Thermochemistry MCQ question and answer with solution | Chemistry Gk MCQs

Entropy change of a system and its surroundings in equilibrium

Corrosion is basically an

The internal resistance of a dry cell is

Anode mud is a

Assertion (A) Copper metal with HCl liberates hydrogen.
Reason (R) Hydrogen is present above Cu in the reactivity series.

In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to

Which of the following is a characteristic of an exothermic reaction?

During isothermal expansion of an ideal gas, its

The passage of an electric current through a conducting liquid causes . . . . . . . .

With reference to 'fuel cells' in which hydrogen rich fuel and oxygen are used to generate electricity. Consider the following statements.
1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by products.
2. Fuel cells can be used for powering buildings and not for small devices like laptop, computers.
3. Fuel cells produce electricity in the form of Alternating Current (AC).
Which of the statements given above is/are correct?