Lead nitrate solution is mixed with dilute hydrochloric acid and heated.

The diagram given below represents a section of the human heart. Answer the questions that follow:

1. Which parts of heart are in the diastolic phase? Give a reason to support your answer.
2. Label the parts
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Perilymph or endolymph (Which one surrounds the organ of Corti?)

Complete stoppage of menstrual cycle in females.

Give the Biological / technical term

Xylem transports starch from the leaves to all parts of the plant body.

Correct the following statements by changing the underlined words:

1. Name the waves used for echo depth sounding.
2. Give one reason for their use for the above purpose.
3. Why are the waves mentioned by you not audible to us?

The diagram given below represents a stage during cell division. Study the same and answer the questions that follow:

1. Identify whether it is a plant cell or an animal cell.
   Give a reason in support
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Action of dilute Hydrochloric acid on iron (II) sulphide.

What happens to the level of water when this setup is placed in

1. Humid conditions?
2. Windy conditions?

Pulmonary semilunar valve

Mention the exact location of the following:

A half metre rod is pivoted at the centre with two weights of 20 gf and 12 gf suspended at a perpendicular distance of 6 cm and 10 cm from the pivot respectively as shown below.

1. Which of the two
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Epididymis

Mention the exact location.

The organic compound which undergoes substitution reaction is

1. C₂H₂
2. C₂H₄
3. C₁₀H₁₈
4. C₂H₆

All life on Earth is supported by Photosynthesis.

Calculate the total resistance across AB: