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Write scientific reason.
Anodization method is useful for prevention of the corrosion of the aluminium.
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Write scientific reason.
On exposure to air, silver articles turn blackish after some time.
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Write scientific reason.
Coins are made from metals and alloys.
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Define acceleration due to gravity.
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Write acceleration due to gravity value on the surface of Earth.
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The mass of planet ‘X” is four times that of the earth and its radius is double the radius of the earth. The escape velocity of a body from the earth is 11.2 × 103 m/s. Find the escape velocity of a body from the planet 'X’.
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Distinguish between Direct current and alternating current.
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Write the characteristics of ethanol.
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Write the uses of ethanol.
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Distinguish between:
Universal gravitational constant - Gravitational acceleration of earth.
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Write a short note.
Escape Velocity
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Explain concept with example/explain with the help of a balanced equation.
Corrosion
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Draw a neat labelled diagram.
Electroplating
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Draw a neat labelled diagram.
Anodizing
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Complete flow chart given below.

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The mass and weight of an object on earth are 5 kg and 49 N respectively. What will be their values on the moon? Assume that the acceleration due to gravity on the moon is 1/6th of that on the earth.
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3, 1, 2 electrons are in valence shells of X, Y, Z elements. From this information, state the group in which they belong and write their valencies.
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What is rust?
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Write a molecular formula for rust.
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