Only Chemistry Discussion Malik Xufyan 1st Year Chemistry Full Book Exercise Mcqs All Punjab Boards Pakistan Malik Xufyan 16 1st Year Chemistry Full Book Exercise MCQS Punjab Chapter No 1 BASIC CONCEPTS TEXT BOOK EXERCISE Q1 Select the most suitable answer from the given ones in each question i The mass of one mole of electrons is a Properties which depend upon mass b Arrangement of electrons in orbital c Chemical properties d The extent to which they may be affected in electromagnetic field ii Which of the following statements is not true a isotopes with even atomic masses are comparatively abundant b isotopes with odd atomic masses and even atomic number are comparatively abundant c atomic masses are average masses of isotopes d Atomic masses are average masses of isotopes proportional to their relative abundance iii Many elements have fractional atomic masses this is because a The mass of the atom is itself fractional b Atomic masses are average masses of isobars c Atomic masses are average masses of isotopes d Atomic masses are average masses of isotopes proportional to their relative abundance iv The mass of one mole of electrons is a 008mg b 0 55mg c 0 184mg d 1 673mg v 27g of Al will react completely with how much mass of O2 to produce Al2O3 a 8g of oxygen b 16g of oxygen c 32g of oxygen d 24g of oxygen vi The number of moles of CO2 which contain 8 0 g of oxygen a 0 25 b 0 50 c 1 0 d 1 50 vii The largest number of molecules are present in a 3 6g of H2 O b 4 8g of C2H5 OH c 2 8 g of CO d 5 4g of N2O5 viii One mole of SO2 contains a 6 02x1023 atoms of oxygen Only Chemistry Discussion 1st Year Chemistry Full Book Exercise MCQS Punjab b 18 1x1023 Molecules of SO2 c 6 02x1023 atoms of sulphur d 4 gram atoms of SO2 ix The volume occupied by 1 4 g of N2at STP is a 2 24 dm3 b 22 4dm3 c 1 12 dm3 d 112 cm3 x A limiting reactant is the one which a is taken in lesser quantity in grams as compared to other reactants b is taken in lesser quantity in volume as compared to the other reactants c give the maximum amount of the product which is required d give the minimum amount of the product under consideration Chapter No 2 EXPERIMENTAL TECHNIQUES IN CHEMISTRY TEXT BOOK EXERCISE Q 1 Multiple choice questions i Filtration process could be very time consuming if it were not aided by a gentle suction which is developed a if the paper covers the funnel upto its circumference b if the paper has got small sized pores in it c if the stem of the funnel is large so that it dips into the filtrate d if the paper fits tightly ii During the process of crystallization the hot saturated solution a is cooled very slowly to get large sized crystals b is cooled at a moderate rate to get medium sized crystals c is evaporated to get the crystals of the product d is mixed with an immiscible liquid to get the pure crystals of the product iii Solvent extraction is an equilibrium process and it is controlled by a law of mass action Only Chemistry Discussion 1st Year Chemistry Full Book Exercise MCQS Punjab b the amount of solvent used c distribution law d the amount of solute iv Solvent extraction method is a particularly useful technique for separation when the product to be separated is a non volatile or thermally unstable b volatile or thermally stable c non volatile or thermally stable d volatile or thermally unstable v The comparative rates at which the solutes move in paper chromatography depend on a the size of paper b Rf value of solutes c temperature of the experiment d size of the chromatographic tank used Chapter No 3 GASES TEXTBOOK EXERCISE Q1 Select the correct answer out of the following alternative suggestions i Pressure remaining constant at which temperature the volume of a gas will become twice of what it is at 0oC a 546oC b 200oC c 546 k d 273k ii Number of molecules in one dm3 of water is close to Only Chemistry Discussion 1st Year Chemistry Full Book Exercise MCQS Punjab a 6 02 22 4 x 1023 b 12 04 22 4 x 1023 c 18 22 4 x 1023 d 55 6 x 6 02 x 1023 iii Which of the following will have the same number of molecules at STP a 280cm3 of CO2 and 280 cm3 of N2 O b 11 2dm3 of O2 and 32 g of O2 c 44g of CO2 and 11 2 dm3 of CO d 28 g of N2 and 5 6 dm3 of oxygen iv If absolute temperature of a gas is doubled and the pressure is reduced to one half the volume of the gas will a remain unchanged b Increase four times c reduce to d be doubled v How should the conditions be changed to prevent the volume of a given gas from expanding when its mass is increased a Temperature is lowered and pressure is increased b Temperature is increased and pressure is lowers c Temperature and pressure both are lowered d Temperature and pressure both are increased vi The molar volume of CO2 is maximum at a STP b 127oC and 1 atm c 0oC and 2 atm d 273 oC 1 atm vii The order of the rate of diffusion of gases NH3 SO2 C12 and CO2 si a NH3 SO2 C12 CO2 b NH3 CO2 SO2 C12 c C12 SO2 CO2 NH3 viii Equal masses of methane and oxygen are mixed in an empty container at 25 oC The fraction of total pressure exerted by oxygen is Only Chemistry Discussion 1st Year Chemistry Full Book Exercise MCQS Punjab a 1 3 b 8 9 c 1 9 d 16 17 viii Gases deviate from ideal behavior at high pressure Which of the following is correct for non ideality a At high pressure the ga molecules move in one direction b At high pressure the collision between the gas molecules are increased manifold c At high pressure the intermolecular attractions become d At high pressure the intermolecular attractions become only significant significant ix The deviation of a gas from ideal behavior is maximum at a 10oC and 5 0atm b 10oC and 2 0atm c 100 oC and 2 0 atm d 0 oC and 2 0atm xi A real gas obeying van der Waals equation will resemble ideal gas if a both a and b are larger b both a and b are small c a is small and b is larger d a is larger and b is small Chapter 4rth LIQUIDS AND SOLIDS TEXT BOOK EXERCISE Q 1 Multiple choice questions London dispersion forces are the only forces present among the a molecules of water in liquid state b atoms of helium in gaseous state at high temperature c molecules of solid …