Write the balanced chemical equation for the laboratory preparation of hydrogen chloride gas.

Name the tree: The stilt roots are underwater during high tide.

Ethane burns in oxygen to form CO2 and H2O according to the equation:

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O.

If 1250 cc of oxygen is burnt with 300 cc of ethane.

Calculate:

1. the volume of CO₂ formed.
2. the
...

The property by virtue of which the compound has the same molecular formula but different structural formulae.

What do you understand by the term ‘Scattering of light’? Which colour of white light is scattered the least and why?

Read the extract given below and answer the questions that follow:

On the other hand, possibly because he divined in Buck a dangerous rival, Spitz never lost an opportunity of showing his teeth. He...

The diagram below shows a magnetic needle kept just below the conductor AB which is kept in North South direction.

1. In which direction will the needle deflect when the key is closed?
2. Why is the
...

With reference to the Partition Plan, answer the following:

1. (i) Name the last Viceroy of India. (ii) State any two reasons for him to come to India.
2. Mention any three proposals under his plan.
3. State any
...

Give one word or a phrase: The tendency of an atom to attract electrons to itself when combined in a compound.

The inert electrode used in the electrolysis of acidified water is:

1. Nickel
2. Platinum
3. Copper
4. Silver

The diagram below shows a dual control switch circuit connected to a bulb.

1. Copy the diagram and complete it so that the bulb is switched ON.
2. Out of A & B which one is the live wire, and which one is the
...

How does the angle of deviation formed by a prism change with the increase in the angle of incidence?

Draw a graph showing the variation in the angle of deviation with the angle of incidence at a prism...

Name an area in India where Tropical Monsoon forest is found.

When does the nucleus of an atom tend to be radioactive

Name the highest criminal court in a district.

Give one word or a phrase: The chemical bond formed by a shared pair of electrons, each bonding atom contributing one electron to the pair.