Write balanced chemical equations for each of the following:

1. When excess of ammonia is treated with chlorine.
2. An equation to illustrate the reducing nature of ammonia.

Give three reasons as to why airways are becoming a popular means of transport in modern India.

The relaxation phase of the heart.

Give appropriate biological or technical terms for the following:

The following numbers, K + 3, K + 2, 3K - 7 and 2K - 3 are in proportion. Find K.

State the conditions required for total internal reflection of light to take place

Certain blank spaces are left in the following table and these are labelled as A, B, C, D and E. Identify each of them.

The canal through which the testes descend into the scrotum just before the birth of a male baby.

Give the Biological / technical term.

Explain why it is preferable to use a number of graphite electrodes as anode instead of a single electrode, during the above electrolysis.

The diagram given below is that of a developing human foetus. Study the diagram and then answer the questions that follow:

1. Label the parts numbered 1 to 3 in the diagram.
2. Mention any two functions
...

Burning of ammonia in air.

The equation $ \ce{4NH3 +5O2 -> 4NO + 6H2O} $, represents the catalytic oxidation of ammonia. If 100 cm³ of ammonia is used calculate the volume of oxygen required to oxidise the ammonia completely.

Draw a neat labeled diagram of an A.C. generator.

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.

Why must segregation of waste be done before disposal?

Explain briefly the term ‘Court of Record’ with reference to the High Court.

With reference to the Rise of Dictatorships and the Second World War, answer the following: Explain any three consequences of World War II.