Home
Class 12
CHEMISTRY
Explain i Helium is used in inflating ae...

Explain i Helium is used in inflating aeroplane tyres? ii. Solubility of noble gases in water inereases as we move down the group.

Text Solution

Verified by Experts

i. It is non inflammable inspite of its low density. ii. Solubility of noble gases in water is due to diploe induced dipole attraction between water molecule. and ahe atom of noble gas. Figure Solubility increases from He to Rn down the group due to increase in polarisation. with increasing size.
Promotional Banner

Topper's Solved these Questions

  • THE d- AND f- BLOCK ELEMENTS

    V PUBLICATION|Exercise QUESTION BANK|190 Videos

  • THE SOLID STATE

    V PUBLICATION|Exercise QUESTION BANK|184 Videos

Similar Questions

Explore conceptually related problems

Are you familiar with the Bohr model of an atom? See the Bohr model of atoms of certain element, group I. What happens to the size of an atom when we move down the group?

Which are correct regarding noble gases? B) Low MP and BP. C) Low ionisation enthalpy and low Delta_(eg) H for neon D) High diffusion property with helium E) Except Delta_(i)H_(1) all other physical properties like BP. increases down the group

Assertion : Calgon is used in the manufacture of soft water used for laundry purpose Reason : Ca^(2+) and Mg^(2+) ions present in hardwater are rendered ineffective by calgon forming their soluble complexes. (I) If both assertion and reason are correct and reason is the correct explanation of assertion. (II) Both assertion and reason are correct but reason is not the correct explanation of assertion (III) If assertion is correct and reason is not correct (IV) Assertion is wrong and reason is correct

i) Rain water and séa, water differ in their behaviour towards soap. Give the difference and establish the chemistry behind this. ii) A water boiler in a factory burst due to high interior pressure. It was reported that the incident was occured due to certain dissolved salt in water used, As a chemistry student how will you explain this?

We are familiar with Newton's laws of motion. Using the Newton's second law,explain: (i)impulse momentum principle. (ii)Law of conservation of linear momentum.

Find the true statement/statements i. Delta_(eg)H is related to electron affinity (Ae) as per the equation Delta_(eg)H=-[Ae+5/2RT] ii. At absolute zero temperature, EGE and A_(e) are the same. iii. Delta_(eg)H_(2) of a number of elements is +ve. iv. Delta_(eg)H_(1) of Be, Mg, N and noble gases are -ve. v. A higher -ve value of Delta_(eg)H_(1) shows a higher electron affinity, but not always. vi. Delta_(eg)H_(1) is of N, O, F and Ne have a relatively lower -ve values as compound with the next group member. vii. Group 14 elements (except lead) have a higher -ve value of Delta_(eg)H_(1) compound with group 15 elements.

V PUBLICATION-The p-BLOCK ELEMENTS-QUESTION BANK
  1. Does the hydrolysis of 'XeF6' lead to a redox reaction?

    Text Solution

    |

  2. Explain i) Sulphur vapours, exhibits some paramagnetism ii) ClF, exi...

    Text Solution

    |

  3. Explain i Helium is used in inflating aeroplane tyres? ii. Solubility ...

    Text Solution

    |

  4. In the reaction 'A+2B+H2O gives C+2D. draw the structures of A, B,...

    Text Solution

    |

  5. Element A burns, in nitrogen to give an ionic compound B. The compound...

    Text Solution

    |

  6. An orange solid. 'X' on heating givés a green rešidue 'Y', water vapou...

    Text Solution

    |

  7. i Why HF acid is stored in wax coated glass bottles? ii Iodine is more...

    Text Solution

    |

  8. Bleaching of flowers by chlorine permanent while that by 'SO2', is te...

    Text Solution

    |

  9. A translucent white waxy solid A on heating in an inert atmosphere is ...

    Text Solution

    |

  10. Explain i. Oxides of nitrogen have open chain structures while those o...

    Text Solution

    |

  11. Explain i. It is advisable to grow a leguminous crop on a soil every t...

    Text Solution

    |

  12. Explain i) ozone layer acts as an umbrella for the earth against the h...

    Text Solution

    |

  13. Name the catalysts used in contact process. Write the optimum temperat...

    Text Solution

    |

  14. Explain i For the dilution of 'H2 SO4', water should not be added to c...

    Text Solution

    |

  15. i. HF exists a dimeric molecule ie. HF has higher viscocity or high bo...

    Text Solution

    |

  16. i. Neon is used in warming signal illuminations. ii. Neon is used in ...

    Text Solution

    |

  17. The reddish brown gas formed when nitric oxide is oxidised by air is

    Text Solution

    |

  18. Which of the following oxides is most acidic N2 O5 P2 O5 As2 O5 ...

    Text Solution

    |

  19. In 'NO3' ion,the number of bond pairs and lone pairs of electrons on ...

    Text Solution

    |

  20. The true statement for the acids of phosphorus, 'H3PO2, H3PO3 and H3...

    Text Solution

    |