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Crystal Lattice Free Doubts and Solutions

CBSE - XII Science - Chemistry - The Solid State

What is the formula of a compound in which the element Y forms hcp lattice and atoms of X occupy 2/3rd of tetrahedral voids

Asked by upasana.sobti 16th January 2019, 1:59 PM
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CBSE - XII Science - Chemistry - The Solid State

CBSEXII| CHEMISTRYMOST IMPORTANT QUESTIONSwww.topperlearning.com2CBSEClass XII ChemistryMost Important QuestionsChapter 1: The Solid State1.What is the formula of a compound in which the element Y forms hcp lattice and atoms of X occupy 2/3rdof tetrahedral voids?[1M]2.Givean example each of a molecular solid and an ionic solid.[1M]3.An element with density 2.8gcm-3forms a fccunit cellwith edgelength 4 × l0-8cm. Calculate the molar mass of the element.[2M](Given: NA=6.022 × 1023mol-1)4.[2M](i)What type of non-stoichiometric point defect is responsible for the pink colour of LiCl?(ii)What type of stoichiometric defect is shown by NaCl? 5.How will you distinguish between the following pairs of terms?[2M](i)Tetrahedral and octahedral voids(ii)Crystal lattice and unit cell 6.Tungsten crystallizes in body centred cubic unit cell. If the edge of the unit cell is 315.5pm, what is the radius of tungsten atom? [3M]7.Iron has a body centred cubic unit cell with a cell dimension of 286.65 pm,the density of iron is 7.874 gcm-3. Use this information to calculate Avogadro's number. (At.Mass of Fe = 55.845 μ).[3M]8.An element with density 10 gcm−3forms a cubic unit cell with edge length of 3 × 10−8cm. What is the nature of the cubic unit cell if the atomic mass of the element is 81 gmol−1? [3M] CBSEXII| CHEMISTRYMOST IMPORTANT QUESTIONSwww.topperlearning.com39.(a)An element has a body centered cubic structure with a cell edge of 288 pm. Thedensity of the elements is 7.2 gcm-3. Calculate the number of atoms present is 208 g of the element.[3M](b) With example explain difference between crystalline and amorphous solids. [2M]Chapter 2: Solutions1.A 1.00 molal aqueous solution of trichloroacetic acid (CCl3COOH) is heated to its boiling point. The solution has the boiling

Asked by Harsh.1102.raj 10th January 2019, 9:23 AM
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CBSE - XII Science - Chemistry - The Solid State

An element X' (At. mass a 40 g mol-1) having f.c.c. structure, has unit cell edge length of 400 pm. Calculate the density of ‘X’ and the number of unit cells in 4 g of ‘X’. (NA = 6.022 x 1023 mol-1)

Asked by raul.chintakindi14 14th March 2018, 11:44 AM
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CBSE - XII Science - Chemistry - The Solid State

a unit cell consits of a cube in which anions B are present at each corner and cations A at the centre of the center of the alternate faces of the unit cell .what is the simplest formula  of the compound ?

Asked by vasturushi 18th July 2017, 12:58 PM
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CBSE - XII Science - Chemistry - The Solid State

in a face centered cubic arrangement of A and B ,A are present at the corners of the unit cell and B are present at the face centeres.If one atom of A is missing from its position at the corner , what is the formula of the compound?

Asked by vasturushi 18th July 2017, 12:06 PM
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CBSE - XII Science - Chemistry - The Solid State

why does magnesium show hcp but not copper

Asked by banga71 14th April 2017, 10:53 AM
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CBSE - XII Science - Chemistry - The Solid State

why deos magnesium show hcp but not copper

Asked by banga71 14th April 2017, 10:52 AM
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CBSE - XII Science - Chemistry - The Solid State

An alloy of copper, gold, silver is found to have Cu atoms forming simple cubic lattice. If Ag atoms occupy all the face centres and Au atoms at the body centres what is the simplest formula of the alloy?

Asked by rajuharan 26th January 2017, 6:46 PM
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CBSE - XII Science - Chemistry - The Solid State

What is the volume occupied in body centered cube.

Asked by Topperlearning User 16th June 2016, 3:56 PM
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CBSE - XII Science - Chemistry - The Solid State

Show in case of body centered cube only 68% the space is occupied and rest is unoccupied.

Asked by Topperlearning User 16th June 2016, 3:54 PM
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CBSE - XII Science - Chemistry - The Solid State

Show that 74% space is occupied in case of face centered cube.

Asked by Topperlearning User 16th June 2016, 3:38 PM
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CBSE - XII Science - Chemistry - The Solid State

How many octahedral voids and tetrahedral voids are formed in one cube.

Asked by Topperlearning User 16th June 2016, 3:37 PM
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CBSE - XII Science - Chemistry - The Solid State

Define packing efficiency.

Asked by Topperlearning User 16th June 2016, 3:36 PM
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CBSE - XII Science - Chemistry - The Solid State

Compare the space available in the two types of voids formed in the solids.

Asked by Topperlearning User 16th June 2016, 3:36 PM
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CBSE - XII Science - Chemistry - The Solid State

How many atoms constitute one unit cell of a face-centered cubic crystal?

Asked by Topperlearning User 16th June 2016, 3:32 PM
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CBSE - XII Science - Chemistry - The Solid State

in a solid AB having the NACL structure A atoms occupy the corners of the cubic unit cell. if all the face centred atoms along one of the axes are removed, then the resultant stiochiometry of the solid is show my steps

Asked by Farooq Ahmad 13th April 2016, 8:04 PM
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CBSE - XII Science - Chemistry - The Solid State

Silver crystallizes in fcc unit.Each side of the unit cell has a length of 409pm.What is the radius of silver atom ?

Asked by Pratik 10th October 2015, 12:07 PM
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CBSE - XII Science - Chemistry - The Solid State

what is octrahedral voids? explian in brief. 

Asked by Shubham 8th September 2015, 5:59 PM
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CBSE - XII Science - Chemistry - The Solid State

file: brief explanations about type of solid structure details of nacl,cscl,zns,cafe, antifluoride with diagram  
 

 what should written on this please tell me soon i have to make a file on this 

Asked by Seema Jain 5th June 2015, 7:17 AM
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CBSE - XII Science - Chemistry - The Solid State

bravais lattices that 14 unit cells  what are there names

Asked by Seema Jain 21st March 2015, 8:03 PM
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CBSE - XII Science - Chemistry - The Solid State

Sir, how can I prepare for chemistry exam in two days ? I need to include solving previous years papers and text book questions along with the usual preparation . 

Asked by jenusmail 26th February 2015, 5:30 PM
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CBSE - XII Science - Chemistry - The Solid State

what is defference between ccp & fcc ? are they same? however there co ordination no is same

Asked by Kalyanrao Chavan 28th July 2014, 11:52 AM
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CBSE - XII Science - Chemistry - The Solid State

what is defference between ccp & fcc ? are they same? however there co ordination no is same

Asked by Kalyanrao Chavan 28th July 2014, 11:52 AM
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CBSE - XII Science - Chemistry - The Solid State

If the radius of the cation is r present in octahedral void and radius of the anion in close- packing is R, derive relation between r and R.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Chemistry - The Solid State

In ionic compounds what is the criteria which ion will form the close packing.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Chemistry - The Solid State

Compare the most preferred packing of solids to the least preferred packing of solids.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Chemistry - The Solid State

Which is the least preferred type of close packing in crystals?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Chemistry - The Solid State

what are cordination number of voids?

Asked by 25th March 2008, 9:30 PM
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CBSE - XII Science - Chemistry - The Solid State

What is the difference between rhombic and monoclinic sulphur?

Asked by attma 20th March 2008, 8:53 PM
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CBSE - XII Science - Chemistry - The Solid State

why are frenkel defects not found in pure alkali halide?

Asked by 29th February 2008, 8:20 AM
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CBSE - XII Science - Chemistry - The Solid State

Difference

Asked by 28th February 2008, 12:41 PM
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CBSE - XII Science - Chemistry - The Solid State

SOLID STATE

Asked by 23rd February 2008, 10:28 AM
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CBSE - XII Science - Chemistry - The Solid State

SOLID STATE

Asked by 21st February 2008, 5:07 PM
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