Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 37

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If $NaCl$ is doped with $10^{- 4}$ $mol %$ of ${SrCl}_{2}$ , the concentration of cation vacancies will be $(N_{A} = 6.02 \times 10^{23} mo 1^{- 1})$ .

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Important Questions on States of Matter: Solid State

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Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 38

The crystal with metal deficiency defect is

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Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 39

Experimentally it was found that a metal oxide has formula

M_{0 . 98} O

. Metal

M

is present as

M^{2 +}

and

M^{3 +}

in its oxide. Fraction of the metal which exists as

M^{3 +}

would be

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Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 40

Which type of defect has the presence of cations in the interstitial sites ?

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Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 41

Substance which is weakly repelled by a magnetic field is

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Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 42

Which of the following metal oxides is anti-ferromagnetic in nature ?

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Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 43

The energy gap

(Eg)

between valence band and conduction band for diamond, silicon and germanium are in the order

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Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 44

Which of the following compound is metallic and ferromagnetic ?

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Pradeep's Chemistry Vol 1>Chapter 6 - States of Matter: Solid State>Competition Focus>Q 45

For which crystal anion-anion contact is valid ?