CIE Physical Chemistry Quizz 1 Welcome to your CIE Physical Chemistry Quizz 1 What is the concentration of the solution when 16g of sodium chloride is dissolved in 250 cubic centimeters of water? 1.09M 0.9 M 0.001M 0.1M Avogadro's Constant can be used for atoms, molecules and ions atoms and ions only atoms and molecules only molecules and ions only How many atoms of magnesium are present in 18g sample of magnesium metal? 4.52x10^23 6.022x10^23 4.10 x10^22 0.75x10^23 What is the bond angle of H-O-H in water? 104.5˚ 107˚ 120˚ 90˚ Isotopes have similar chemical properties because they have the same electronic structure average mass molecular mass atomic mass Three isotopes of a newly discovered element X are 117-X (relative abundance 15), 119-X (relative abundance 25) and 121-X (relative abundance 60). What is the relative atomic mass of element X? 119,9 0,179 120 118,3 Atomic mass of the ion of an element A+ is 23 and it has 10 electrons. How many protons, neutrons and electrons are present in the neutral atom A? 11 protons, 12 neutrons, 11 electrons 11 protons, 12 neutrons, 10 electrons 10 protons, 13 neutrons, 10 electrons 12 protons, 11 neutrons, 11 electrons One mole of gaseous atoms forms one mole of gaseous ions with a single positive charge in __________? First ionisation energy second ionisation energy third ioniation energy ionisation energy of a gas Which of the following is not true about ionization energies of an element? Difference between successive ionization energies of an element is uniform It is defined for gaseous atoms It is affected by distance of electron from nucleus It decreases down a group What is the correct order of energies of subshells? 1s < 2s < 2p < 3s < 3p < 4s < 3d 1s > 2s > 2p > 3s > 3p > 3d > 4s 1s < 2s < 2p < 3s < 3p < 3d < 4s 1s > 2s > 2p > 3s > 3p > 4s > 3d How many atomic orbitals are there is d subshell? 5 10 3 6 What is the bond angle of H-O-H in water? 104.5˚ 107˚ 120˚ 90˚ Which of the following statements is correct?I. Polar molecules are symmetricalII. Non polar molecules can contain polar bondsIII. Van der waals forces occur due to temporary dipoles II and III only I, II and III I and III only I and II only What type of bonding exists in ammonium chloride (NH4Cl)? Ionic, covalent, dative covalent Ionic, covalent Ionic, dative covalent Covalent, dative covalent Calculate the mass of nitrogen gas that has a pressure of 100 kPa, temperature 25 degree centigrate , volume 500 cubic centimeters? (R = 8.31) 0.56g 1g 0.0202g 0.2g Time is Up!