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Q. No.Iron exhibits bcc structure at room temperature. Above 900 °C, it transforms to fcc structure. The ratio of density of iron at room temperature to that at 900 °C is:
(Molar mass and atomic radii of iron remain constant with temperature)
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe incorrect statement among the following is -
| 1. | Density decreases in case of crystals with Schottky's defect. |
| 2. | NaCl(s) is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal. |
| 3. | Frenkel defect is favoured in those ionic compounds in which sizes of cations and anions have large difference. |
| 4. | \(Fe_{0.98}O\) has non stoichiometric metal excess defect. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion (Ca2+) and fluoride ion (F-) are:
1. 4 and 2
2. 6 and 6
3. 8 and 4
4. 4 and 8
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology(NA= 6.02 X 1023 mol-1)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPrefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect Chapter Topics:
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Q. No.
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