Q32. Match List-I with List-II:
List-I
(A) Impurity defect
(B) Metal excess defect
(C) Metal deficie

Q: What is the correct answer for CUET UG Chemistry Q32?

The correct answer is b. (A) Impurity defect: Occurs when foreign atoms are introduced into the crystal lattice. Example: NaCl doped with Sr²⁺, where Sr²⁺ replaces two Na⁺ ions, creating one cationic vacant site (IV).(B) Metal excess defect: Can occur when an anion is missing from its lattice site, creating an anionic vacancy that is occupied by an electron, known as an F-centre. Example: NaCl with anionic sites called F

Q: Q32. Match List-I with List-II: List-I (A) Impurity defect (B) Metal excess defect (C) Metal deficiency defect (D) Simple vacancy defect List-II (I) NaCl with anionic sites called F centres (II) FeO…

The correct answer is b. (A) Impurity defect: Occurs when foreign atoms are introduced into the crystal lattice. Example: NaCl doped with Sr²⁺, where Sr²⁺ replaces two Na⁺ ions, creating one cationic vacant site (IV).(B) Metal excess defect: Can occur when an anion is missing from its lattice site, creating an anionic vacancy that is occupied by an electron, known as an F-centre. Example: NaCl with anionic sites called F

Q: What are the options for this CUET UG Chemistry question?

A. (A)-(III), (B)-(II), (C)-(I), (D)-(IV) · B. (A)-(IV), (B)-(I), (C)-(II), (D)-(III) · C. (A)-(II), (B)-(I), (C)-(II), (D)-(IV) · D. (A)-(I), (B)-(II), (C)-(IV), (D)-(III)

Question

Q32. Match List-I with List-II:
List-I
(A) Impurity defect
(B) Metal excess defect
(C) Metal deficiency defect
(D) Simple vacancy defect
List-II
(I) NaCl with anionic sites called F centres
(II) FeO with Fe3+
(III) Non-ionic solids and density of solid decreases
(IV) NaCl with Sr2+ and cationic vacant sites
Choose the correct answer from the options given below:
(a) (A)-(III), (B)-(II), (C)-(I), (D)-(IV)
(b) (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
(c) (A)-(II), (B)-(I), (C)-(II), (D)-(IV)
(d) (A)-(I), (B)-(II), (C)-(IV), (D)-(III)

FirstInTest · Accepted Answer

(A) Impurity defect: Occurs when foreign atoms are introduced into the crystal lattice. Example: NaCl doped with Sr²⁺, where Sr²⁺ replaces two Na⁺ ions, creating one cationic vacant site (IV).(B) Metal excess defect: Can occur when an anion is missing from its lattice site, creating an anionic vacancy that is occupied by an electron, known as an F-centre. Example: NaCl with anionic sites called F centres (I).(C) Metal deficiency defect: Occurs in compounds where metal ions can exhibit variable valency, resulting in some metal ions being in higher oxidation states to maintain charge neutrality when some metal ions are missing. Example: FeO with Fe³⁺ ions (II).(D) Simple vacancy defect: Occurs when some atoms/ions are missing from their lattice sites. This leads to a decrease in the density of the solid. It's common in non-ionic solids (III).Thus, the correct matching is (A)-(IV), (B)-(I), (C)-(II), (D)-(III).

Answer

(A)-(III), (B)-(II), (C)-(I), (D)-(IV)

Answer

(A)-(IV), (B)-(I), (C)-(II), (D)-(III)

Answer

(A)-(II), (B)-(I), (C)-(II), (D)-(IV)

Answer

(A)-(I), (B)-(II), (C)-(IV), (D)-(III)

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