Related InterviewSolutions

• Classify the following substances according to their uses :sand, soap, wool, window glass, bamboo, cotton, bricks, silk, leafy vegetables, cement, fruits, water, sugar.
• State whether the following statements are 'true' or 'false'.(1) We can find plastic in nature.(2) Soap is a man-made substance.(3) We should reuse available resources.(4) Nylon clothes are good summer wear.(5) Glass is a man-made substance.(6) In irreversible changes original substances can be obtained again.(7) Rayon is made up of cotton and wood pulp.
• How are pearls obtained?
• Match the columns :Column 'A'Column 'B'1. Jutea. Animal origin2. Airb. Plant origin3. Leatherc. Man-made4. Cementd. Abiotic
• 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.