Recent questions tagged solid-state

Which of the following statement is not true about amorphous solids ?

asked Apr 28, 2017 by meena.p

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Iodine molecules are held in the crystals lattice by _________

asked Apr 28, 2017 by meena.p

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Which of the following is an amorphous solid ?

asked Apr 28, 2017 by meena.p

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The sharp melting point of crystalline solids is due to ________

asked Apr 28, 2017 by meena.p

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Which of the following is not a characteristic of a crystalline solid ?

asked Apr 28, 2017 by meena.p

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Which of the following is true about the value of refractive index of quartz glass ?

asked Apr 28, 2017 by meena.p

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Which of the following condition favours the existence of a substance in the solid state ?

asked Apr 28, 2017 by meena.p

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Why is an increase in temperature observed on mixing chloroform with acetone ?

asked Nov 9, 2016 by meena.p

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Aluminium crystallizes in a cubic - packed structure . Radius of the atom in the metal is $125\;pm$ (i) What is the length of the side of the unit cell ? (ii) How many unit cells are there in $1\;cm^3$ of aluminium ?

asked Oct 25, 2016 by meena.p

1 answer

Why Nitrogen is a gas whereas phosphorous is a solid ?

asked Oct 13, 2016 by meena.p

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In basic solution, $CrO_4^{2–}$ oxidises $S_2O_3^{2–}$ to form $Cr(OH)_4^{–} \& SO_4^{2–}$. The volume of $0.15\; M CrO_4^{2–}$ required of react with $40\; ml$ of $0.225\;M \;S_2O_3^{2–}$ would be :

asked Jan 18, 2016 by meena.p

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In $Nacl$ crystal each b$cl^{-}$ ion is surrounded by

asked Sep 9, 2015 by meena.p

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In an antiflorite structure , cations occupy

asked Sep 9, 2015 by meena.p

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Total volume of atoms present in face - centered cubic unit cell of metal is (r is atomic radius)

asked Sep 9, 2015 by meena.p

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In a face-centered cubic lattice , a unit cell is shared equally by how many units cells?

asked Sep 9, 2015 by meena.p

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The appearance of colour in solid alkali metal halides is generally due to

asked Sep 9, 2015 by meena.p

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The fraction of total volume occupied by the atoms present in a simple cube is

asked Sep 9, 2015 by meena.p

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The crystal with metal deficiency defect is

asked Sep 8, 2015 by meena.p

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The coordination number of $Al$ in the crystalline state of $Alcl_3$ is

asked Sep 8, 2015 by meena.p

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Number of unit cells in $4\;g$ of $\times $ (atomic mass =40) Which crystallize in bcc pattern is $(N_A= Avogadro \; number)$

asked Sep 8, 2015 by meena.p

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The white $z_no$ turns yellow on heating because of

asked Sep 8, 2015 by meena.p

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The radius ratio in $CsCl$ is $0.93$. The expected lattice structure is

asked Sep 8, 2015 by meena.p

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The number of tetrahedral voids in the unit cell of a face centred cubic lattice of similar atoms is

asked Sep 8, 2015 by meena.p

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The number of hexagonal faces that are present in truncated octahedron is

asked Sep 8, 2015 by meena.p

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The conic radii of $Rb^+$ and $ I^-$ are $1.46\;A^{\circ}$ and $2.16\;A^{\circ}$ respectively . The most probable type of structure exhibited by it is

asked Sep 8, 2015 by meena.p

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The efficiency of packing is $68 \%$ in

asked Sep 8, 2015 by meena.p

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The ability of a given substance to assume two or more crystalline structure is called

asked Sep 8, 2015 by meena.p

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Which one of the following is a covalent crystal ?

asked Sep 8, 2015 by meena.p

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Which of the following statements about amorphous solids is incorrect?

asked Sep 8, 2015 by meena.p

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Density of a crystal remains unchanged as a result of

asked Sep 8, 2015 by meena.p

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To get n-type doped semiconductor , the impurity to be added to silicon should have the following numbers of valence electrons ?

asked Sep 8, 2015 by meena.p

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Relationship between atomic radius(r) and the edge length of a body centred cubic unit cell is

asked Sep 8, 2015 by meena.p

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In $Nacl$ crystal each $cl^{-}$ ion is surrounded by

asked Sep 8, 2015 by meena.p

1 answer

In an antifluorite structure , cations occupy

asked Sep 8, 2015 by meena.p

1 answer

In a face centred cubic (fcc) arrangement, the number of atoms per unit cell is

asked Sep 8, 2015 by meena.p

2 answers

If the distance between $Na^{+}$ and $cl^{-}$ions in sodium chloride crystal is $xpm$, the length of the edge of the unit cell is

asked Sep 8, 2015 by meena.p

1 answer

A p- type materialy is electrically

asked Sep 8, 2015 by meena.p

1 answer

A metallic crystal having bcc type staking pattern , what percentage of volume of this lattice is empty .

asked Sep 8, 2015 by meena.p

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A compound formed by element A and B crystallizes in the cubic. Structure where A atoms are at the coiners of the cube and B atoms are at face centers. The formula of the compound is

asked Sep 8, 2015 by meena.p

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In which of the following crystal alternate tetrahedral voids are occupied ?

asked Sep 8, 2015 by meena.p

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An conic compound is expected to have tetrahedral structure if $\large\frac{r^+}{r^-}$ lies in the range of

asked Sep 8, 2015 by meena.p

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A compound contains two types of atoms X and Y. It crystallizes in a cubic lattice with atoms X at the coiner of the unit cell and atoms Y at the body center. The simplest possible formula of this compound is

asked Sep 8, 2015 by meena.p

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Percentage of free space in cubic close packed structure and in body centered packed structure are respectively

asked Sep 8, 2015 by meena.p

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Sodium chloxide , Nacl usually crystallizes in a face centered cubic lattice . How many ions are in contact with any single $Na^{+}$ ion ?

asked Sep 8, 2015 by meena.p

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Which of the following is a molecular crystal ?

asked Sep 8, 2015 by meena.p

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What is the percentage efficiency of packing in case of a simple cubic lattice ?

asked Sep 8, 2015 by meena.p

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Anti ferromagnetic substance have not dipole alignment

asked Sep 8, 2015 by meena.p

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Zinc oxide on heating twins _________ colour .

asked Sep 8, 2015 by meena.p

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Zinc oxide on heating turns ___________ colour

asked Sep 7, 2015 by meena.p

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Name an element with which silicon should be doped to give n type semi- conductor ?

asked Sep 7, 2015 by meena.p

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