Chemistry Fsc Part 1 Chapter 4 Online Test With Answers

image
image
image

Chemistry Fsc Part 1 Chapter 4 Online Test

Sr. # Questions Answers Choice
1 In order to mention the oiling point of water at 110 oC, the external pressure should be. Between 760 torr and 1200 torr Between 200 torr and 760 torr 765 torr Any value of pressure
2 When water freezes at 0 oC, its density decrease due to. Cubic structure of ice Empty spaces present in the structure of ice Change of bond lengths Change of bond angles
3 NH3 shows a maximum boiling point among the hydrides of the group V elements due to. Very small size of nitrogen Long pair of electrons present on nitrogen Enhanced electronegative character of nitrogen Pyramidal structure of NH3
4 Select the correct answer out of the following alternative suggestions London dispersion forces are the only forces present among the. Molecules of water in liquid state Atoms of helium is gaseous state at high temperature. Molecules of solid I2 Molecule of H-Cl gas
5 The molecules of CO2 i dry ice form the. Ionic crystals Molecular crystals Amorphous Covalent crystals
6 Diamond is bad conductor because. It has a tight structure It has a high density It is transparent to light There are o free electros present in the crystal of diamond to conduct electricity.
7 The lightest value of lattice energy is for which one of these ionic compounds. NaI NaF NaBr NaCl
8 Ionic solid are characterized by. Low melting point Good conductivity in solid state High vapours pressure solubility in polar solvent
9 Crystal to diamond is. Ionic Molecular Covalent Metallic
10 Allotropy is the property of. Compound Element Atom Mixtuer
11 Which is pseudo solid CaF2 Glass NaCl CaCl2
12 NH3 shows a maximum boiling point among the hydrides of V-A group elements due to. Very small size of nitrogen Lone pair of electron present on nitrogen enhanced electronegative character of nitrogen Pyramidal structure of NH3
13 The boiling point of pure water at 1 atm pressure is. 98<sup>o</sup>C 100<sup>o</sup>C 69<sup>o</sup>C 120<sup>o</sup>C
14 The boiling point of water at Murree Hills. 90<sup>o</sup>C 98<sup>o</sup>C 100<sup>o</sup>C 120<sup>o</sup>C
15 The boiling point of water at the top mount Everest is. 59<sup>o</sup>C 69<sup>o</sup>C 83<sup>o</sup>C 75<sup>o</sup>C
16 The distillation of liquid under reduced pressure is called. Destructive distillation Vaccum distillation Simple distillation Fractional distillation
17 The boiling point of glycerin at one atm is. 280 <sup>o</sup>C 290 <sup>o</sup>C 100 <sup>o</sup>C 110 <sup>o</sup>C
Download This Set
×