Diversity In Living Organisms — Science STD 9 — Question

Define the term ‘latent heat of fusion’ of a solid. How much is the latent heat of fusion of ice?

Name three most important nutrients required for plant growth.

A train is travelling at a speed of 90km/h^–1. Brakes are applied so as to produce a uniform acceleration of – 0.5ms^-2. Find how far the train will go before it is brought to rest.

What would you observe when:
A saturated solution of potassium chloride prepared at 60°C is allowed to cool to room temperature.

What are the three groups into which all the elements can be divided? Name two elements belonging to each group.

A bus running at a speed of 18km/h is stopped in 2.5 seconds by applying brakes. Calculate the retardation produced.

How many atoms are there in 0.25 mole of hydrogen?

Classify each of the following as a homogeneous or heterogeneous mixture.
soda water, wood, air, soil, vinegar, filtered tea.