Glycine and Alanine are different with respect to one substituent on the `alpha` -carbon. What are the other common substituent groups?

One of the consituent of bakking powder is sodium hydrogen carbonate, the other constituent is

What are the different ways of grouping the objects ?

Draw different pairs of circles. How many points does each pair have in common ? What is the maximum number of common points ?

What are different units of force and how are these related to each other?

At what rate the images pass one after the other on a cinema screen?

Explain the fact that in aryl ethers (i) the alkoxy group activates the benzene ring towards electrophilic substitution and (ii) it directs the incoming substituents to ortho -and para -positions in benzene ring .

(a) Collect different kinds of packaging material. What was the purpose for which each one was used ?Discuss in groups.

What are the different criteria on basis of which materials can be grouped ?

What are different kinds of animal tissue? Give one example and one function of each type.