MCQ1: One of the following pair cannot constitute suitable pair for n-type conductor? Answer: Antimony: Arsenic MCQ2: One of the following is not true about n-type conductor Answer: There is no chemical but physical interaction between the impurity and the semi conductor MCQ3: One of the following is not a right pair for p-type semi conductor Answer: Aluminium: indium MCQ4: One of the following is not associated with the conductivity of semi conductors due to doping Answer: o-type MCQ5: One of the following is not a class of crystal solids Answer: Hydrogen bonded MCQ6: One of the following does not describe the crystal structure of metallic solid Answer: Trigonal-close packing MCQ7: The unit of one of the following quantity is a derived unit Answer: Momentum of electron MCQ8: When iron metal corrodes, its colour changes to ____ Answer: Brown MCQ9: One of the following is not a chemical instrument Answer: Filter paper MCQ10: The pressure exerted by 0.5 cm3 of gas is 1 Pa at 273 K. If the temperature of the gas changes to 546 K and its pressure to 3 Pa, what will be the new volume of the gas Answer: 0.3 cm3 MCQ11: One of the following combination does not match for gas law Answer: Gay-Lussac law : Constant volume MCQ12: If 3.00 litre sample of gas at 1.00 atm is compressed to 0.600 litre at constant temperature. Calculate the final pressure of the gas Answer: 5.0 atm MCQ13: Calculate the volume which 6.00 litres of gas at 0 °C will occupy at 125°C at constant pressure Answer: 8.75 litres MCQ14: Calculate the volume occupy by 32 g of oxygen at stp Answer: 44.8 dm3 MCQ15: One of the following is not correct Answer: 1 atm = 1 Pa MCQ16: Calculate the volume occupied by 0.0660 kg of carbon (IV) oxide gas at a temperature of 300.2 K and a pressure of 9.41 x I0 Pa assuming ideal behaviour Answer: 0.0398m3 MCQ17: Hydrogen bonding may not affect the physical properties of one of the following molecules Answer: CsF MCQ18: Which of the following pair does not agrees with the kinetic theory of gases Answer: Temperature = Average collision MCQ19: The length of one axis of a cubic crystal is 0.05 cm. What is the length of the next minimum axis? Answer: 0.05 cm MCQ20: Which of the following is not true about Graham’s law Answer: Diffusion rate is proportional to density MCQ21: Use Dalton law to calculate the total vapour pressure exerted by a mixture of A and B if the following data were obtained; XA = 0.40, XB = 0.60, PA0 = 1710 mm/Hg and PB0 = 127 mm/Hg Answer: 760 mm/Hg MCQ22: Which of the following pair does not match? Answer: Hexagonal:K2O MCQ23: Which of the following pair does not match? Answer: Hexagonal: a=b=c MCQ24: Which of the following salts can form precipitate Answer: AgCl MCQ25: The value of the gas constant R is often expressed as I 987 cal moJ-1 K 1 • Obtain its value in SI units (Given 1 ca; = 4.184 J) Answer: 8.314 J/mol/K MCQ26: 16 g of oxygen gas occupies a volume of 22.4 dm3. Calculate the density of the gas Answer: 0.000714 g/dm3 MCQ27: The concentration of an acid in a sample can be estimated by ____ Answer: Titration MCQ28: Consider four gases whose densities are (i) 0.2, (ii) 0.4, (iii) 0.6 and (iv) 0.8 g/cm3. The order of diffusion will be Answer: i>ii>iii>iv MCQ29: The pressure of air in a system is 10 Pa and the volume occupied is 4 m3. If the the volume is increased to 16 m3, what will be the new pressure Answer: 2.5 pa MCQ30: The order of intermolecular distance among the three state of matter is __  Answer: Gas>liquid>solid MCQ31: The product of pressure and volume of a gas at 300 K is 500 Pam3. Calculate the number of moles of the gas Answer: 0.2 MCQ32: 2 moles of water was mixed with 3 moles of ethanol. The ratio of the mole fraction of ethanol to that of water is ____  Answer: 1.5 MCQ33: An ideal gas will not obey one of the following law Answer: Van der waal MCQ34: A real gas will obey one of the following law  Answer: Van der waal law MCQ35: A solute was dissolved in two separate immiscible solvent. If 2.0g of the salt dissolve in the first solvent and 4.0g dissolved in the second solvent. Calculate the partition coefficient if the two solution are combined together Answer: 0.5 FBQ1: Modern approach to chemistry deals with equilibrium properties, ability to change and ______ Answer: Structure FBQ2: Physical Chemistry is concern with two major aspects, namely ability to change and ­­­­­­­­­­_____ Answer: Equilibrium properties FBQ3: International system of unit or systeme internatwnale can be written as an acronym _______________ Answer: SI unit FBQ4: Temperature, length, time and mass are examples of ________ Answer: basic quantities FBQ5: Meter, kelvin, second and kilogram are examples of _______ Answer: Basic units FBQ6: A skilful process of identifying. substituting and using correct apparatusappropriately in the laboratory is called _____ Answer: Instrumentation FBQ7: Apparatus that arc basically used for determining the melting points of substances are called ____________ Answer: melting point tubes FBQ8: The Beckman thermometer IS used in the Beckman·s apparatus for dctem1inmg____ of a substance Answer: Freezing point FBQ9: _____ is an instrument that can be used to measure the strength of an acid or a base Answer: pH meter FBQ10: A homogenous materials that contain only one substance is called a ___________ Answer: pure substance FBQ11: Constituents in a solution can be separated by applying the principle of ___________ Answer: Equilibrium Fill in the Blank (FBQs) 11: The process of separating a pure substance from a solution is called _______ Answer: crystallization FBQ13: In a gas. the molecules on the average are separatedby large ______ distances Answer: Intermolecular FBQ14: -______is a state of matter that does not have a definite shape nor volume Answer: Gas FBQ15: At constant temperature, the gas law that is most suitable is called _____ law Answer: Boyle’s FBQ16: At constant pressure, properties of gases that undergo changes are _______ Answer: volume and temperature FBQ17: A gas that obeys all the gas laws is called an ______ Answer: ideal gas FBQ18: At high temperature and low pressure, gases tend to undergo phenomena that is called ___________ Answer: Expansion FBQ19: At low temperature and high pressure, gases tend to __________ Answer: Contract FBQ20: The temperature, above which a substances can exist only in gaseous state is called _________ Answer: Critical temperature FBQ21: The mathematical equation for Boyle’s law can be written as ___________ Answer: PV = constant FBQ22: The mathematical equation for Charles law can be written as ________ Answer: V/T = constant FBQ23: A plot showing the variation of volume with temperature at constant pressure is called _ Answer: An isobar FBQ24: An expression for the combined gas law can be expressed as ________ Answer: PV/T = constant FBQ25: The equation of ideal gas can be expressed as ______ Answer: PV = nRT FBQ26: Numerical value of the universal gas constant is ____ J/K/mol Answer: 8.314 FBQ27: The volume occupied by 1 mole of oxygen gas at s.t.p. is ________ dm3  Answer: 22.4 FBQ28: The individual pressure of a gas in a mixture of gases is called ______ Answer: Partial pressure FBQ29: The gas law that consider the total pressure of a gas as a function of the pressures exerted by the individual gases that make up the mixture is __________ Answer: Dalton law of partial pressure FBQ30: For 1 mole of an ideal gas, a plot of PV against T will give a straight line whose slope is equal to __________ Answer: 8.314 FBQ31: The rate at which gases diffuse is inversely proportional to the Square root of their ____________ Answer: Densities FBQ32: The gas law that explain the effusion of gas is ____________ Answer: Graham law FBQ33: Gas molecules confined to a container are in a state of ____________ motion Answer: Constant FBQ34: At relatively low pressure, there are no ___________ forces between gas molecules Answer: Intermolecular FBQ35: _________ of a gas is proportional to the mean kinetic energy of the molecules in a gas Answer: Absolute temperature