9. Identify the state of matter based on the arrangement of the molecules

a) A - Gas, B - Solid, C – Liquid

b) A - Liquid, B - Solid, C - Gas

c) A - Gas, B - Solid, C – Liquid

d) A - Liquid, B - Gas, C - Solid

1. What is ductility?

Metals can be drawn into thin wires. This property of metals is called ductility. Example : copper wires.

On being hit, metals produce a typical sound. Hence, they are said to be sonorous. This property is being made used in making temple bells

The easiest way to represent the element and to write the chemical formulas easily.

4. Which non-metal is essential for our life and all living beings?

Metals can be drawn into thin wires. This property of metals is called ductility. Example : copper wires.

Water, Acetic acid, Hydrochloric acid

1. Metalloids are all solid at room temperature.2. They can form alloys with other metals 3. Some metalloids, such as silicon and germanium, can act as electrical conductors under the specific conditions, thus they are called semiconductors.

5. Why are bells made of metals?

On being hit, metals produce a typical sound. Hence, they are said to be sonorous. This property is being made used in making temple bells

The easiest way to represent the element and to write the chemical formulas easily.

1. Metalloids are all solid at room temperature.2. They can form alloys with other metals 3. Some metalloids, such as silicon and germanium, can act as electrical conductors under the specific conditions, thus they are called semiconductors.

6. What does a chemical symbol represent?

The easiest way to represent the element and to write the chemical formulas easily.

On being hit, metals produce a typical sound. Hence, they are said to be sonorous. This property is being made used in making temple bells

Water, Acetic acid, Hydrochloric acid

7. Give two examples for metalloids.

The easiest way to represent the element and to write the chemical formulas easily.

Water, Acetic acid, Hydrochloric acid

1. Metalloids are all solid at room temperature.2. They can form alloys with other metals 3. Some metalloids, such as silicon and germanium, can act as electrical conductors under the specific conditions, thus they are called semiconductors.

8. Mention any three compounds that exist in liquid state.

Water, Acetic acid, Hydrochloric acid

The easiest way to represent the element and to write the chemical formulas easily.

1. Metalloids are all solid at room temperature.2. They can form alloys with other metals 3. Some metalloids, such as silicon and germanium, can act as electrical conductors under the specific conditions, thus they are called semiconductors.

9. Write three properties of metalloids.

1. Metalloids are all solid at room temperature.2. They can form alloys with other metals 3. Some metalloids, such as silicon and germanium, can act as electrical conductors under the specific conditions, thus they are called semiconductors.

The easiest way to represent the element and to write the chemical formulas easily.

Water, Acetic acid, Hydrochloric acid

1. Can you store pickle in an aluminium utensil? Give reason.

Pickle cannot be stored in aluminium utensil. Because,pickle contains acids which can react with aluminium(metal) liberating hydrogen gas. This can lead to thespoiling of pickle.

The utensils are made up of aluminium and brass

The utensils are made up of aluminium and brassbecause, they are good conductors of heat. These metalutensils are generally tinned from inside to prevent anyreaction between such metal and foodstuff. For efficientcooking, those metals are used.

Because aluminium being a soft malleable metal it can be beaten into sheets and form thin wrapping sheets.Moreover it does not react with food items.

. 3. Why are utensils made up of aluminium and brass?

The utensils are made up of aluminium and brass The utensils are made up of aluminium and brassbecause, they are good conductors of heat. These metalutensils are generally tinned from inside to prevent anyreaction between such metal and foodstuff. For efficientcooking, those metals are used.

Pickle cannot be stored in aluminium utensil. Because,pickle contains acids which can react with aluminium(metal) liberating hydrogen gas. This can lead to thespoiling of pickle.

The alchemists try to change less valuable metal into gold. The process was called Alchemy.

Because aluminium being a soft malleable metal it can be beaten into sheets and form thin wrapping sheets.Moreover it does not react with food items.

The alchemists try to change less valuable metal into gold. The process was called Alchemy.

Pickle cannot be stored in aluminium utensil. Because,pickle contains acids which can react with aluminium(metal) liberating hydrogen gas. This can lead to thespoiling of pickle.

The utensils are made up of aluminium and brassThe utensils are made up of aluminium and brassbecause, they are good conductors of heat. These metalutensils are generally tinned from inside to prevent anyreaction between such metal and foodstuff. For efficientcooking, those metals are used.

Because aluminium being a soft malleable metal it can be beaten into sheets and form thin wrapping sheets.Moreover it does not react with food items.

8TH MATTER AROUND US

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OPEN ENDED QUESTION

30 sec • Ungraded

NAME

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1. The liquid metal used in thermometers is

a) copper

b) mercury

c) silver

d) gold

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2. The pictorial symbol for water given by the alchemists was

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

3. Which one of the following element name is not derived from planet?

a) Plutonium

b) Neptunium

c) Uranium

d) Mercury

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

4. Symbol of mercury is

a) Ag

b) Hg

c) Au

d) Pb

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

5. A form of non-metal which has high ductility is

a) nitrogen

b) oxygen

c) chlorine

d) carbon

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

6. The property which allows the metals to be hammered into their sheets is ___________

a) ductility

b) malleability

c) conductivity

d) shining strength

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8TH MATTER AROUND US

NAME

1. The liquid metal used in thermometers is

2. The pictorial symbol for water given by the alchemists was

3. Which one of the following element name is not derived from planet?

4. Symbol of mercury is

5. A form of non-metal which has high ductility is

6. The property which allows the metals to be hammered into their sheets is ___________

7. The non-metal which conducts electric current is

8. Pencil lead contains

9. Identify the state of matter based on the arrangement of the molecules

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