Question

(5)
Que - 1
Write the name of the synthetic fiber having the following properties.
1. It is strong, clastic and light. It is lustrous and easy to wash. So it becomes very
popular for making clothes,
2. Made from wood pulp and woven sheet with cotton and woven mat with wool.
3. The fabno made from this fiber docs not crumble easily, it stay tight and easy to
wash so it's useful in making wearable fabrics.
4. Useful in making sweaters cheaper than wool.
5. Thin fibers can be made of it and can be woven like any other thread.
LO
Que -2
Applies learned scientific Concepts in daily life.
Answer the following question.
1. 50 kg wheat has been brought to your house. What will you do to take care of it?
2. Explain where and why metallic material (any one) and non- metallic material (any
one) have been used in your home,
LO
Que - 3
3. Which agriculture tool would you choose to sow seeds in the field?
Illustrates the process and the phenomenon.
Answer the following questions.
1. Explain the process of harvesting,
2. When you add water to sulfur dioxide and put a blue litmus paper in it, why does it
tum red?
3. When we put burning candle near the mouth of test tube consisting of sulfuric acid &
magnesium metal, why does it explode
le change when we take a solution of
(1)​

Answer 1

Answer:

test tube consisting of sulfuric acid &

magnesium metal, why does it explode

le change when we take a solution of

(1)

Answer 2

Answers to the given Questions.

Explanation:

Que- 1

1. Nylon is strong, elastic, and light. It is lustrous and easy to wash. So it becomes very  popular for making clothes.

2.  Rayon Made from wood pulp and woven sheet with cotton and woven mat with wool.

3. The fabric made from nylon fiber does not crumble easily, it stays tight and easy to  wash so it's useful in making wearable fabrics.

4. Acrylic is useful in making sweaters cheaper than wool.

5. Thin fibers of Terylene can be made and can be woven like any other thread.

Que- 2

1. The 50 kg wheat needs to be washed thoroughly to rid it of any dust or other impurities, then it needs to be air-dried to rid them of any moisture. Lastly, they need to store in air-tight containers.

2. Copper is a metallic material used in my home for electrical wiring and doors are the non-metallic materials used in the home.

3. A hoe is a hand-held tool that can be used to sow seeds in the field.

Que-3

1. Harvesting is the process of collecting the ripened fruit from the fields.

2. When we add water to sulphur dioxide, it gets converted into sulphuric acid, which turns blue litmus paper into red.

3. When we put burning candle near the mouth of test tube consisting of sulfuric acid &  magnesium metal, it explodes due to the presence of hydrogen gas. Magnesium and sulfuric acid react to give magnesium sulfate and hydrogen gas.