Calculate the value of Avogadro number from the internuclear distance of adjacent ions in `NaCl, 0.282 nm` and the density of solid `NaCl` is `2.17xx10^(3)kg//m^(3)` . A unit cell contains `4 NaCl` formula units.
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In Avogadro’s constant 6.022 × 10^(23) mol^(-1), the number of significant figures is ……….
Option : b. 4
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For the coagulation of 200 mL of `As_(2)S_(3)` solution, 10 mL of 1 M NaCl is required. What is the coagulating value of NaCl.
Correct Answer - C 10 ml of 1 M NaCl contains NaCl =10 x1=10 milli mole 200 ml of `As_2S_3` required NaCl for the coagulation =10 milli mole `:.` 1000 ml...
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In the zinc blende structure, zinc ions occupy alternate tetrahedral voids and `S^(2-)` ions exist as ccp the radii of `Zn^(2+)` and `S^(2-)` ions are
Correct Answer - D `r_+/(r_(-))` gt0.414 `implies a=4/sqrt3(r_+ +r_-)=4/sqrt3(0.83+1.74)=5.935 Å ~~ 5.94 Å`
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Calculate the mass of `Hg_(2)Cl_(2)` which can be propared by the reduction of mercury (II) ions in the presence of chloride ions by the passage of 5.
Correct Answer - 132.34 g `2Hg^(2+)+2Cl^(-)+underset(2 F)(2e^(-)) rarr underset("1 mole")(Hg_(2)Cl_(2))`
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If internuclear distance between `A` atoms in `A_(2)` is `10 Å` and between `B` atoms in `B_(2)` is `6Å`, then calculate internuclear distance between
Correct Answer - 8 `r_(A)+r_(A) =10 Å ..(i)` `r_(B) +r_(B) = 6Å …(ii)` (i) +(ii) `2(r_(A)+r_(B)) = 16Å` `r_(A) +r_(B) = 8Å`
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A body of density d is counterpoised by Mg of weights of density `d_1` in air of density d. Then the true mass of the body is
Correct Answer - D Let `M_(0)` = mass of body in vacuum. Apparent weight of the body in air = Apparent weight of standard weights in air implies Actual weight -...
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If internuclear axis is y then `pi-` bond is form by-
`pi` bond is form by `p_(x)+p_(x)` and `p_(z)+p_(z)` orbitals
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A body `-` centred cubic lattice is composed of anions `Q` and cations `P`, where ions `Q` occupy the corners and ions `P` occupy the centre. `(i)` Wh
Correct Answer - `(i) PQ, (ii) P=8,Q=8;`
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Potassium fluoride `(KF)` has `NaCl` structure . Its density is `2.48g cm^(-3)` and its molar mass is `58g mol^(-1)`. Compute the distance between `K^
Correct Answer - `268.7;`
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The number density of electrons and holes in intrinsic silicon at a given temperature is `4.94xx10^(10)cm^(-3)`. Calculate the resistivity and conduct
Correct Answer - `9xx10^(4)Omegacm, 11.1xx10^(-6)Scm^(-1)`
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