Paper

Q.

Explain the process of making yarn from fiber.

Q.

What is retting?

Q. Liquid collected after filtration what is it called?

Q.

Which of the following is/are material(s)?

1. Plastic, wood and stone

2. Wood, heat and light.

3. Plastic, sound and light

4. Sound, Heat and Light

Q. How would you obtain clear water from a sample of muddy water?​

Q. Arrange the processes involved in the paper manufacturing in the correct sequence:

1. Pulp formation
2. Mixing additives
3. Drying
4. Winding on reels

Q. Which of the following can be used to manufacture paper?

1. Grass
2. Tree bark
3. Rubber
4. Waste paper

Q.

Question 07

Which among the following are commonly used for making a safety pin?

(a) Wood and glass

(b) Plastic and glass

(c) Leather and plastic

(d) Steel and plastic

Q. Paper consists of cellulose fibres.

1. True
2. False

Q. is responsible for the yellowing of paper.

1. Cellulose
2. Lignin
3. Pulp

Q.

Which of the following is not present in the filtered water?

1. Salts
2. Germs
3. Minerals
4. Dirt

Q. Which is the raw material required in paper production?

1. Bamboo
2. Eucalyptus
3. Subabul tree
4. All of the above

Q. The process of soaking pieces of wood in chemicals, during the manufacturing of paper is known as ________.

1. peeling
2. pulping
3. winding
4. vulcanising

Q. In water purification, after sedimentation water undergoes:

1. filtration
2. ozonisation
3. aeration
4. chlorination

Q. Arrange the steps involved in the manufacturing of paper.

1. Finishing $\to$ Mixing additives $\to$ Drying $\to$ Pulping
2. Mixing additives $\to$ Pulping $\to$ Drying $\to$ Finishing
3. Pulping $\to$ Mixing additives $\to$ Drying $\to$ Finishing
4. Drying $\to$ Finishing $\to$ Pulping $\to$ Mixing additives

Q. Why should we avoid using plastic bags?

Q.

How will you separate a mixture ofchalk powder and water

Q.

We need to look at alternative sources of paper because paper demand is one of the leading causes of deforestation.

1. False

2. True

Q. Which of the following object is not made from paper?

1. Bullock cart
2. Book
3. toys
4. calenders

Q. Describe the process by which clean water can be separated from muddy water

Q.

Pick the odd one out:

1. Apple

2. Wood

3. Cotton

4. Bottle