P-2 Cell Biology and Biotechnology — Science STD 10 — Question

The speed of light in water is…………in benzene.

When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what the following are examples of:
The smell of the food.

The focal length of a lens with power 2.5 D is………..

When a light ray travels obliquely from benzene to air, it bends…………the normal at the point of incidence.

Name the phenomenon due to which a swimming pool appears less deep than it really is.

In the reactor of a nuclear power plant, name the material which is used:
To absorb radiations.

Two exactly similar heating resistances are connected (i) in series, and (ii) in parallel, in two different circuits, one by one. If the same current is passed through both the combinations, is more heat obtained per minute when they are connected in series or when they are connected in parallel? Give reason for your answer.

What property do all elements in the same column of the periodic table as boron have in common?

State any one characteristic of gravitational force