Que- If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs?
a. H2 is deposited at cathode
b. Colour of the solution becomes fade
c. Cu is deposited at anode
d. All are possible
Answer- Colour of the solution becomes fade
Que- Stronger the oxidizing agent greater is the
a. Oxidation potential
b. Reduction potential
c. Redox potential
d. emf of cell
Answer- Reduction potential
Que- Which has maximum oxidation number?
a. N
b. Cr
c. S
d. Mn
Answer- Mn
Que- Which of the following cell is not rechargeable?
a. Lead storage battery
b. Silver oxide cell
c. Fuel cell
d. Ni-Cd cell
Answer- Silver oxide cell
Que- In an electrolytic cell current flows ?
a. From cathode to anode in outer circuit
b. From anode to cathode outside the cell
c. From cathode to anode inside the cell
d. both b & c
Answer- From anode to cathode outside the cell
Que- Which of the following is true in the case of Zn-Cu cell?
a. The flow of electrons takes place from copper to zinc
b. E0red of copper electrode is less than that of zinc electrode
c. Zinc acts as an anode and copper as cathode
d. All are correct
Answer- Zinc acts as an anode and copper as cathode
Que- In a galvanic cell
a. Chemical energy is converted into electricity
b. Chemical energy is converted into heat
c. Electrical energy is converted into chemical energy
d. Electrical energy is converted into heat
Answer- Chemical energy is converted into electricity
Que- The degree of dissociation of week electrolyte increases as
a. Pressure increases
b. Dilution decreases
c. Dilution increases
d. None
Answer- Dilution increases
Que- Molten NaCl conducts electricity due to the presence of
a. Free electrons
b. Free molecules
c. Free ions
d. Atoms of Na and Cl
Answer- Free ions
Que- Electricity in voltaic cell is produced due to
a. neutralization
b. oxidation
c. reduction
d. both b & c
Answer- both b & c
Que- In electrolytic solution conductance of electricity is due to
a. free electrons
b. ions
c. metals
d. electrodes
Answer- ions
Que- In electrolytic cell electricity carries
a. spontaneous reaction
b. non-wpontaneous reaction
c. neutralization
d. all of above
Answer- non-wpontaneous reaction
Que- Reaction at anode is called
a. oxidation
b. reduction
c. redox
d. decomposition
Answer- oxidation
Que- In Galvanic cell electrons flow from anode to cathode through
a. external electric circuit
b. salt bridge
c. movement of ions
d. all of the above
Answer- external electric circuit
Que- Decrease in oxidation number is called
a. oxidation
b. reduction
c. oxidation-reduction
d. all of above represent same entity
Answer- reduction
Que- For the measurement of standard electrode potential Zn is dipped in
a. 1 M ZnO solution
b. 1 M ZnSO4 solution
c. 5 M ZnSO4 solution
d. 1 M ZnSO4 solution
Answer- 1 M ZnSO4 solution
Que- Right half cell contains __________ electrode
a. A1
b. Zn
c. Cu
d. Fe
Answer- Cu
Que- Salt bridge transfers
a. electrons
b. anion
c. current
d. ions
Answer- ions
Que- Voltaic cell can be recharged by
a. by addition of fresh solution
b. by replacing external circuit with external source of electricity
c. by removal of solution
d. by heating it
Answer- by replacing external circuit with external source of electricity
Que- E0red of an element cab be calculated by comparing it with
a. New electrode of same element
b. SHE
c. 1M solution of ions of respective element
d. 2M solution of HCI
Answer- SHE
Que- Temperature for the measurement of standard electrode potential is
a. 298K
b. 300K
c. 30Degree Centigrade
d. 310K
Answer- 298K
Que- H2 gas in SHE is filled at pressure of
a. 760mm of Hg
b. 750mm of Hg
c. 780mm of Hg
d. 800mm of Hg
Answer- 760mm of Hg
Que- Potential of SHE is considered as
a. zero
b. unity
c. constant
d. multiple of 1
Answer- zero
Que- Chemical used in salt bridge is
a. KOH
b. KCI
c. KNO3
d. KBr
Answer- KCI
Que- Electrode potential of Zn is
a. oxidation
b. reduction
c. oxidation-reduction
d. depends on the nature of the coupled electrode
Answer- depends on the nature of the coupled electrode
Que- List of elements based on hydrogen scale is called
a. periodic table
b. groups
c. periods
d. electrochemical series
Answer- electrochemical series
Que- The element that act as anode always have _______ position in electrochemical cell
a. higher
b. lower
c. in middle
d. no effect of position
Answer- higher
Que- In galvanic cell Zn acts as an anode so its value of standard reduction potential in comparison to coupled electrode would be
a. greater
b. lesser
c. sum of reduction and oxidation potentials
d. none
Answer- greater
Que- Greater value of standard reduction potential greater will be tendency
a. to get oxidized
b. to get reduced
c. to accept electrons
d. both b and c
Answer- both b and c
Que- Greater value of standard reduction potential smaller will be tendency
a. to form positive ions
b. to form negative ions
c. gain electrons
d. all are possible
Answer- to form positive ions
Que- Secondary cell is
a. rechargeable
b. non rechargeable
c. electrolytic cell
d. Daniel cell
Answer- rechargeable
Que- Lead accumulators are
a. secondary cell
b. primary cell
c. voltaic cell
d. both a & c
Answer- both a & c
Que- Density of H2SO4 in lead accumulator is
a. 25g/cm3
b. 3g/cm3
c. 20g/cm3
d. 15g/cm3
Answer- 25g/cm3
Que- Capacity of one lead accumulator cell is
a. 5 volts
b. 2 volts
c. 3 volts
d. 1 volts
Answer- 2 volts
Que- In alkaline battery the anode is made up of
a. MnO2
b. Zn
c. AgO2
d. cadmium
Answer- Zn
Que- The strength of solution of an element whose electrode potential is to be measured is
a. 2M
b. 1N
c. 1m
d. 1M
Answer- 1M
Que- Apparent charge on atom in molecule is
a. valency
b. coordination number
c. oxidation number
d. charge number
Answer- oxidation number
Que- Voltaic cell is a
a. irreversible cell
b. reversible cell
c. alkaline cell
d. all of the above
Answer- all of the above
Que- In K2Cr2O7 the oxidation number of chromium is
a. 7
b. 6
c. -7
d. -6
Answer- 6
Que- Percentage of sulphuric acid in lead accumulator is
a. 40%
b. 25%
c. 30%
d. 50%
Answer- 30%
Que- The reduction potential Zn is
a. 76
b. -0.76
c. -0.55
d. 55
Answer- -0.76
Que- The half cells are interconnected through
a. wire
b. salt bridge
c. electric circuit
d. no connection exists
Answer- salt bridge
Que- The rate of reaction
a. Increases as the reaction proceeds
b. Decreases as the reaction proceeds
c. Remains the same as the reaction proceeds
d. May decrease or increase as the reaction proceeds
Answer- Decreases as the reaction proceeds
Que- The addition of a catalyst to the reaction system
a. Increases the rate of forward reaction only
b. Increases the rate of reverse reaction
c. Increases the rate of forward but decreases the rate of backward reaction
d. Increases the rate of forward as well as backward reaction equally
Answer- Increases the rate of forward as well as backward reaction equally
Que- The specific rate constant of a first order reaction depends on the
a. Time
b. Concentration of the reactant
c. Temperature
d. Concentration of the product
Answer- Temperature
Que- On increasing the temperature the rate of reaction increases mainly because
a. The activation energy of the reaction increases
b. Concentration of the reacting molecules increases
c. Collision frequency increases
d. None of these
Answer- Collision frequency increases
Que- The value of activation energy is primarily determined by
a. Temperature
b. Effective collision
c. Concentration of reactants
d. Chemical nature of reactants and products
Answer- Effective collision
Que- Sum of exponents of molar concentration is called
a. Order of reaction
b. Molecularity
c. Rate of reaction
d. Average of reaction
Answer- Order of reaction
Que- Spontaneous reactions are
a. Moderate
b. Slow
c. Fast
d. not natural
Answer- Fast
Que- In rate expression the concentration of reactants is negative. It shows
a. Concentration of reactant does not change
b. Concentration of product increases
c. Concentration of reactant decreases
d. Concentration of reactant increases
Answer- Concentration of reactant decreases
Que- Unit of rate of reaction is
a. Moles dm-3 sec-1
b. Moles dm-3
c. Moles sec-1
d. Mol-1 dm3 sec-1
Answer- Moles dm-3 sec-1
Que- When a graph is plotted between 1/T on X-axis and log k on y-axis a straight line is obtained with a negative slope which has two end in
a. I and II quadrant
b. II and III quadrant
c. III and IV quadrant
d. II and IV quadrant
Answer- II and IV quadrant
Que- Rate of disappearance of reactant is equal to
a. Rate of reaction
b. Rate of formation of product
c. Energy released during reaction
d. a and b
Answer- Rate of reaction
Que- Rate of reaction when concentration of reactants are taken as unity is called
a. Arrhenius constant
b. Molecularity
c. Specific rate constant
d. Ideal rate constant
Answer- Specific rate constant
Que- For 3rd order reaction the hhalf life is inversely proportional to initial concentration of reactants
a. Single
b. Square
c. Cube
d. Raise to power four
Answer- Square
Que- Which order of reaction obeys the relation t1/2 = 1/Ka
a. First order
b. Second order
c. Third order
d. Zero order
Answer- Second order
Que- Radiations are absorbed in
a. Spectrophotometer method
b. Dilatometric method
c. Optical relation method
d. Refractometric method
Answer- Spectrophotometer method
Que- Activated complex is formed due to
a. Pressure
b. Effective collision
c. Ineffective collisions
d. Temperature
Answer- Effective collision
Que- Energy of reactant higher than energy of product favours
a. Endothermic
b. Exothermic
c. Moderate reaction
d. No reaction
Answer- Exothermic
Que- Energy required to form transition state is called
a. Ea
b. P.E
c. V
d. K.E
Answer- Ea
Que- Which of the following will have very high rate of reaction?
a. Double decomposition reaction
b. Neutralization reaction
c. Ionic reactions
d. all of above
Answer- all of above
Que- Greater the conc. Of reactant
a. Greater will be dx/dt
b. Lesser will be dx/dt
c. dx/dt will be moderate
d. any of above
Answer- Greater will be dx/dt
Que- Anything which increases rate of reaction without being involved in the reaction
a. Promoter
b. Catalyst
c. Inhibitor
d. All of the above
Answer- Catalyst
Que- The substances that reduces the effectiveness of a catalyst are called
a. Promoters
b. Poisoning catalysts
c. Inhibitors
d. pro-catalysts
Answer- Poisoning catalysts
Que- When catalysts and reactants are in more than one phase it is
a. Homogeneous catalysis
b. Heterogeneous catalysis
c. Catalysis
d. Ea
Answer- Heterogeneous catalysis
Que- Each catalyst has
a. Specificity
b. Special structure
c. Its own Ea
d. all of above
Answer- all of above
Que- Biocatalytical proteins are
a. Enzymes
b. Substrate
c. Lipids
d. any of above
Answer- Enzymes
Que- A catalyst can not effect
a. Products
b. Chemical equilibrium
c. Reactants
d. both a & b
Answer- both a & b
Que- An enzyme has its specificity due to
a. Substrate
b. Structure
c. Temperature
d. Pressure
Answer- Structure
Que- Co-enzymes are
a. Non proteineous
b. Proteineous
c. sugars
d. lipids
Answer- Non proteineous
Que- A substance which increases the reactivity of enzyme is called
a. Promoters
b. Inhibitors
c. Stimulators
d. Non-activators
Answer- Promoters
Que- End name of enzyme is
a. yl
b. ase
c. one
d. al
Answer- ase
Que- When the reaction completes in more than one steps rate of reaction will be determined by
a. Fast step
b. Slowest step
c. All steps
d. Molecularity of the reaction
Answer- Slowest step
Que- For determining the order of reaction we use
a. Refractometric method
b. Dilatometric method
c. Optical activity method
d. Half life method
Answer- Half life method
Que- Energy of activation for backward reaction is less than forward reaction for ________ reaction
a. Endothermic
b. Exothermic
c. Moderate
d. Fast
Answer- Endothermic
Que- Which statement is incorrect about catalyst
a. it is used in smaller amount
b. decrease activation energy
c. specific in action
d. it affects specific rate constant
Answer- it affects specific rate constant
Que- Elements in the same vertical group of the periodic table have same
a. Number of valence electrons
b. Atomic number
c. Atomic mass
d. Atomic volume
Answer- Number of valence electrons
Que- An element having low value of ionization energy and low value of electron affinity is likely to belong to
a. Group IA
b. Group IB
c. Group VIIA
d. Group VIII
Answer- Group IA
Que- Which set of elements is listed in order of increasing ionization energy?
a. Sb < As < S < P < Cl
b. Cl < Sb < P < As < S
c. As < Cl < P < S < Sb
d. Sb < As < Cl < S < P
Answer- Sb < As < S < P < Cl
Que- Which of the following always increases on going from top to bottom in a group?
a. Metallic character
b. Electronegativity
c. Oxidizing power
d. Tendency to get reduced
Answer- Metallic character
Que- Which of the p-block elements are not representative elements?
a. Alkali metals (I-A)
b. Group-14 elements (IV-A)
c. Group-18 elements (VIII-A)
d. Halogens (VII-A)
Answer- Group-18 elements (VIII-A)
Que- Among halogens the highest boiling point is of
a. Flrorine
b. Chlorine
c. Bromine
d. Iodine
Answer- Iodine
Que- Which of the following will not form crystalline structure with opporitely charged ions
a. H+
b. H-
c. Mg2+
d. Ca2+
Answer- H+
Que- Which statement is incorrect?
a. All the metals are good conductor of electricity.
b. All the metals are good conductor of heat
c. All the metals form positive ions
d. All the metals form acidic oxides
Answer- All the metals form acidic oxides
Que- Periodic table provides a basic framework to study elements with respect to their
a. Physical properties
b. Chemical properties
c. Properties of their compounds
d. All
Answer- All
Que- The scientist who did not contribute in the construction of periodic table?
a. Al-Razi
b. Moseley
c. Dobereiner
d. Democritus
Answer- Democritus
Que- Concept of Triads was introduced by
a. Dobereiner
b. Newland
c. Mendeleev
d. Al-Razi
Answer- Dobereiner
Que- Which element was not known when Mendeleev proposed his classification?
a. Hydrogen
b. Sodium
c. Copper
d. Germanium
Answer- Germanium
Que- Elements with similar chemical properties appear in the
a. Same family
b. Same period
c. p block elements
d. Right upper corner
Answer- Same family
Que- Noble gases are named so because they are
a. less reactive
b. Zero group elements
c. Having completely filled valence shell
d. All
Answer- All
Que- In modern periodic table all the leements are arranged in ascending order of
a. Valency
b. Atomic mass
c. Atomic number
d. Valence electrons
Answer- Atomic number
Que- The longest period in the modern periodic table is
a. 6th
b. 7th
c. 2nd and 3rd both
d. 5th
Answer- 6th
Que- Inner transition elements are called
a. Lanthanides
b. Actinides
c. Rare earth metals
d. All
Answer- All
Que- Seventh period contains ______________ normal elements
a. 2
b. 4
c. 6
d. 8
Answer- 2
Que- Modern periodic table has been divided in _______ blocks
a. 2
b. 4
c. 8
d. 7
Answer- 4
Que- Non-metals usually form ______________ oxides
a. Acidic
b. Amphoteric
c. Neutral
d. All of the above
Answer- Acidic
Que- Amphoteric exides are those which possess ________ properties
a. Acidic
b. Basic
c. Acidic and basic
d. Neutral and acidic
Answer- Acidic and basic
Que- Best position of hydrogen in the periodic table is above I.A Group which is mainly due to
a. Both are electropositive
b. Similar outer most shell electronic configuration
c. Both form ionic compounds
d. All
Answer- All
Que- Hydrogen resembles with carbon because of having
a. Same number of electrons in the valence shell
b. Similar physical state
c. Remarkable reducing properties
d. Homovalent (show same valency)
Answer- Remarkable reducing properties
Que- Which one of the following sets consists of all coinage metals?
a. Cu Hg Au
b. Cu Ag Au
c. Ag Au Hg
d. Cu Fe Au
Answer- Cu Ag Au