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The p-Block Ele...

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  • Question 1
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    An element X forms an oxide $$XO_3$$. What is the valency of X?

  • Question 2
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    Sea weeds are an important source of :

  • Question 3
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    For the elements: $$Cl, Br, F, Al, C, Li, Cs$$ & $$Xe$$.
    Choose the best option. The element having 8 electrons in the outermost shell is:

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    The proof of oxidizing action of hydrogen peroxide in acid solution is in the formation of

  • Question 5
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    Which one of the following noble gases is least polarizable?

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    The bond in compound formed from combination of 14 group and 17 group elements of Periodic table will be ..............

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    Directions For Questions

    The chemistry of halogens is interesting. Halogens belong to the group 17 of the periodic table. The name Halogen was introduced by J.S.C. Schweiggen in 1811 to describe the property of chlorine (at that time unique among the elements) to combine directly with metals to give salts. Iodine is an essential trace element for humans and plays an important role in growth regulating hormone thyroxine, which is produced in the thyroid gland. Deficiency of iodine in diet leads to Goitre. In order to prevent this condition, about 0.01% $$NaI$$ is added to the table salt. Iodine is a lustrous solid and sublimes at ordinary temperature.

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    The sublimation of iodine is due to 

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    When a mixture of carbon monoxide and chlorine is exposed to sunlight the product formed is:

  • Question 9
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    At high temperature, nitrogen combines with $$CaC_2$$ to give___________.

  • Question 10
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    A piece of magnesium ribbon was heated to redness in an atmosphere of nitrogen and on cooling water was added the gas evolved was:

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