A) double sulphate of nickel and ammonium B) double cyanide of potassium and silver solution C) cupronickel sulphate D) any of the above. Ans : (A)
A) double cyanide of silver and potassium solution B) potassium nitrate solution C) dilute sulphuric acid D) any of the above. Ans : (A)
A) 0.5 to 1 A/dm2 B) 2 to 4 A/dm2 C) 5 to 10 A/dm2 D) 10 to 20 A/dm2. Ans : (B)
A) 80 mm B) 0.8 mm C) 80 microns D) 0.8 microns. Ans : (D)
A) Zinc plating B) Cadmium plating C) Silver plating. Ans : (A)
A) 25 amperes/dm2 B) 10 to 15 amperes/dm2 C) 5 to 10 amperes/dm2 D) 1 to 3 amperes/dm2. Ans : (D)
A) EMF decreases B) EMF increases C) Current capacity increases D) Current-capacity decreases. Ans : (C)
A) charge the battery at frequent intervals B) keep the electrolyte level low C) drill holes on the terminal top D) apply petroleum jelly. Ans : (D)
A) the electrolyte evaporates B) sediments collect at the bottom of the battery C) too much water is added D) the battery is charged too slowly. Ans : (B)
A) the lesser the terminal voltage B) the lesser the emf C) the greater the emf D) the greater the terminal voltage. Ans : (A)