Question 1 :
Assertion: It is recommended to avoid plastics as far as possible.
Reason: It takes several years to decompose causing environmental pollution.
Question 2 :
The fibre used in parachute making and ropes for rope climbing is__________.
Question 3 : <p class="MsoNormal">Substances which cannot be decomposed by micro-organisms are called non-biodegradable substances.</p>
Question 4 :
State whether true or false :<br/><br/>Bakelite is the first synthetic thermosetting plastics.
Question 5 :
Statement: Plastics which get deformed easily on heating and can be bent easily are known as thermoplastics.<br/>State whether the given statement is true or false.
Question 15 :
State whether true or false :<br/>Ropes made by rayon are used in cranes and elevators.
Question 16 :
State whether true or false :<br/>Natural fibres are obtained from plants and animals.
Question 17 :
Which of the following are the advantages of plastic over metals?<br/>1. Plastics are lighter.<br/>2. Plastics are usually cheaper.<br/>3. Plastics are inert to both acids and alkalis.<br/>
Question 19 :
When plastics are burnt toxic substances are released into the air causing water pollution.
Question 21 :
$X$ is a thread of filament from which $Y$ is made. If prepared from plants and animals, it is known as $Z$ fibres whereas by humans it is known as $W$ fibres. Synthetic fibres are nylon, rayon, polyester, acrylic etc.<br/>What is $Y$?
Question 24 :
Teflon is a special plastic on which oil and water do not stick.
Question 33 :
Yarn can be converted into fabrics by the process of spinning.
Question 35 :
Which of the following is an example of soft and fine wool?
Question 37 :
Materials which are not obtained from plants and animals are called :
Question 42 :
Which of the following fibre can be drawn into very fine fibres that can be woven like any other yarn? <br>
Question 43 :
State, whether the following statements are True or False.<br>Nylon is a polyamide polymer.
Question 45 :
Assertion: Plastics are non-biodegradable.
Reason: As they cannot be decomposed by micro-organisms.
Question 46 :
The fibre developed in New York & London simultaneously is :
Question 48 :
A material which is not easily decomposed by natural processes is termed as :
Question 51 :
Which of the following represents the correct match for items in Column A with those in Column A.                   Column A.                       Column B.<br/>I. Nylon                        (i) Thermoplastic<br/>II. PVC                         (ii) Thermosetting plastic<br/>III. Bakelite                  (iii) Fibere
Question 52 :
Which of the followings prove that plastics do not make food and medicine toxic?
Question 54 :
Which of the following is/are reasons of using plastics?<br/>1.They are transparent.<br/>2. They are cheap.<br/>3. They can be moulded into diffrent shapes.<br/>
Question 56 :
A silk saree and a nylon saree, both of same length are put to dry under sun. Which one will dry faster?
Question 57 :
Assertion: Plastics are not hazardous when buried in land-fills.
Reason: Plastic waste is pre-dominantly eco-neutral or inert. It does not generate toxic leachates which contaminate the soil or ground water resource.
Question 58 :
Which of the following is not a characteristic of thermosetting polymers?
Question 60 :
State true or false.<br/>Like synthetic fibres, plastic is also a polymer.
Question 66 :
Assertion: Plastics are not toxic when come in contact with food and medicines
Reason: Plastics are used world-over because they are safe for packaging of foods, medicines and child care products
Question 68 :
Which of the following is used for making parachutes and stockings?
Question 70 :
The fibre developed in Newyork & London simultaneously is known as:
Question 72 :
Use of charkha was popularized by Mahatma Gandhi as part of the Independence movement. <br>
Question 76 :
The material which is commonly used for making kitchen containers is :<br/>
Question 78 :
We come to a conclusion, that plastics are bad conductors of electricity from the following.
Question 81 :
Which of the following will be suitable for coating dress materials of fire - men ?
Question 83 :
Read the following statement and mark the correct answer <br/>I. Artificially prepared synthetic fibre which resembles silk is known as terylene.<br/><br/>II. Rayon is not considered as a synthetic fibre as it is regenerated from cellulose.<br/>III. PET bottles and jars are made up of polyesters. 
Question 85 :
Suhana wants to present her friend gift made from plant fiber. Which of the following will she select?
Question 87 :
Fabric made from which of the fibre does not get wrinkled easily?<br>
Question 90 :
_____ waste products can also be called green waste, food waste, or organic waste.
Question 92 :
A person should not wear polyester clothes while cooking in the kitchen because:
Question 93 :
Which is the correct sequence in context with the least bio degradable to most biodegradable material?
Question 95 :
Assertion: Most of the synthetic polymers are not biodegradable.
Reason: Polymerization process induces toxic character in organic molecule.
Question 97 :
Plastic __________ the percolation of water into the soil and prevents replenishment of ground water.
Question 100 :
Which of the following can absorb over 90% of its own mass of water and also does not stick to wounds?
