Cubic close packing arrangement is also ...

Cubic close packing arrangement is also referred to as:

Hexagonal close packing

Face centered cubic

Body centered cubic

None of these

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In HCP or CCP constituent particles occupy 74% of the available space. The remaining space (26%) in between the spheres remains unoccupied and is called interstitial voids or holes. Considering the close packing arrangement, each sphere in the second layer rests on the hollow space of the first layer, touching each other. The void created is called tetrahedral void. If R is the radius of the spheres in the close packed arrangement then, R (radius of tetrahedral void) = 0.225 R In a close packing arrangement, the interstitial void formed by the combination of two triangular voids of the first and second layer is called octahedral coid. Thus, double triangular void is surrounded by six spheres. The centre of these spheres on joining, forms octahedron. If R is the radius of the sphere. in a close packed arrangement then, R (radius of octahedral void = 0.414 R). If the anions (A) form hexagonal close packing and cations (C ) occupy only 2/3rd octahedral voids in it, then the general formula of the compound is

ICSE-SAMPLE PAPER 3 (CHEMISTRY) -QUESTIONS

Cubic close packing arrangement is also referred to as:
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Which alkyl halides react most readily by nucleophilic substitution ?
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Lucas test is used for distinction of :
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Sodium methoxide on heating with bromoethane gives
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Which one absorbs U.V. radiation in stratosphere?
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Which one of the following is an oxide ore ?
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The cell reaction is spontaneous or feasible when e.m.f. of the cell i...
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In a crystal, the atoms are located at the position of .... potential ...
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Designation of the pattern as AB, AB, AB...... etc., of successive ver...
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Which of the following is not a colligative property?
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Conductivity of a solution is directly proportional to:
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Identify the alloy containing a non-metal as a constitutent in it.
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Which of the following has lowest reducing character ?
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Alkyl halides undergo:
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