NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII01:THE SOLID STATE
318799
Among the following, incorrect statement is
1 The conductivity of metals decreases with increase in temperature.
2 The conductivity of semiconductors increases with increase in temperature.
3 There is no superconductor at room temperature.
4 Ionic solids conduct electricity due to presence of ions.
Explanation:
Ionic solids conduct electricity not due to presence of ions but due to the presence of defects.
CHXII01:THE SOLID STATE
318800
Statement A : Conductors are the solids with conductivities ranging between \(10^{4}\) to \(10^{7}\) ohm \({ }^{-1} \mathrm{~m}^{-1}\). Statement B : Metals posses conductivities in the order of \(10^{7} \mathrm{ohm}^{-1} \mathrm{~m}^{-1}\) are good conductors.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Conceptual Questions
CHXII01:THE SOLID STATE
318801
Which of the following oxides shows electrical properties like metals?
1 \(\mathrm{CrO}_{2}\)
2 \(\mathrm{SO}_{2}(s)\)
3 \(\mathrm{SiO}_{2}\)
4 \(\mathrm{MgO}\)
Explanation:
\(\mathrm{CrO}_{2}, \mathrm{TiO}\) and \(\operatorname{Re} \mathrm{O}_{3}\) are some typical metal oxides which show electrical conductivity similar to metal. While \(\mathrm{SiO}_{2}, \mathrm{MgO}\) and \(\mathrm{SO}_{2}\) are oxides of metal, semimetal and non-metal which do not show electrical properties.
NCERT Exemplar
CHXII01:THE SOLID STATE
318802
Which of the following oxides behaves as conductor or insulator depending upon temperature?
1 \(\mathrm{MgO}\)
2 \(\mathrm{TiO}\)
3 \(\mathrm{SO}_{2}\) (s)
4 \(\mathrm{TiO}_{3}\)
Explanation:
Certain metal oxides like \(\mathrm{VO}_{2}, \mathrm{VO}, \mathrm{VO}_{3}\) and \(\mathrm{TiO}_{3}\) show metallic or insulating property depending upon temperature. As temperature varies metallic or insulating property varies. This is due to variation in energy gap between conducting band and valence band.
318799
Among the following, incorrect statement is
1 The conductivity of metals decreases with increase in temperature.
2 The conductivity of semiconductors increases with increase in temperature.
3 There is no superconductor at room temperature.
4 Ionic solids conduct electricity due to presence of ions.
Explanation:
Ionic solids conduct electricity not due to presence of ions but due to the presence of defects.
CHXII01:THE SOLID STATE
318800
Statement A : Conductors are the solids with conductivities ranging between \(10^{4}\) to \(10^{7}\) ohm \({ }^{-1} \mathrm{~m}^{-1}\). Statement B : Metals posses conductivities in the order of \(10^{7} \mathrm{ohm}^{-1} \mathrm{~m}^{-1}\) are good conductors.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Conceptual Questions
CHXII01:THE SOLID STATE
318801
Which of the following oxides shows electrical properties like metals?
1 \(\mathrm{CrO}_{2}\)
2 \(\mathrm{SO}_{2}(s)\)
3 \(\mathrm{SiO}_{2}\)
4 \(\mathrm{MgO}\)
Explanation:
\(\mathrm{CrO}_{2}, \mathrm{TiO}\) and \(\operatorname{Re} \mathrm{O}_{3}\) are some typical metal oxides which show electrical conductivity similar to metal. While \(\mathrm{SiO}_{2}, \mathrm{MgO}\) and \(\mathrm{SO}_{2}\) are oxides of metal, semimetal and non-metal which do not show electrical properties.
NCERT Exemplar
CHXII01:THE SOLID STATE
318802
Which of the following oxides behaves as conductor or insulator depending upon temperature?
1 \(\mathrm{MgO}\)
2 \(\mathrm{TiO}\)
3 \(\mathrm{SO}_{2}\) (s)
4 \(\mathrm{TiO}_{3}\)
Explanation:
Certain metal oxides like \(\mathrm{VO}_{2}, \mathrm{VO}, \mathrm{VO}_{3}\) and \(\mathrm{TiO}_{3}\) show metallic or insulating property depending upon temperature. As temperature varies metallic or insulating property varies. This is due to variation in energy gap between conducting band and valence band.
318799
Among the following, incorrect statement is
1 The conductivity of metals decreases with increase in temperature.
2 The conductivity of semiconductors increases with increase in temperature.
3 There is no superconductor at room temperature.
4 Ionic solids conduct electricity due to presence of ions.
Explanation:
Ionic solids conduct electricity not due to presence of ions but due to the presence of defects.
CHXII01:THE SOLID STATE
318800
Statement A : Conductors are the solids with conductivities ranging between \(10^{4}\) to \(10^{7}\) ohm \({ }^{-1} \mathrm{~m}^{-1}\). Statement B : Metals posses conductivities in the order of \(10^{7} \mathrm{ohm}^{-1} \mathrm{~m}^{-1}\) are good conductors.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Conceptual Questions
CHXII01:THE SOLID STATE
318801
Which of the following oxides shows electrical properties like metals?
1 \(\mathrm{CrO}_{2}\)
2 \(\mathrm{SO}_{2}(s)\)
3 \(\mathrm{SiO}_{2}\)
4 \(\mathrm{MgO}\)
Explanation:
\(\mathrm{CrO}_{2}, \mathrm{TiO}\) and \(\operatorname{Re} \mathrm{O}_{3}\) are some typical metal oxides which show electrical conductivity similar to metal. While \(\mathrm{SiO}_{2}, \mathrm{MgO}\) and \(\mathrm{SO}_{2}\) are oxides of metal, semimetal and non-metal which do not show electrical properties.
NCERT Exemplar
CHXII01:THE SOLID STATE
318802
Which of the following oxides behaves as conductor or insulator depending upon temperature?
1 \(\mathrm{MgO}\)
2 \(\mathrm{TiO}\)
3 \(\mathrm{SO}_{2}\) (s)
4 \(\mathrm{TiO}_{3}\)
Explanation:
Certain metal oxides like \(\mathrm{VO}_{2}, \mathrm{VO}, \mathrm{VO}_{3}\) and \(\mathrm{TiO}_{3}\) show metallic or insulating property depending upon temperature. As temperature varies metallic or insulating property varies. This is due to variation in energy gap between conducting band and valence band.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
CHXII01:THE SOLID STATE
318799
Among the following, incorrect statement is
1 The conductivity of metals decreases with increase in temperature.
2 The conductivity of semiconductors increases with increase in temperature.
3 There is no superconductor at room temperature.
4 Ionic solids conduct electricity due to presence of ions.
Explanation:
Ionic solids conduct electricity not due to presence of ions but due to the presence of defects.
CHXII01:THE SOLID STATE
318800
Statement A : Conductors are the solids with conductivities ranging between \(10^{4}\) to \(10^{7}\) ohm \({ }^{-1} \mathrm{~m}^{-1}\). Statement B : Metals posses conductivities in the order of \(10^{7} \mathrm{ohm}^{-1} \mathrm{~m}^{-1}\) are good conductors.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Conceptual Questions
CHXII01:THE SOLID STATE
318801
Which of the following oxides shows electrical properties like metals?
1 \(\mathrm{CrO}_{2}\)
2 \(\mathrm{SO}_{2}(s)\)
3 \(\mathrm{SiO}_{2}\)
4 \(\mathrm{MgO}\)
Explanation:
\(\mathrm{CrO}_{2}, \mathrm{TiO}\) and \(\operatorname{Re} \mathrm{O}_{3}\) are some typical metal oxides which show electrical conductivity similar to metal. While \(\mathrm{SiO}_{2}, \mathrm{MgO}\) and \(\mathrm{SO}_{2}\) are oxides of metal, semimetal and non-metal which do not show electrical properties.
NCERT Exemplar
CHXII01:THE SOLID STATE
318802
Which of the following oxides behaves as conductor or insulator depending upon temperature?
1 \(\mathrm{MgO}\)
2 \(\mathrm{TiO}\)
3 \(\mathrm{SO}_{2}\) (s)
4 \(\mathrm{TiO}_{3}\)
Explanation:
Certain metal oxides like \(\mathrm{VO}_{2}, \mathrm{VO}, \mathrm{VO}_{3}\) and \(\mathrm{TiO}_{3}\) show metallic or insulating property depending upon temperature. As temperature varies metallic or insulating property varies. This is due to variation in energy gap between conducting band and valence band.