Que- The geometry of ammonia is
a. Tetrahedral
b. Square planner
c. Trigonal bipyramidal
d. Trigonal Pyramidal
Answer- Trigonal Pyramidal
Que- Orbitals of same energy produced after mixing of orbitals of different energy are called
a. Degenerate orbitals
b. Generate orbitals
c. Hybrid orbitals
d. Zeeman orbitals
Answer- Degenerate orbitals
Que- By combining n atmic orbitals no. of hybrid orbitals will be
a. 2n
b. n
c. 3n
d. impossible to predict
Answer- n
Que- on sp3 hybridization
a. All p-orbitals are involved
b. One s and 3 p-orbitals are involved
c. one p-orbital is involved
d. four p-orbitals are involved
Answer- One s and 3 p-orbitals are involved
Que- Geometry of simple molecule having sp3 hybrid orbital is
a. Triangular
b. Tetrahedral
c. Square planner
d. Linear
Answer- Tetrahedral
Que- Geometry of molecule will be pyramidal if the outer post shell of the central atom has
a. 3 bond pair one lone pair
b. 2 bond pair 2 lone pair
c. 1 bond pair 3 lone pair
d. 3 lone pair 1 bond pair
Answer- 3 bond pair one lone pair
Que- Pi bonds are produced by overlapping of
a. Un-hybrid orbitals
b. Hybrid orbitals
c. Hybrid and un hybrid orbitals
d. atomic orbital and hybrid orbital
Answer- Un-hybrid orbitals
Que- According to VESPR Model the geometry of molecule having 5 bond pair in outer most shell will be
a. Triangular
b. Square planner
c. Trigonal bipyramidal
d. Octahedral
Answer- Trigonal bipyramidal
Que- Molecular orbital which have higher energy than atomic orbitals is called
a. Bonding molecular orbital
b. Antibonding molecular orbital
c. Hybrid orbital
d. Super atomic orbital
Answer- Antibonding molecular orbital
Que- Unpaired electron in a molecule gives _________ character.
a. Ferromagnetic
b. Paramagnetic
c. Diamagnetism
d. Both a & b
Answer- Paramagnetic
Que- Bond order for N2 molecule is
a. 2
b. 1
c. 3
d. 4
Answer- 3
Que- Product of charge and distance is called
a. Pressure
b. Bond length
c. Work
d. Dipole moment
Answer- Dipole moment
Que- Unit of dipole moment is
a. Debye
b. Poise
c. Pascal
d. Newton
Answer- Debye
Que- The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is
a. 3
b. 7
c. 2
d. 5
Answer- 7
Que- Kc value has
a. No units
b. Units
c. Both a & b
d. None
Answer- Both a & b
Que- If a buffer solution of higher pH than seven is to be made we use
a. Strong acid and strong base
b. Weak acid and strong base
c. Weak acid and strong base
d. Weak acid and its salt with strong base
Answer- Weak acid and its salt with strong base
Que- Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH?
a. 0
b. 1
c. 2
d. any one
Answer- 2
Que- AgCl dissolved with conc (2x10-2) Ksp will be
a. 6 x 10-6
b. 6 x 10-5
c. 2 x 10-6
d. 4 x 10-4
Answer- 4 x 10-4
Que- In which of the following equilibria will Kc and Kp have the same value?
a. PCI5 = PCI3 + Cl2
b. N2 + 3H2 = 2NH
c. 2CO + O2 = CO2
d. N2 + O2 = 2NO
Answer- N2 + O2 = 2NO
Que- Which of the following will not change the concentration of ammonia at the equilibrium ?
a. Increase of pressure
b. Increase of volume
c. Addition of catalyst
d. Decrease of temperature
Answer- Addition of catalyst
Que- For a reaction involving only gases at 25Degree Centigrade the equilibrium constant can be expressed in terms of molarity Ke or partial pressure Kp. Which is true about the numerical value of Kp?
a. Kc is generally greaer than Kp
b. Kc is generally less than Kp
c. Kc is generally equal to Kp
d. Kc is equal to Kp if the total moles of reactants and products are equal
Answer- Kc is equal to Kp if the total moles of reactants and products are equal
Que- Which of following is not a base
a. KOH
b. NH3
c. PH3
d. BF3
Answer- BF3
Que- Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution?
a. 0002M HCI
b. 2 mole of NaCI with 0.2 mole of HNO3
c. 4 mole of CH3COOH with 0.4 mole of NaOH
d. 4 mole of NH3 with 0.2 mole of HCI
Answer- 4 mole of NH3 with 0.2 mole of HCI
Que- Which one of the following aqueous solutions will be basic?
a. NaCI
b. Na2SO4
c. Na2CO3
d. FeCl3
Answer- Na2CO3
Que- Reaction which proceeds in both directions is called
a. reversible
b. irreversible
c. spontaneous
d. non-spontaneous
Answer- reversible
Que- Chemical equilibrium state is
a. dynamic state
b. static state
c. free state
d. unidirectional state
Answer- dynamic state
Que- Conversion of reactant into product in unit time is called
a. rate of forward reaction
b. rate of backward reaction
c. rate constant
d. rate co-efficient
Answer- rate of forward reaction
Que- At start of reaction the concentration of reactants is
a. high
b. low
c. according to Kc
d. constant
Answer- high
Que- Unit of Kc is
a. moles2dm+6
b. moles-2dm+6
c. moles+2dm-6
d. Kc may or may not have units
Answer- Kc may or may not have units
Que- In case of gases Kc is replaced by
a. Ka
b. Kb
c. Kp
d. K
Answer- Kp
Que- Rate expression for ammonia synthesis is
a. Kc=x2/(a-x)(b-x)
b. Kc=x2/v(a-x)
c. Kc=4x2/(a-2x)2(b-x)
d. Kc=4x2v2/(a-x)(b-3x)3
Answer- Kc=4x2v2/(a-x)(b-3x)3
Que- When the value of Kc is very small then
a. reaction is at start
b. product conc. Is maximum
c. reactant conc. Is minimum
d. reaction is completed
Answer- product conc. Is maximum
Que- Catalyst used to speed up the reaction of ammonia synthesis is
a. V2O5
b. V2O5 and Pt
c. Fe
d. Pieces of Fe crystals are embedded in fused mixture of MgO Al2O3 and SiO2
Answer- Pieces of Fe crystals are embedded in fused mixture of MgO Al2O3 and SiO2
Que- Temperature for preparation of SO3 is
a. 400-500Degree Centigrade
b. 400Degree Centigrade
c. 600Degree Centigrade
d. 200Degree Centigrade
Answer- 400-500Degree Centigrade
Que- By the addition of base in waterpH will be
a. more than 7
b. less than 7
c. equal to 7
d. no effect
Answer- more than 7
Que- Idea of pH and pOH was put forward by
a. Gibbs
b. Einstein
c. Sorenson
d. Chadwick
Answer- Sorenson
Que- Negative log of mular concentration of H+ ions is called
a. pH
b. pOH
c. pKa
d. pKw
Answer- pH
Que- Ka<10-3 means
a. Very strong base
b. Very weak acid
c. Very strong acid
d. Very strong salt
Answer- Very weak acid
Que- Any substance which accepts H+ is base favours the concept
a. Lowrys
b. Lewis
c. Arrhenius
d. None of these
Answer- Lowrys
Que- Conjugated base of a weak acid is
a. weak
b. strong
c. moderately weak
d. unstable
Answer- strong
Que- When sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called
a. common ion effect
b. solubility product
c. dissociation constant
d. dissociation constant for an acid
Answer- solubility product
Que- Solution having the property of a very little change in pH on adding a small amount of strong acid or base is called
a. buffer solution
b. normal solution
c. standard solution
d. neutral solution
Answer- buffer solution
Que- Addition of CH3COOH and CH3COONa gives in water
a. Standard solution
b. buffer solution
c. acidic buffer solution
d. both b & c
Answer- both b & c
Que- Which one of the following is a buffer solution?
a. brine
b. blood
c. glue
d. solution of CuSO4
Answer- blood
Que- Solubility of any salt can be determined from
a. Ka
b. Kb
c. Kc
d. Ksp
Answer- Ksp
Que- The pH of human blood is
a. 7
b. 35
c. 5
d. 8
Answer- 35
Que- By decreasing the pressure the reaction will go to that direction where
a. volume is decreased
b. volume increased
c. heat absorbed
d. no. of moles of specie decreased
Answer- volume increased
Que- Equilibrium state is achieved quickly by the addition of.
a. reactants
b. acid
c. base
d. catalyst
Answer- catalyst
Que- Which one is not state function
a. Internal energy
b. Enthalpy
c. Gibbs free energy
d. Work
Answer- Work
Que- If internal energy of the system is increased
a. Change in state of the system is increased
b. Temperature of the ystem may rise
c. Chemical reaction may take place
d. All
Answer- All
Que- ________________ is study about energy of a chemical system
a. thermochemistry
b. thermodynamics
c. chemical kinetics
d. stoichiometry
Answer- thermochemistry
Que- The environment in which a system is studied is
a. State function
b. phase
c. surrounding
d. state
Answer- surrounding
Que- Unit of heat in SI system is
a. J
b. KCaL
c. Cal
d. GJ
Answer- J
Que- Anything which depends upon initial and final state of a system is
a. environment
b. surrounding
c. state function
d. enthalpy
Answer- state function
Que- Total energy of a system is
a. P.E + K.E
b. P.E + heat energy
c. K.E + heat energy
d. P.E + mechanical energy
Answer- P.E + K.E
Que- Most of thermodynamic parameters are
a. system
b. surrounding
c. phase
d. state functions
Answer- state functions
Que- Two fundamental ways to transfer energy are
a. pressure and temperature
b. pressure and volume
c. heat and work
d. heat and volume
Answer- heat and work
Que- Enthalpy change can be
a. calculated by Hess law
b. can be measured by calorimeter
c. both a and b
d. none
Answer- both a and b
Que- Reaction in which heat evolves is called
a. endothermic
b. spontaneous
c. non-spontaneous
d. exothermic
Answer- exothermic
Que- Pumping of water uphill is
a. spontaneous process
b. non-spontaneous process
c. irreversible process
d. reversible process
Answer- non-spontaneous process
Que- State function the macroscopic property of system depends upon
a. path of reaction
b. initial state
c. final state
d. initial and final state
Answer- initial and final state
Que- Which one of the following is a state function?
a. pressure
b. temperature
c. enthalpy
d. all of the above
Answer- all of the above
Que- When enthalpy of reactants is higher than product then reaction will be
a. endothermic
b. spontaneous
c. non-spontaneous
d. exothermic
Answer- exothermic
Que- Enthalpy of a reaction can be measured by
a. glass calorimeter
b. manometer
c. Barometer
d. thermometer
Answer- glass calorimeter
Que- Enthalpy of combustion for food fuel and other compounds can be measured accurately by
a. glass calorimeter
b. bomb calorimeter
c. thermometer
d. manometer
Answer- bomb calorimeter
Que- Which of the following solutions of H2SO4 is more concentrated?
a. 1 Molar solution
b. 1 molal solution
c. 1 normal solution
d. all have same concentration
Answer- 1 Molar solution
Que- Which of the following unit of concertration is independent of temperature?
a. Molarity
b. Molality
c. Mole fraction
d. all
Answer- Molality
Que- Which of the following is an example of liquid in gas solution.
a. Opals
b. Dust particles in smoke
c. Paints
d. Fog
Answer- Fog
Que- The molal boiling point constant is the ration of the elevation of boiling point to
a. Molarity
b. Molality
c. More fraction of solvent
d. Mole fraction of solute
Answer- Molality
Que- Which of the following are the conditions of colligative properties
a. Non-electrolye solute
b. Non-volatile solute
c. Dilute solution
d. All of the above
Answer- All of the above
Que- Which has the minimum freezing point?
a. One Molal NaCI
b. One molal KCI solution
c. One molal CaCI2
d. One molal urea solution
Answer- One molal CaCI2
Que- Which of the following is not a colligative property?
a. Lowering of vapour pressure
b. Freezing point
c. Osmotic pressure
d. Elevation of polling point
Answer- Freezing point
Que- Which of the following substance do not show continuous solubility curve?
a. KCIO4
b. Na2SO4. 10H2O
c. K2Cr2O7
d. PbCl2
Answer- Na2SO4. 10H2O
Que- When common salt is dissolved in water?
a. Boiling point of water dicrease
b. Boiling point of water increase
c. Boiling point of water remains same
d. None of the above
Answer- Boiling point of water increase
Que- Every sample of matter with uniform properties and fixed composition is called
a. solute
b. solvent
c. solution
d. phase
Answer- phase
Que- Homogeneous mixture of two or more than two compounds is called
a. solution
b. compound
c. radical
d. ion
Answer- solution
Que- The component of solution which is in smaller amount is called
a. solvent
b. solute
c. phase
d. ion
Answer- solute
Que- Solution with maximum concentration of solute at given temperature is called
a. Super saturated solution
b. unsaturated solution
c. saturated solution
d. dilute solution
Answer- saturated solution
Que- 10ml of alcohol dissolve in 90ml of water unit of concentration used is
a. % w/w
b. % w/v
c. % v/v
d. % v/w
Answer- % v/v
Que- Number of moles in 1 kg of solvent is called
a. normality
b. molarity
c. molality
d. mole fraction
Answer- molality
Que- 5g of of NaCl per 1 dm3 of solution of NaCl in water the concentration of solution will be
a. 1 M
b. 1 m
c. 1 M
d. 1 N
Answer- 1 M
Que- In partially miscible liquids the two layers are
a. saturated solutions of each liquid
b. unsaturated solutions of each liquid
c. normal solution of each liquid
d. no layer formation takes place
Answer- saturated solutions of each liquid
Que- If the volume of solution is equal to sum of volumes of its all components then the solution
a. will be an ideal solution
b. will be non-ideal solution
c. will show deviations from Raoults law
d. both b & c
Answer- will be an ideal solution
Que- The relative lowering of vapour pressure is
a. equal to the mole fraction of solvent
b. equal to the mole fraction of solute
c. directly proportional to the mole fraction of solute
d. both b & c
Answer- both b & c
Que- The solution which distils over with change in composition
a. ideal solution
b. zeotropic solution
c. azeotropic solution
d. non-ideal solution
Answer- zeotropic solution
Que- Mixtures which distill over without change in composition called
a. zeotropic mixture
b. azeotropic mixture
c. amphoteric mixture
d. ideal solution
Answer- azeotropic mixture
Que- Concentration of solute molecule when they are in equilibrium with solid substance at particular temperature is called
a. saturated solution
b. solubility
c. unsaturated solution
d. super saturated solution
Answer- solubility
Que- Solubility of KCIO3 gives
a. continuous and falling solubility curve
b. discontinuous and falling solubility curve
c. continuous and rising solubility curve
d. discontinuous and rising solubility curve
Answer- continuous and rising solubility curve
Que- The determination of correct molecular weight from Raoults law is applicable to
a. a volatile solute in dilute solution
b. a non-electrolyte & non volatile solute in concentrated solution
c. a non-electrolyte & non volatile solute in concentrated solute
d. non volatile solute in a dilute solution
Answer- non volatile solute in a dilute solution
Que- Boiling point elevations can be measured by
a. Beckmanns method
b. Landsbergers method
c. Linds method
d. none of the above
Answer- Landsbergers method
Que- Beckmanns apparatus is used to measure
a. boiling point elevation
b. depression in freezing point
c. lowering of vapour pressure
d. lowering of osmotic pressure
Answer- depression in freezing point
Que- The compounds in which water molecules are added are called
a. Hydrated ions
b. double salts
c. hydrates
d. complexes
Answer- hydrates
Que- Hydration is a process in which
a. Molecules are surrounded by solvent molecules
b. Ions are surrounded by solvent molecules
c. Both ions and molecules are surrounded by solvent molecules
d. Both ions and molecules are surrounded by water molecules
Answer- Both ions and molecules are surrounded by water molecules
Que- Solution of Na2SO4 will be
a. basic
b. acidic
c. neutral
d. cannot be presicted without data
Answer- neutral
Que- ppm means
a. parts of solute in 1000 parts of solvent
b. parts of solvent in 1000 parts of solute
c. parts of solute in one million parts of solution
d. parts of solvent in one million parts of solute
Answer- parts of solute in one million parts of solution
Que- 1 molar solution of glucose in water contains weight of glucose
a. 180g/dm3
b. 170g/dm3
c. 190g/dm3
d. 195g/dm3
Answer- 180g/dm3
Que- Water of crystallization can be removed by
a. drying
b. heating
c. evaporation
d. All of the above
Answer- heating
Que- The relative lowering of vapour pressure is directly proportional to molality if the solution is
a. concentrated
b. dilute
c. saturated solution
d. all of the above
Answer- dilute
Que- Which one of the following salt does not hydrolyzed
a. Na2SO4
b. AlCl3
c. CuSO4
d. NH4Cl
Answer- Na2SO4
Que- Which of the following element act as inert electrode
a. Cu
b. Ag
c. Pt
d. None
Answer- Pt