1.

Fill in the blanks using proper works :(1) Natural rubber is obtained from …………… of trees.(2) Changes where the original constituent substances cannot be obtained again from the new substances are called …………… changes.(3) A paper factory in Maharashtra is situated at …………… .(4) Glass can be made from …………… and …………… .(5) Botanical name of rubber plant is …………… .(6) …………… obtained from mineral oils are used to make polymer chains.(7) The maximum production of rubber in India is in …………… .(8) …………… invented the process of vulcanisation.

Answer»

(1) latex

(2) irreversible

(3) Ballarpur

(4) sand, calcium

(5) Hevea brasiliensis

(6) Hydrocarbons

(7) Kerala

(8) Charles Goodyear



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