If (k –3), (2k + 1) and (4k + 3) are three consecutive terms of an A.P

If (k –3), (2k + 1) and (4k + 3) are three consecutive terms of an A.P,  find the value of k

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The ratio between the number of molecules in 2g of hydrogen

The ratio between the number of molecules in 2g of hydrogen and 32g of oxygen is:

  1. 1:2
  2. 1:0.01
  3. 1:1
  4. 0.01:1 [Given that H=1, O=16]
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Trees must be planted in the industrial areas

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

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With reference to black soil: Name one important crop which grows in this soil

With reference to black soil: Name one important crop which grows in this soil.

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Name a manufacturing centre for each of the following industries

Name a manufacturing centre for each of the following industries:

  1. Aircraft
  2. HMT
  3. Railway coaches
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The tendency of an atom to attract electrons to itself

Give one word or a phrase: The tendency of an atom to attract electrons to itself when combined in a compound.

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In the given figure, ABCDE is a pentagon inscribed in a circle such that AC is a diameter

In the given figure, ABCDE is a pentagon inscribed in a circle such that AC is a diameter and side BC//AE. If ∠BAC = 50°, find giving reasons:

  1. ∠ACB
  2. ∠EDC
  3. ∠BEC

Hence prove that BE is also a diameter

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There is frequent urination in winter than in summer

There is frequent urination in winter than in summer.

Give biological reasons

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Give the names of two leaders who led the Home Rule Movement

Give the names of two leaders who led the Home Rule Movement in India.

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The process by which certain ores, specially carbonates

The process by which certain ores, specially carbonates, are converted to oxides in the absence of air.

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The difference of two natural numbers is 7 and their product is 450

The difference of two natural numbers is 7 and their product is 450. Find the numbers.

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From the top of a cliff, the angle of depression of the top and bottom of a tower

From the top of a cliff, the angle of depression of the top and bottom of a tower are observed to be 45 and 60° respectively. If the height of the tower is 20 m. Find:

  1. the height of the cliff
  2. the
  3. ...
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Why tea bushes have to be pruned at regular intervals?

With reference to the cultivation of tea, Why tea bushes have to be pruned at regular intervals?

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