Question

write true or false.
1.all microorganisms are unicelluar.
2.alagae are the only microorganisms that contain chlorophyll.
3.drugs like streptomycin,tetracycline and aureomycin are produced from certain special kind of virus.
4.potato blight is caused by algae.
5.most fungi reproduce through spore formation.
6.nylon is used in the preparation of artificial silk.
7.another name of terylene is rayon.
8.rayon is prepared from cellulose.
9.nylon microfibers are much finer than human hair.
10.terylene burns readily producing no smoke.
11.most synthetic fibers are water absorent.
12.plastics are bad conductors of heat and electricity.
fill in the blanks
1.jute and cotton are ____polymers.
2.most synthetic fibres____ catch fire.
choose the correct option.
1.which of the following is a natural polymer?
a.rayon b.polythene c.cotton d.none of these
2.which of the following is a man made polymer?
a.silk b.nylon.c.wool.d.jute
3.pvc stands for_____
a.polyvinyl chloride b.primary vinyl chloride c.polyester d.none of these
4.which of the following can be melted?
a.bakelite b.polyethylene c.synmica d.none of these
5.which type of fibre is used for making textile for suitings and shirtings?
a.terylene b.rayon c.nylon d.all of these
6.which type of fibre is used for making socks and stockings?
a.nylon b.acrylic c.terylene d.polyster
7.which type of fibre burns vigorously without forming beads?
a.polyesterb.cotton c.silk d.wool
8.which type of the following is used to replace glass in some situations?
a.nylon b.acrylic c.terylene d.polyester
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Answer 1

Answer:

1. true

2. false

Explanation:

Answer 2

Answer:

only true and false afterwards fill in the blanks please make me brainlist thank you

Explanation:

1)false

2)false

3)true

4)false

5)true

6)true

7)true

8)false

9) false

10)true

11)false

12)true