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Assertion : Earth's outer mineral cover ...

Assertion : Earth's outer mineral cover refers to lithosphere.
Reason : Troposphere extends to about 10 km above earth's surface.

A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

B

If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

C

If Assertion is correct , but Reason is incorrect.

D

If both Assertion and Reason are incorrect .

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • A satellite is revolving in an elliptical orbit around the earth, earth being at any focus of the ellipse. At perihelion , Which is that point in the satellite's orbit at which it is closest to the earth, it is 1200 km above the surface of earth. At aphelion , a point in the satellite's orbit at which it is most distant from the earth, it is 6000 km above the earth's surface. Given "GM"_(E)=4 xx 10^(14)"N-m"^(2)//"kg" (G is the universal gravitational constant and M_(E) is the mass of earth.) Radius of earth= 6400 km Speed of the satellite at aphelion is nearly

    A
    `4951" m/s"`
    B
    `2951" m/s"`
    C
    `1951" m/s"`
    D
    `3951" m/s"`

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    A
    1.92
    B
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    C
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    D
    1.63

  • Read the assertion and reason carefully to mark correct option in question Assertion : Life appeared 500 million years after the formation of earth . Reason : There was no atmosphere on early earth .

    A
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    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion .
    C
    If assertion is true but reason is false .
    D
    If both assertion and reason are false .

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