Following signs are usually shown on the bottles of commercial acetic acid. The symbols indicate respectively that acetic acid is:

(a) In a tabular form, differentiate between ethanol and ethanoic acid under the following heads:

(i) Physical state (ii) Taste (iii) NaHCO3 test (iv)Ester test

(b) Write a chemical reaction to show the dehydration of ethanol.

(a) What is fragmentation in organism? Name a multicellular organism which reproduces by this method.

(b) What is regeneration in organisms? Describe regeneration in Planaria with the help of a suitable diagram.

To find the focal length of a concave mirror Rahul focuses a distant object with this mirror. The chosen object should be

For finding the focal length of a convex lens by obtaining the image of a distant object, one should use as the object