Give a geographical reason: Wind is a common agent of soil erosion in arid regions

A block and tackle system of pulleys has velocity ratio 4.

1. Draw a neat, labelled diagram of the system indicating clearly the points of application and direction of load and effort.
2. What will be its
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Give a geographical reason: Dry farming is preferred in areas with red soil

An alloy of lead and tin that is used in electrical circuits.

(i) Define scattering.

(ii) The smoke from a fire looks white. Which of the following statements is true?

1. Molecules of the smoke are bigger than the wavelength of light.
2. Molecules of the smoke are
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In a class of 40 students, marks obtained by the students in a class test (out of 10) are given below:

Calculate the following for the given distribution: i. Median ii. Mode

The metal which does not react with water or dilute H₂SO₄ but reacts with concentrated H₂SO₄ is ____ . (Al / Cu / Zn / Fe)

Give any three effects of the Quit India Movement launched by Gandhi in 1942 that was significant to the last phase of the National Movement of India.

State your observations when

Dilute Hydrochloric acid is added to Copper carbonate.

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

Give a reason: Trees must be planted in the industrial areas

Action of Sodium hydroxide solution on ferrous sulphate solution.

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
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1. How can a temperature in degree Celsius be converted into S.I. unit of temperature?
2. A liquid X has the maximum specific heat capacity and is used as a coolant in Car radiators. Name the liquid X.

Give a reason: Central Maharashtra gets less rainfall than the coastal area of Maharashtra.