Question

Q.7)Answers the following(Any 5) :-
1)How would you identify hard and soft water ?
2)What are the various method by which water can be made fit for drinking?
3)The mass of a material contained in 10 cubic cm is 10000kg , calculate its density?
4)What is antacids , what is their function? 5)Write the difference between Mixture and Compound?
6)If a simple pendulum takes 32 seconds to complete 20 oscillations , find its time period?​

Answer 1

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