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  • Question
  • Which of the following reactions are redox reactions?


  • Options
  • A. Ba(s)+Cl2(g)--->BaCl2(s)
  • B. Mg(s)+Br2(l)--->MgBr2(s)
  • C. Al(s)+3Ag^+(aq)--->Al^3+(aq)+3Ag(s)
  • D. All of the above

  • Correct Answer
  • All of the above 

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    Chemistry problems


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    • 1. Which is the best definition of activation energy?

    • Options
    • A. the energy required to break the bonds of reactant molecules
    • B. the energy required to end a chemical reaction
    • C. the energy required to bind a substrate to an active site
    • D. the energy required to re-form bonds in product molecules
    • Discuss
    • 2. The chemical name of common salt is

    • Options
    • A. Calcium Chloride
    • B. Potassium Chloride
    • C. Sodium Chloride
    • D. Magnesium Chloride
    • Discuss
    • 3. Which molecule is nonpolar and has a symmetrical shape?

    • Options
    • A. NH3
    • B. HCl
    • C. H2O
    • D. CH4
    • Discuss
    • 4. What types of atoms form covalent bonds?

    • Options
    • A. metal and metal
    • B. metal and non metal
    • C. non metal and non metal
    • D. All of the above
    • Discuss
    • 5. Atoms of the same element can differ in

    • Options
    • A. Atomic number
    • B. Atomic mass
    • C. electrons
    • D. None of the above
    • Discuss
    • 6. A solution that is hypotonic to a cell has

    • Options
    • A. more water molecules surrounding the cell than inside the cell
    • B. more water molecules inside the cell than outside the cell
    • C. equal water molecules inside and outside the cell
    • D. None of the above
    • Discuss
    • 7. Liquid sodium is being considered as

    • Options
    • A. engine coolant
    • B. bleaching agent
    • C. antiseptic
    • D. None of the above
    • Discuss
    • 8. Conductivity in a metal results from the metal atoms having

    • Options
    • A. highly mobile electrons in the valence shell
    • B. high electronegativity
    • C. high ionization energy
    • D. highly mobile protons in the nucleus
    • Discuss
    • 9. Which of the following is not a strong acid?

    • Options
    • A. H2SO4
    • B. CH3COOH
    • C. HCl
    • D. HBr
    • Discuss
    • 10. Which non metal is liquid at room temperature?

    • Options
    • A. Mercury
    • B. Caesium
    • C. Bromine
    • D. Rubidium
    • Discuss


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