Question

(1) Give the name of a metallic element which is
lighter than water.
(2) What is iron compound formed when iron reacts
with water called ?
(3) Which non-metal is lustrous ?
4
(4) Which non-metal is a good conductor of
electricity ?
(5) What is the smallest unit of an element called ?
(6) What is produced when sulphur reacts with
oxygen ?
(7) What is the property of metals by which they
can be drawn into wires called ?
(8) Which non-metallic element is stored in water?
(9) From which metal can thin wire be drawn?
(10) Which metal foil is used for decorating sweets ?
(11) Which among aluminium, iron and copper
is the most reactive metal ?
(12) Where is the iron element found in our body?​

Answer 1

Answer:

1. Lithium
2. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust.
3. Iodine is a non-metal but is lustrous.
4. Graphite
5. An atom is the smallest particle of an element
6. Sulfur reacts with oxygen to form sulfur dioxide
7. Ability of metals to be drawn into wires is known as ductility.
8. phosphorus is a very reactive non-metal. It catches fire if exposed to air. To prevent the contact of phosphorus with atmospheric oxygen, it is stored in water.
9. Aluminium
10. Vark, also called varak (also silver leaf), is super fine filigree foil sheet of pure metals, typically silver but sometimes gold, used to decorate South Asian sweets and food
11. Aluminium is the most reactive metal.
12. body's iron is found in the red blood cells of our blood called hemoglobin and in muscle cells called myoglobin.