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6.Substances in Daily Use 6th Standard Science | सहावी विज्ञान

 

6.Substances in Daily Use 6th Standard Science



Q1.Substances available in nature are called ...........





Q2.Leather and wool are obtained from animal. They are ............... substances.





Q3.Jute and cotton are substances of ................





Q4.Substances obtained from living things are called.............





Q5.Substances that are not obtained from living things. They are called ............





Q6.New substances produced by processing naturally available substances are called ...........




Q7.The original constituent substances cannot be obtained again from new substances. such changes are called ................





Q8.Natural rubber is obtained from the sap of tree. This sap is called ...............





Q9.Rubber is heated with sulphur for three to four hours. This process is called..........





Q10.In rubber bands, the proportion of sulpher is ...............





Q11.Who is discover the process of vulcanization?





Q12.What is the botanical name of rubber tree?




Q13.In India, the maximum production of rubber is in ............... state.





Q14.Paper is a kind of Network of ............ fibres.





Q15.In India, The first factory to manufacture newspaper was established at Nepanagar in madhya pradesh in ...............





Q16.Rayon also known as ...............





Q17.What is mean by Hydrocarbons?





Q18.True or False. - Synthetic fabric catches fire easily.





Q19. ..........thread was developed simultaneously in New York and London."





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