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