31. Standard pressure is:
A. 1 atm
B. 2 atm
C. 5 atm
D. 10 atm
Answer: A
32. Oxidizing agent:
A. Gains electrons
B. Loses electrons
C. Does not react
D. Absorbs heat
Answer: A
33. Reducing agent:
A. Gains electrons
B. Loses electrons
C. Neutral
D. Stable
Answer: B
34. Conductivity depends on:
A. Temperature
B. Concentration
C. Nature of electrolyte
D. All
Answer: D
35. Increasing temperature:
A. Decreases conductivity
B. Increases conductivity
C. No effect
D. Stops current
Answer: B
36. Electroplating is used for:
A. Decoration
B. Protection
C. Both
D. None
Answer: C
37. In electroplating, metal is deposited on:
A. Cathode
B. Anode
C. Electrolyte
D. Salt bridge
Answer: A
38. Fuel cells convert:
A. Heat to electricity
B. Chemical energy to electricity
C. Light to energy
D. Sound to energy
Answer: B
39. Dry cell is an example of:
A. Electrolytic cell
B. Galvanic cell
C. Fuel cell
D. Solar cell
Answer: B
40. Lead-acid battery is used in:
A. Cars
B. Phones
C. TVs
D. Radios
Answer: A