Which one of the following electric lighting devices contains mercury vapour and is toxic in nature?
Compact Flourescent Lamps
Incandescent bulbs produce light by heating a tungsten filament until it glows, and they do not contain mercury.
Compact Fluorescent Lamps work by passing an electric current through a small amount of mercury vapour sealed inside the glass tube, which produces ultraviolet light that a phosphor coating converts into visible light; this mercury vapour is toxic and requires careful disposal.
Light emitting diodes produce light through a semiconductor junction and contain no mercury.
Hence, among the given options, it is the Compact Fluorescent Lamp that is specifically known for containing toxic mercury vapour.
Similar Questions
In an experiment, samples of two colourless solutions X and Y were taken. On adding turmeric solution, X acquired yellow colour and Y became brick red. What can you conclude about the nature of X and Y ?
Read the statements given below and choose the correct option.
Assertion : Salts, edible oils, vinegar, sugar, etc are common preservatives.
Reason : These enhance the flavour of food
Identify incorrect statement about non-metals :
Which of the following substances are basic in nature?
(A) Curd
(B) Vinegar
(C) Lime water
(D) Ant's sting
(E) Milk of magnesia
A coating of which material is commonly deposited on iron to protect it from corrosion and formation of rust?
Important Questions from Chemistry in Everyday Life
Which of the following is a greenhouse gas?
I. Methane
II. Nitrous oxide
Which one of the following is used in soda-acid fire extinguishers?
The separation of two immiscible liquids can be done based on the difference in their_______.
Orange juice contains ______ acid due to which it tastes sour.
Impure water can be made pure
