. Time lag, initial velocity

In a running race between 4 people, the 1^st person did not start running as soon as the whistle was blown. He started running after a few seconds. The x-intercept of the v-t graph of the 1^st person is ___.

1. > 0
2. < 0
3. = 0
4. Any of the above

A stone is thrown upwards. It moves upwards for some time and then starts falling down. The velocity that the stone has just before touching the ground is ___.

1. Minimum
2. Maximum
3. Zero
4. Can be anything