Question : The wire of flashbulbs is made up of
Option 1: Magnesium
Option 2: Barium
Option 3: Copper
Option 4: Silver
Correct Answer: Magnesium
Solution : The correct option is Magnesium.
The wire in flash bulbs is made of magnesium (Mg). When an electric current passes through the magnesium wire, it rapidly oxidizes, producing an intense burst of light. This combustion reaction is highly exothermic and provides the brief and intense illumination needed for flash photography.
Application | Eligibility | Selection Process | Result | Cutoff | Admit Card | Preparation Tips
Question : Corundum is an ore of:
Option 1: aluminium
Option 2: silver
Option 3: copper
Option 4: iron
Question : The hardness of the water is commonly measured in terms of:
Option 1: calcium carbonate equivalents
Option 2: calcium sulphate equivalents
Option 3: magnesium carbonate equivalents
Option 4: magnesium sulphate equivalents
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
Question : Which of the following is the formula of barium peroxide?
Option 1: Ba2O2
Option 2: BaSO4
Option 3: BaO
Option 4: BaO2
Question : Which of the following elements is a member of the actinoid series?
Option 2: Lanthanum
Option 3: Lutetium
Option 4: Thorium
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile