Home
Class 11
CHEMISTRY
Assertion (A) : Ionosphere contains gase...

Assertion (A) : Ionosphere contains gases in the ionized from which form the basis for wireless communication.
Reason (R) : These ions reflect back the ratio waves to the earth.

A

Both A and R are true and R is the correct explanation of A.

B

Both A and R are true but R is not correct explanation of A.

C

A is true and R is false

D

A is false and R is true.

Text Solution

Verified by Experts

The correct Answer is:
1
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL CHEMISTRY

    NARAYNA|Exercise LEVEL-IV|27 Videos

  • ENVIRONMENTAL CHEMISTRY

    NARAYNA|Exercise LEVEL-I (H.W)|45 Videos

  • ENVIRONMENTAL CHEMISTRY

    NARAYNA|Exercise LEVEL -II (C.W)|21 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY

    NARAYNA|Exercise EXERCISE - 4|17 Videos

  • F-BLOCK ELEMENTS

    NARAYNA|Exercise LEVEL-II (C.W)|1 Videos

Similar Questions

Explore conceptually related problems

Which layer of the earth's atmosphere reflect back the radio waves to the earth's surface?

Radio waves are reflected back to earth from the

Assertion: In ionospheric reflection, phase change does not occurs with the light wave. Reason: The ionosphere reflection is similar to the tatol internal reflection is similar to the total internal reflection in miral.

Assertion: CO_(2) present in the atmosphere absorbs heat radiated from heat radiated from earth in the form of IR radiations. Reason: CO_(2) is a pollutant.

Assertion (A): Scattering of light is the reflection of light from an object in all directions. Reason (R): The colour of scattered light depends on the size of scattering particles and wavelength of light.

Assertion: Space waves are used for litre -of -sight communication. Reason: Space wave travels in a straight line from transmitting antenna to the receiving antenna.

NARAYNA-ENVIRONMENTAL CHEMISTRY-LEVEL -III
  1. Assertion (A) : Ionosphere contains gases in the ionized from which fo...

    Text Solution

    |

  2. Assertion (A) : Smaller particles (sie lt 5 microns) cause fibrosis of...

    Text Solution

    |

  3. Assertion (A) : The medium which is afffected by the pollutant is rece...

    Text Solution

    |

  4. Assertion (A) : The lower the concentration of DO, the the more pollut...

    Text Solution

    |

  5. Assertion (A) : Atmosphere plays an important role in maintaining the ...

    Text Solution

    |

  6. Assertion (A) : Excess amount of CO, in air is responsible for green h...

    Text Solution

    |

  7. Assertion (A) : Alkylated mercury is more toxic than mercury. Reason...

    Text Solution

    |

  8. Assertion: CO(2) and water vapour present in the atmosphere absorb the...

    Text Solution

    |

  9. Assertion (A) : Contries like Netherlands, Bangladesh and Maldives fac...

    Text Solution

    |

  10. Assertion (A) : Acid rain reduces the fertility of the soil. Reason ...

    Text Solution

    |

  11. Assertion (A) : Rain water normally has a P^(H) of le 5.6. Reason (R...

    Text Solution

    |

  12. Assertion (A) : The oxides of nitrogen and sulphur conbine with rain w...

    Text Solution

    |

  13. Assertion (A) : Acid rains have been reported in some places which are...

    Text Solution

    |

  14. Assertion (A) : Aldehydes are one of the consituents of photochemical ...

    Text Solution

    |

  15. Assertion (A) : Fluorosis results if F^(-) ion concentration exceeds 1...

    Text Solution

    |

  16. The correct match is

    Text Solution

    |

  17. The correct match is

    Text Solution

    |

  18. The correct match is

    Text Solution

    |

  19. The correct match is

    Text Solution

    |

  20. The correct match is

    Text Solution

    |