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The yellow colour in NaCl crystal is due to ____________.

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प्रश्न

The yellow colour in NaCl crystal is due to ____________.

पर्याय

  • excitation of electrons in F centers

  • reflection of light from Cl− ion on the surface

  • refraction of light from Na+ ion

  • all of the above

MCQ
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उत्तर

The yellow colour in NaCl crystal is due to excitation of electrons in F centers.

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पाठ 6: Solid State - Evaluation [पृष्ठ १९९]

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सामाचीर कलवी Chemistry - Volume 1 and 2 [English] Class 12 TN Board
पाठ 6 Solid State
Evaluation | Q 15. | पृष्ठ १९९

संबंधित प्रश्‍न

What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 1/3rd of tetrahedral voids?


What is meant by the term ‘coordination number’?


Which of the following parameters are correct for triclinic lattice?

(A) α = β = γ = 90° and a = b = c

(B) α ≠ β ≠ γ = 90° and a ≠ b ≠ c

(C) α = γ = 90°, β ≠ 90° and a ≠ b ≠ c

(D) α ≠ β ≠ γ ≠ 90° and a ≠ b ≠ c


In the complexes `[Fe(CN)_6]^(3-)` and `[pt(en) (H_2O)_2(NO_2 (Cl)^(2+)]``the respective oxidation numbers of central metal atoms are

1) +3 and +4

2) +6 and + 4

3) +6 and +3

4) +3 and + 3


For a crystal of sodium chloride, state the type of lattice in which it crystallises.


i)

Consider the following cell reaction at 298 K: [3]
2Ag+ + Cd → 2Ag + Cd2+
The standard reduction potentials (E°) for Ag+/Ag and Cd2-/Cd are 0.80 V and -0.40 V respectively:
(1) Write the cell representation.
(2) What will be the emf of the cell if the concentration of Cd2+ is 0.1M and that of Ag+ is 0.2 M?
(3) Will the cell work spontaneously for the condition given in (2) above?

(ii)

What is a buffer solution? How is it prepared? Explain the buffer action of a basic buffer with a suitable example.


Complete the following statement by selecting the correct alternative from the choices given: 

In a face-centered cubic lattice, atom (A) occupies the comer positions and atom (B) occupies the face centre positions. If one atom of (B) is missing from one of the face-centered points, the formula of the compound is:


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Crystals can be classified into basic crystal units, equal to ____________.


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