Acid rain is harmful to the environment.

The diagram below shows a pulley arrangement:

1. Copy the diagram and mark the direction of tension on each strand of the string.
2. What is the velocity ratio of the arrangement?
3. If the tension acting on the
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Methane is an air pollutant that causes Green House effect.’ Name three sources of this gas

Choose the method of preparation of the following salts, from the methods given in the list:

[List: A. Neutralization B. Precipitation C. Direct combination D. Substitution]

1. Lead chloride
2. Iron (II)
...

The Council of Ministers headed by the Prime Minister, is the most Powerful Institution in the Indian Polity. In this context, answer the following: State briefly the position of the Prime Minister in the...

Write the equation for the reaction that occurs at the cathode during the extraction of aluminum by electrolysis.

Mention the exact location of the following:

1. Prostate gland
2. Myelin sheath
3. Islets of Langerhans
4. Semi-circular canals
5. Eustachian tube

The Council of Ministers headed by the Prime Minister, is the most Powerful Institution in the Indian Polity. In this context, answer the following: Write any four functions of the Cabinet.

The Union Executive which consists of the President, Prime Minister and the Council of Ministers is a powerful body in a Parliamentary Democracy. In this context, Mention the three categories of...

Aluminum carbide reacts with water according to the following equation:

Al₄C₃ + 12H₂O → 4Al (OH)₃ + 3CH₄

1. What mass of aluminum hydroxide is formed from 12 g of aluminum carbide?
2. What volume
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State the significance of the Policy of Appeasement as a cause for the Second World War

Briefly answer: Why is petroleum often referred to as "liquid gold"

When placed in bright sunlight for four hours, what do you observe with regard to the initial and final weight of the plant?
Give a suitable reason for your answer.

If the straight lines 3𝑥 - 5𝑦 = 7 and 4𝑥 + 𝑎𝑦 + 9 = 0 are perpendicular to one another, find the value of a.

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

Mention one disadvantage of rail transport.