What are spermicides?

What are pesticides ? What are different types of pesticides ? Name one of each type.

Fill in the blank Sponge (Today) is a foam suppository or tablet containing ...... as spermicides.

Diaphragms are contraceptive devices used by the females. Choose the correct option from the statements given below (i) They are introduced into the uterus (ii) They are placed to cover the cervical region (iii) They acts as physical barriers for sperm entry (iv) They act as spermicidal agents.

What are fuel cells? What are its advantages?

What is a thermodynamic system ? What are it’s types ?

What are polymers? What are the different methods of their preparation?

What is a heat engine ? What are requisites for operating a heat engine ? What should be the characteristics of each part ?

What are emulsions? What are their different types? Give one example of each type.