Electrolysis and Storage of Batteries

111. When two batteries are connected in parallel, it should be ensured that

1. they have same e.m.f.
2. they have same make
3. they have same ampere-hour capacity
4. they have identical internal resistance

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112. Which among the following constitutes the major load for an automobile battery ?

1. Brake light
2. Self starter
3. Parking lights
4. Spark plugs

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113. Which of the following battery is used for air-craft ?

1. Lead-acid battery
2. Nickel-iron battery
3. Dry cell battery
4. Silver oxide battery

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114. Which of the following cell has a. reversible chemical reaction ?

1. Lead-acid
2. Mercury oxide
3. Carbon-zinc
4. Silver-oxide

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115. Which of the following factors adversely affects the capacity of the leadacid battery ?

1. Temperature of surroundings
2. Specific gravity of electrolyte
3. Rate of discharge
4. All of the above

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116. Which of the following has lower sp. gravity V

1. Dilute H2S04
2. Concentrated H2SO4
3. Water
4. Any of the above

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117. Which of the following is incorrect ?

1. A storage cell has a reversible chemical reaction
2. A lead-acid cell can be recharged
3. A carbon-zinc cell has unlimited shelf life
4. A primary cell has an irreversible chemical reaction

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118. Which of the following primary cells has the highest voltage ?

1. Manganese-alkaline
2. Carbon-zinc
3. Lithium
4. Mercury

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119. Which of the following primary cells has the lowest voltage ?

1. Lithium
2. Zinc-chloride
3. Mercury
4. Carbon-zinc

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120. While preparing electrolyte for a lead-acid battery

1. water is poured into acid
2. acid is poured into water
3. anyone of the two can be added to other chemical
4. none

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