Home
Class 12
CHEMISTRY
Sulphur shower produces yellow clouds in...

Sulphur shower produces yellow clouds in pine forests in May in hills. It is due to

A

See- saw geometry

B

High polarization power

C

Least steric hindrance

D

Dimeric in nature

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST 24

    AAKASH INSTITUTE ENGLISH|Exercise Example|15 Videos

  • Mock test 27

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|45 Videos

Similar Questions

Explore conceptually related problems

Sulphur shower is due to

In the months of April and May one can see a yellow sulphur like dust floating in the Himalayan pine forests. What is it due to ?

The phenomenon of sulphur shower in pine forest is due to

The yellow colour of ZnO and Conducting nature produced on heating is due to

Chlorine water loses its yellow colour on standing because: (a) HCl gas is produced,due to the action of sunlight. (b) a mixture of HOCl and HCl is produced in the presence of light (c) HOCl and hydrogen gas is produced (d) a mixture of HCl and ClO_(3) is produced,due to the action of sunlight

Read the given statements and select the correct option. Statement 1 : Reforestation is the process of restoring a forest that once existed but was removed at some point of time in the past. Statement 2: Reforestation may occur naturally in a deforested area, however it can be speeded up by planting trees with due consideration to biodiversity that earlier existed in that area.

In an ideal crystal, the entropy of the constituents at absolute zero temperature (0K) is zero. However, the crystals generally suffer from certain defects also called imperfections They may be both electronic and atomic in nature. The atomic imperfections may be stoichiometric (Schottky and Frenkel defects) or non-stoichiometric (metal excees and metal deficiency defects). In addition to these, there are impurity defects which are caused by the addition of certain impurities of metals and this is known as dopping. The dopping leads to semi conductors which may be either n-type or p-type in nature. Zinc oxide (ZnO) is white when cold and yellow when hot. It is due to the development of :

When an atom or an ion is missing from its normal lattice site, a lattice vacancy (Schottky defect) is created. In stoichimetric ionic crystals, a vacancy of one ion has to be accompanied by the vacancy of the oppositely charged ion in order to maintain electrical neutrality. In a Frenkel defect an ion leaves its position in the lattice and occupies an interstitial void. This is the Frenkel defect commonly found along with the Schottky defects and interstitials. In pure alkali halides, Frenkel defects are not found since the ions cannot get into the interstitial sites. Frenkel defects are found in silver halides because of the small size of the Ag^(+) ion. Unlike Schottky defects, Frenkel defects do not change the denstiy of the solids. In certain ionic solids (e.q. AgBr) both Schottky and Frenkel defects occur. The defects discussed above do not disturb the stoichiometry of the crystalline material. There is large variety of non-stoichiomertic inorganic solids which contain an excess or deficiency of one of the elements. Such solids showing deviations from the ideal stoichiometric composition from an inmportant group of solids. For example in the vanadium oxide, VO_(x) , x can be anywhere between 0.6 and 1.3. There are solids which are difficult to prepare in the stoichiometric composition. Thus, the ideal composition in compounds such as FeO is difficult to obtain (normally we get a composition of Fe_(0.95)O but it may range from Fe_(0.93)O " to " Fe_(0.96)O ). Non-stoichiometric behaviour is most commonly found for transition metal compounds though is also known for some lanthanoids and actinoids. Zinc oxide loses oxygen reversibly at high temperature and turns yellow in colour. The excess metal is accommodated interstitially, giving rise to electrons trapped in the neighbourhood. The enhanced electrical conductivity of the non-stoichiometric ZnO arises from these electrons.ltrbgt Anion vacancies in alkali halides are produced by heating the alkali halide crystals in an atmosphere of the alkali metal vapur. When the metal atoms deposit on the surface they diffuse into the crystal and after ionisation the alkali metal ion occupies cationic vacancy whereas electron occupies anionic vacancy. Electrons trapped in anion vacancies are referred to as F-centers (from Farbe the German word for colour) that given rise to interesting colour in alkali halides. Thus, the excess of potassium in KCl makes the crytal appear violet and the excess of lithium in LiCl makes it pink. Stongly heated ZnO crystal can conduct electricity. This is due to

When an atom or an ion is missing from its normal lattice site, a lattice vacancy (Schottky defect) is created. In stoichimetric ionic crystals, a vacancy of one ion has to be accompanied by the vacancy of the oppositely charged ion in order to maintain electrical neutrality. In a Frenkel defect an ion leaves its position in the lattice and occupies an interstitial void. This is the Frenkel defect commonly found along with the Schottky defects and interstitials. In pure alkali halides, Frenkel defects are not found since the ions cannot get into the interstitial sites. Frenkel defects are found in silver halides because of the small size of the Ag^(+) ion. Unlike Schottky defects, Frenkel defects do not change the denstiy of the solids. In certain ionic solids (e.q. AgBr) both Schottky and Frenkel defects occur. The defects discussed above do not disturb the stoichiometry of the crystalline material. There is large variety of non-stoichiomertic inorganic solids which contain an excess or deficiency of one of the elements. Such solids showing deviations from the ideal stoichiometric composition from an inmportant group of solids. For example in the vanadium oxide, VO_(x) , x can be anywhere between 0.6 and 1.3. There are solids which are difficult to prepare in the stoichiometric composition. Thus, the ideal composition in compounds such as FeO is difficult to obtain (normally we get a composition of Fe_(0.95)O but it may range from Fe_(0.93)O " to " Fe_(0.96)O ). Non-stoichiometric behaviour is most commonly found for transition metal compounds though is also known for some lanthanoids and actinoids. Zinc oxide loses oxygen reversibly at high temperature and turns yellow in colour. The excess metal is accommodated interstitially, giving rise to electrons trapped in the neighbourhood. The enhanced electrical conductivity of the non-stoichiometric ZnO arises from these electrons.ltrbgt Anion vacancies in alkali halides are produced by heating the alkali halide crystals in an atmosphere of the alkali metal vapur. When the metal atoms deposit on the surface they diffuse into the crystal and after ionisation the alkali metal ion occupies cationic vacancy whereas electron occupies anionic vacancy. Electrons trapped in anion vacancies are referred to as F-centers (from Farbe the German word for colour) that given rise to interesting colour in alkali halides. Thus, the excess of potassium in KCl makes the crytal appear violet and the excess of lithium in LiCl makes it pink. When LiCl is heated into the vapour of lithium, the crystal acquires pink colour. This is due to

AAKASH INSTITUTE ENGLISH-MOCK TEST 25-Example
  1. Which of the following interhalogen compound is a gas at 298K?

    Text Solution

    |

  2. Which of the following statements regarding sphaerosomes is not correc...

    Text Solution

    |

  3. Which of the following hydrogen halide is liquid at 273K?

    Text Solution

    |

  4. The correct order of decreasing acidic strength of oxyacids of group 1...

    Text Solution

    |

  5. Sulphur shower produces yellow clouds in pine forests in May in hills....

    Text Solution

    |

  6. Dispersion of tear gas happens during riots, the formula of tear gas i...

    Text Solution

    |

  7. Which of the following oxoacids of halogen doesn't exist

    Text Solution

    |

  8. In vapour state, sulphur (S2) shows paramagnetic behaviour due to

    Text Solution

    |

  9. Which of the following are extensive properties ?

    Text Solution

    |

  10. The shape of BrF3 molecule is slightly bent 'T' , because

    Text Solution

    |

  11. Which of the following order is incorrect?

    Text Solution

    |

  12. Identify the incorrect statement with respect to ozone.

    Text Solution

    |

  13. Incorrect statement is :

    Text Solution

    |

  14. Noble gases do not react with other elements because

    Text Solution

    |

  15. Which one of the following reactions of xenon compounds is not feasibl...

    Text Solution

    |

  16. In which of the following , central atom does not have one lone pairs ...

    Text Solution

    |

  17. Name of the synthetic radioactive element of group 16 having atomic nu...

    Text Solution

    |

  18. What will be the correct order of size for the given elements ?

    Text Solution

    |

  19. The complete hydrolysis of which of the following compounds of Xe is a...

    Text Solution

    |

  20. Which among the following elements will have a positive electron gain ...

    Text Solution

    |