Question : Which of the following is the main compound of voter ink?
Option 1: Silver nitrate
Option 2: Ammonium chloride
Option 3: Silver chloride
Option 4: Ammonium nitrate
Correct Answer: Silver nitrate
Solution : The correct option is Silver nitrate.
Silver nitrate (AgNO3) is the principal ingredient of voter ink, also known as indelible ink or electoral ink. When silver nitrate is applied to the skin, it combines with the salts, and proteins on the skin's surface, leaving a black stain that is difficult to remove. This helps to maintain the voting process's integrity by clearly identifying individuals who have previously voted.
Application | Eligibility | Selection Process | Result | Cutoff | Admit Card | Preparation Tips
Question : Which of the following chemicals are widely used in gunpowder of fireworks?
Option 1: Silver nitrate and charcoal
Option 2: Silver nitrate and sulphur
Option 3: Potassium sulphate and phosphorous
Option 4: Potassium nitrate, sulphur and charcoal
Question : Which one of the following is not a compound?
Option 1: Sodium Chloride
Option 2: Carbon Monoxide
Option 3: Iron
Option 4: Water
Question : Saltpetre is another name for ______.
Option 1: sodium chloride
Option 2: potassium nitrate
Option 3: potassium chloride
Option 4: sodium hydroxide
Question : Which scientist synthesised an organic compound, urea, from an inorganic compound, ammonium cyanate?
Option 1: Friedrich Wöhler
Option 2: Kolbe
Option 3: Berthelot
Option 4: Berzelius
Question : Which of the following metals is the heaviest?
Option 1: Iron
Option 2: Silver
Option 3: Nickel
Option 4: Osmium
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile