Unit cell of rhenium oxide is shown bellow. How many rhenium atoms are present i
ID: 485013 • Letter: U
Question
Unit cell of rhenium oxide is shown bellow. How many rhenium atoms are present in the unit cell? Which of the following compounds has the lowest boding point? Which of the following substances should be soluble in ? (1) (2) H_2 O (3) NaOH (4) Which is not a property or phenomenon associated with the liquid state' (1) cohesion and adhesion miscues (3) surface tension (4) unit cells Which one of the following substances will have both dispersion forces and dipole-dipole forces? (1) O_2 NCl_3 (3) Br_2 (4) PCl_2 Osmium OsO_4. is a soft crystal that meets at 40 degree C The liquid does not conduct electricity What Kind of crystal is this? (1) covalent crystal (2) molecular crystal (3) ionic crystal (4) metallic crystal Which of the following proper the presence of weak forces in a liquid? Which of the forces is the most important contributed to the high surface tension shown by water Which of the following liquids has the lowest vapor pressure at room temperature? bromine (BrExplanation / Answer
13. methane has lowest boiling point (option 1)
14. bromine is soluble in CCl4 (option 1)
15. unit cell is the property associated with liquid state (option 4)
16. NCl3 has both dispersion force and dipole-dipole force (option 2)
17. OsO4 is a molecular crystal (option 2)
18. large heat of vapourization indicate the presence of weak intermolecular forces (option 1)
19. ethyl chloride has small heat of vapourization (option 3)
20. dispersion forces will contribute to the high surface tension (option 2)
21. mercury has the lowest vapour at room temperture (option 3)
22. acetic acid will exhibit the strongest hydrogen boinding in the pure liquid state (option 1)
12. unit cell has one rhenium atom in the unit cell (option 1)
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