This question has statement-1 and statement -2. Of the four choices given after the statements, choose the one that best describes the two statements.
Statement - 1: Sky state of signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals.
Statement -2: The state of ionosphere varies from hour to hour, day to day and seasons to seasons.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is incorrect but Reason is correct

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Assertion is correct but Reason is incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Sky state of signal are used for long distance communication. The sky state signals are less stable than ground wave signals because of the variation of state of ionosphere.

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Q. Direction : The question has Statement 1 and Statement 2. Of the four choices given after the statements, choose the one that describes the two statements.
Statement 1 : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals.
Statement 2 : The state of ionosphere varies from hour to hour, day to day and season to season.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices.

(a) Assertion and Reason both are correct statements an Reason is correct explanation for Assertion.

(b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion.

(d) Assertion is wrong statement but Reason is correct statement.

Assertion (A) The packing efficiency is maximum for the fcc structure.

Reason (R) The coordination number is 12 in fcc structures.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices.

(a) Assertion and Reason both are correct statements an Reason is correct explanation for Assertion.

(b) Assertion and Reason both are correct satements but Reason is not correct explanation for Assertion.

(d) Assertion is wrong statement but Reason is correct statement.

Assertion (A) Semiconductors are solids with conductivities in the intermediate range from $10^{-} 6 - 10^{4} o h m^{-} 1 m^{-} 1$ .

Reason (R) Intermediate conductivity in semiconductor is due to partially filled valence band.

Assertion (A) Bond angle in ethers is slightly less than the tetrahedral angle.
Reason (R) There is a repulsion between the two bulky (- R) groups.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

In the following question a statement of assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question.
Assertion (A) Electron gain enthalpy becomes less negative as we go down a group.
Reason. (R) size fo the atom inscreses on going down the group and the added electron would be farther from the nucleus.
(a) Assertion and reason both are correct statement but reason is not correct explanation for assertion.
(b) assertion and reason both are correct statements and reason is correct explanation for assertion .
(c) Assertion and reason both are wrong statements.
(d) Assertion is wrong statement but reason is correct statement.

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The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for AssertionSky state of signal are used for long distance communication. The sky state signals are less stable than ground wave signals because of the variation of state of ionosphere.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Sky state of signal are used for long distance communication. The sky state signals are less stable than ground wave signals because of the variation of state of ionosphere.