Exothermic Reactions Quiz with Answers PDF Download – Test 157

MCQ 781: In ionic crystals, heat energy is taken in to:

1. forming carbonates
2. forming Sulphates
3. breaking crystal lattices
4. forming covalent bonds

MCQ 782: Polarization refers to the:

1. prevention of electricity flowing in the electrolyte solution
2. rapid dissolving of magnesium in dilute acid
3. slow dissolving of magnesium in conc. Acid
4. electricity flowing in the electrolyte solution

MCQ 783: The only covalent molecule conducting electricity is:

1. helium
2. selenium
3. mercury
4. graphite

MCQ 784: Ionic compounds are:

1. soluble in water only
2. good conductors of electricity if in molten state only
3. bad conductors of electricity
4. soluble in water and good conductors of electricity if in molten state

MCQ 785: In Universal indicators, a pH of 11 to 14 is indicated through:

1. turquoise color
2. violet color
3. blue color
4. light violet color