Prelims 2021 • Paper 1 (GS) • Q.72

Prelims • Paper 1 (GS) • 2021 • Q.72

General Science

With reference to street-lighting, how do sodium lamps differ from LED lamps?

Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.

As street-lights, sodium lamps have longer life span than LED lamps.

The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street-lighting.

2021 Prelims • Paper 1 (GS)

Q.71 Q.73

Syllabus Connection

General Science. (Prelims)

NCERT Connection

Ch.11: The Human Eye and the Colourful World

Science • Class 10 • Science Class 10

Related PYQs in General Science

2026•Prelims•Paper 1 (GS)

Which of the following statements with regard to genetic medicine is/are correct? 1. Genetic medicines correct/compensate for the faulty genes responsible for disease. 2. Engineered viruses and lipid nanoparticles are used as carriers of the genetic medicine. 3. Genetic medicines alter the entire DNA sequence.

2025•EPFO APFC•General Ability Test

Which one among the following determines the Hardness Index of fresh water ?

2025•EPFO APFC•General Ability Test

Which one among the following is the primary environmental concern associated with permafrost thawing in the Arctic ?

2025•EPFO APFC•General Ability Test

Which one among the following is the primary commercial use of Amines ?

2025•EPFO APFC•General Ability Test

Which one among the following is known as Carbolic acid ?