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crystalline silicon was obtained by...

crystalline silicon was obtained by

A

Berzelius

B

Wohler

C

Winkler

D

Deville

Text Solution

Verified by Experts

The correct Answer is:
D
Deville.
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Crystalline solid

A crystalline solid

Knowledge Check

  • Silicon. The element silicon has two allotropic modification (a) Amorphous silicon (b) Adamantine silicon. A third allotropic modification has been observed and is of doubtful character known as graphitoidal silicon. Amorphous silicon is obtained by heating well-powdered quartz of finely silica with magnesium powder in a fireclay which is suitable for the manufacute of crucibles. SiO_(2)+2Mg to Si+2MgO The product is washed with dilute HCl to wash away MgO and then with hydrofluoric acid to remove uncharged silica. Crystalline silicon may be obtained by heating potassium silicon fluoride with

    A
    Al
    B
    C
    C
    Zn
    D
    Both (A) and (C )

  • A crystalline solid

    A
    Changes abruptly from solid to liquid when heated
    B
    Has no definete melting point
    C
    Undergoes deformation of its geometry easity
    D
    Has an irregular J- dimensional arrangements

  • Crystalline solids

    A
    have irregular shape.
    B
    definite geometrical shape.
    C
    gradually soften on heating.
    D
    do not have definite enthalpy of fusion.

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    Read the paragraph carefully and answer the following questions: Silicon is the second most abundant element occurring in earth crust. It is always found in combined state. It is obtained by reduction of silica and exists in two allotropic forms, i.e. amorphous and crystalline. Amorphous form is obtained by heating dry powdered silica with magnesium. Crystalline form is obtained by heating sand or quartz in a furnace. Silicon is used in manufacturing of certain alloys and polymers such as ferrosilicon, silicon bronze etc. The compounds of silicon are carborundum, silicone, silicates, glass etc. Silicones are organosilicon polymer and silicates are metal derivatives of silicic acid. While carborundum are obtained by heating mixture of sand, carbon and common salt. QWhich type of linkage is present in silicones?

    Silicon is second most abundant element occuring in earth crust it always found in combined state. It is obtained by reduction of silica. It exists in two allotropic forms amorphous and crystalline. Amorphous forms is obtained by heating dry powered silica with magnesium. Crystalline form is obtained by heating sand or quartz in an furnaces. Silicon is used in manufacture of certain alloys and polymers such as ferrosilicon, silicon benezne etc. The compounds of silicon are carborundum, silicons, silicates, glass etc. Silicons are organosilicon polymer and silicates are metal derivatives of salicic acid. While carborundum are obtained by heating mixture of sand carbon and salt. Which type of linkage present in silicones?

    Silicon is second most abundant element occuring in earth crust it always found in combined state. It is obtained by reduction of silica. It exists in two allotropic forms amorphous and crystalline. Amorphous forms is obtained by heating dry powered silica with magnesium. Crystalline form is obtained by heating sand or quartz in an furnaces. Silicon is used in manufacture of certain alloys and polymers such as ferrosilicon, silicon benezne etc. The compounds of silicon are carborundum, silicons, silicates, glass etc. Silicons are organosilicon polymer and silicates are metal derivatives of salicic acid. While carborundum are obtained by heating mixture of sand carbon and salt. (SiH_(3))_(3)N is weaker base than (CH_(3))_(3) N because:

    Silicon is second most abundant element occuring in earth crust it always found in combined state. It is obtained by reduction of silica. It exists in two allotropic forms amorphous and crystalline. Amorphous forms is obtained by heating dry powered silica with magnesium. Crystalline form is obtained by heating sand or quartz in an furnaces. Silicon is used in manufacture of certain alloys and polymers such as ferrosilicon, silicon benezne etc. The compounds of silicon are carborundum, silicons, silicates, glass etc. Silicons are organosilicon polymer and silicates are metal derivatives of salicic acid. While carborundum are obtained by heating mixture of sand carbon and salt. The structure unit of silicates is:

    Silicon is second most abundant element occuring in earth crust it always found in combined state. It is obtained by reduction of silica. It exists in two allotropic forms amorphous and crystalline. Amorphous forms is obtained by heating dry powered silica with magnesium. Crystalline form is obtained by heating sand or quartz in an furnaces. Silicon is used in manufacture of certain alloys and polymers such as ferrosilicon, silicon benezne etc. The compounds of silicon are carborundum, silicons, silicates, glass etc. Silicons are organosilicon polymer and silicates are metal derivatives of salicic acid. While carborundum are obtained by heating mixture of sand carbon and salt. When two structural units of silicates join along a corner of containing oxygen atom called as

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