The most common ore of iron is _____ . (calamine / haematite)

Nitrogen bonds are present between the complementary nitrogenous bases of DNA.

Correct the following statements by changing the underlined words:

How has composting proven to be a great help in managing waste?

Name two states of India where this type of soil is found.

Action of hot and concentrated Nitric acid on copper.

Write balanced chemical equation.

Use Graph paper for this question.

A survey regarding height (in cm) of 60 boys belonging to Class 10 of a school was conducted. The following data was recorded:

Taking 2 cm = height of 10 cm along...

The diagram of an apparatus given below demonstrates a particular process in plants. Study the same and answer the questions that follow:

1. Name the apparatus.
2. Which phenomenon is demonstrated by this
...

Study the picture given below and answer the questions that follow:

1. Mention the climatic condition that is suitable for the cultivation of this crop.
2. Name the state that produces the largest amount
...

Write the equation for the formation of aluminum at the cathode during the electrolysis of alumina.

Hydathodes

Mention the exact location of the following:

Advisory and Revisory Jurisdiction of the Supreme Court.

Answer the following questions with reference to Ray Douglas Bradbury’s short story, ‘All Summer in a Day’

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

Mrs Boyle: I am Mrs Boyle. (She puts down the suitcase)

Giles: I’m Giles Ralston. Come in to the fire. Mrs Boyle, and get warm. (Mrs...

The power of a lens is -5D.

1. Find its focal length.
2. Name the type of lens.

The immunity acquired by providing readymade antibodies from outside for treating certain infectious diseases.

Which property of sulphuric acid is shown by the reaction of concentrated sulphuric acid with:

1. Ethanol?
2. Carbon?