Chemistry

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Q. In a hexagonal close-packed (HCP) structure, how many atoms are present in one unit cell? (2023)
  • A. 2
  • B. 4
  • C. 6
  • D. 8
Q. In a hexagonal close-packed (HCP) structure, what is the coordination number? (2022)
  • A. 4
  • B. 6
  • C. 12
  • D. 8
Q. In a reaction at equilibrium, if the concentration of a reactant is increased, what will happen to the equilibrium position? (2019)
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Depends on temperature
Q. In a reaction at equilibrium, if the concentration of products is increased, what will happen? (2022)
  • A. Equilibrium shifts to the left
  • B. Equilibrium shifts to the right
  • C. No change
  • D. Reaction stops
Q. In a reaction at equilibrium, if the concentration of reactants is increased, what will happen to the position of equilibrium? (2022)
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Depends on temperature
Q. In a reaction at equilibrium, if the concentration of reactants is increased, what will happen? (2022)
  • A. The equilibrium will shift to the right.
  • B. The equilibrium will shift to the left.
  • C. The equilibrium will not change.
  • D. The reaction will stop.
Q. In a reaction at equilibrium, if the temperature is increased and the reaction is exothermic, what will happen? (2021)
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Increase in Kc
Q. In a reaction at equilibrium, if the temperature is increased for an exothermic reaction, what will happen? (2022)
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Increase in pressure
Q. In a reaction mechanism, what is the term for the slowest step that determines the overall rate of the reaction? (2019)
  • A. Intermediate
  • B. Rate-determining step
  • C. Catalyst
  • D. Transition state
Q. In a reaction, if the concentration of reactants is doubled, what happens to the rate of reaction if the reaction is first order? (2023)
  • A. Doubles
  • B. Triples
  • C. Quadruples
  • D. Remains the same
Q. In a reaction, if the concentration of reactants is doubled, what happens to the rate of reaction if it is first order? (2023)
  • A. Doubles
  • B. Triples
  • C. Quadruples
  • D. Remains the same
Q. In a redox reaction, if the oxidation number of an element increases, what happens to that element? (2020)
  • A. It is oxidized
  • B. It is reduced
  • C. It remains unchanged
  • D. It forms a compound
Q. In a redox reaction, if the oxidation state of an element decreases, what happens to that element? (2021)
  • A. It is oxidized
  • B. It is reduced
  • C. It remains unchanged
  • D. It is ionized
Q. In a redox reaction, if the oxidation state of an element decreases, what has occurred? (2021)
  • A. Oxidation
  • B. Reduction
  • C. Neutralization
  • D. Decomposition
Q. In a redox reaction, if the oxidation state of an element decreases, what is happening to that element? (2021)
  • A. It is being oxidized
  • B. It is being reduced
  • C. It is unchanged
  • D. It is ionized
Q. In a redox reaction, if the oxidation state of an element decreases, what is it undergoing? (2021)
  • A. Oxidation
  • B. Reduction
  • C. Neutralization
  • D. Decomposition
Q. In a redox reaction, if the oxidation state of an element increases, what happens to that element? (2021)
  • A. It is oxidized
  • B. It is reduced
  • C. It remains unchanged
  • D. It forms a compound
Q. In a redox reaction, the substance that gains electrons is called: (2021)
  • A. Oxidizing agent
  • B. Reducing agent
  • C. Reducing agent
  • D. None of the above
Q. In a redox reaction, what happens to the oxidation state of the reducing agent? (2021)
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Varies
Q. In a redox reaction, which of the following statements is true? (2020)
  • A. Oxidation involves gain of electrons
  • B. Reduction involves loss of electrons
  • C. Oxidation state of an element decreases during oxidation
  • D. Reduction involves gain of electrons
Q. In a reversible process, the work done is: (2023)
  • A. Always maximum
  • B. Always minimum
  • C. Equal to the heat absorbed
  • D. Independent of the path
Q. In a reversible reaction at equilibrium, if the concentration of reactants is increased, what will happen to the equilibrium position? (2023)
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Depends on temperature
Q. In a reversible reaction at equilibrium, what happens if the temperature is increased? (2019)
  • A. The reaction shifts to the exothermic side
  • B. The reaction shifts to the endothermic side
  • C. No change occurs
  • D. The reaction rate decreases
Q. In a reversible reaction, if the forward reaction is exothermic, what can be said about the reverse reaction? (2022)
  • A. It is also exothermic
  • B. It is endothermic
  • C. It has no effect on equilibrium
  • D. It is spontaneous
Q. In a simple cubic lattice, how many atoms are effectively present in one unit cell? (2019)
  • A. 1
  • B. 2
  • C. 4
  • D. 8
Q. In a simple cubic lattice, how many atoms are present in one unit cell? (2019)
  • A. 1
  • B. 2
  • C. 4
  • D. 8
Q. In an electrochemical cell, the anode is where: (2019)
  • A. Oxidation occurs
  • B. Reduction occurs
  • C. Electrons are gained
  • D. Ions are produced
Q. In electrolysis, the process of oxidation occurs at which electrode? (2019)
  • A. Anode
  • B. Cathode
  • C. Both electrodes
  • D. None of the above
Q. In the context of adsorption, what does the term 'selectivity' refer to? (2022)
  • A. The ability to adsorb multiple gases
  • B. The preference for one gas over another
  • C. The rate of adsorption
  • D. The temperature dependence of adsorption
Q. In the context of surface chemistry, what does the term 'adsorption' refer to? (2022)
  • A. The process of a substance being taken up by a liquid
  • B. The process of a substance adhering to a surface
  • C. The process of a substance dissolving in a solvent
  • D. The process of a substance being absorbed into a solid
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