Question

8. Which of the following is/are true when milk changes into curd?
1. Its changes colour from liquid to semisolid it. It changes colour
. It changes taste
iv. The changes cannot be reversed
a ) and (ii) are correct
b.) to (iv) are correct
c.(i) and (ii) correct
d. (i) and (iii) (iv) are correct

9. The gas we use in the kitchen is called Liquified Petroleum Gas (LPG). In the
cylinder it exist as a liquid. When it comes out from the cylinder it becomes a gas
(change-A) then it burns (change-B). The following statements pertain to these
changes. Choose the correct one.
a. Process - A is a chemical change.
b. Process - B is a chemical change.
c. Both processes A and B are physical changes.
d. None of these processes is a chemical change.

10. Anaerobic bacteria digest animal waste and product biogas (change-A). The
biogas is then burnt as fuel (Change-B). The following statements pertain tothese changes. Choose the correct one.
a. Process-A is a chemical change.
b. Process-B is a chemical change.
c. Both processes A and B are chemical changes.
d. None of these processes is a chemical change.​

Answer 1

Answer:

8. b the change cannot be reversed

9. d none of the process is a chemical chanfe

10. c both process A and B are chemical change