Light – Reflection and Refraction — Science STD 10 — Question

Why carnivores have shorter small intestine?

Give two uses of a convex mirror. Explain why you would choose convex mirror for these uses.

Name the main organs of the human digestive system. Also name the associated glands.

Describe the process of fertilisation in a flower with the help of labelled diagrams.

What are the important differences between looking at a photograph of your face and looking at yourself in a plane mirror?

Distinguish between tropic movements and nastic movements in plants. Give examples to illustrate your answer.

Explain the given reaction with the example:Hydrogenation reaction.

How could you show that the colours of the spectrum combine to give white light?

How much heat will an instrument of 12W produce in one minute if it is connected to a battery of 12V?

Blue litmus solution is added to two test tubes A and B containing dilute HCl and NaOH solution respectively. In which test tube a colour change will be observed? State the colour change and give its reason.