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NON-MEATALS, C . Sulphur, Nitrogen, halogen, inert Gases

📆 October 22, 2024

Total Questions: 38

31. Which one of the following elements exists in the liquid state at room temperature? [U.P. P.C.S. (Mains) 2017]

Correct Answer: (c) Bromine
Solution:Bromine is an element with symbol Br and atomic number 35. It is the third lightest halogen and the only non-metallic element that exists in a liquid state at room temperature.

32. The halogen being used as an analgesic is — [R.A.S./R.T.S. (Pre) 2012]

Correct Answer: (b) Bromine
Solution:Analgesic drugs act in various ways on the peripheral and central nervous system. Compounds of bromine are used as analgesics.

33. Which one of the following non-metals is not a poor conductor of electricity? [I.A.S. (Pre) 2007]

Correct Answer: (b) Selenium
Solution:Selenium is a non-metallic photoconductive substance that demonstrates photovoltaic action. Its electrical conductivity changes when it absorbs electromagnetic radiation or light. It exists in several allotropes that interconvert upon heating and cooling.

34. The most commonly used substance in fluorescent tubes is — [U.P.P.C.S. (Pre) 2006]

Correct Answer: (c) Mercury Vapor and Argon
Solution:Fluorescent lamps are generally filled with low-pressure mercury vapor and argon. Gases like xenon, neon, or krypton may also be used. The pressure inside the lamp is around 0.3% of atmospheric pressure.

35. Which gas is filled in normal tubelights? [M.P. P.C.S. (Pre) 1993]

Correct Answer: (e) Mercury vapor with argon & Mercury vapor with neon
Solution:Normal tube lights are filled with mercury vapor along with inert gases like argon or neon. An electric current excites the mercury vapor, producing ultraviolet light that causes the phosphor coating inside the bulb to glow.

36. Which gas is filled at low pressure in a tubelight? [Uttarakhand P.C.S. (Pre) 2005]

Correct Answer: (b) Neon and Mercury vapor
Solution:Normal tube lights are filled with mercury vapor along with inert gases like argon or neon. An electric current excites the mercury vapor, producing ultraviolet light that causes the phosphor coating inside the bulb to glow.

37. Tubelight is filled with — [U.P. Lower Sub. (Pre) 2009]

Correct Answer: (e) Argon gas at low pressure & Mercury vapour at low pressure
Solution:Normal tube lights are filled with mercury vapor along with inert gases like argon or neon. An electric current excites the mercury vapor, producing ultraviolet light that causes the phosphor coating inside the bulb to glow.

38. The gas used in discharge tubes for optical decoration and advertising is — [U.P.P.C.S. (Pre) 2001]

Correct Answer: (d) Neon
Solution:

The neon gas is used in discharge lamps, tubes, and fluorescent bulbs.

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