Q121. Which is the difference between asteroids and comets? 1. Asteroids are small rocky planetoids, while comets are formed of frozen gases held together by rocky and metallic material. 2. Asteroids are found mostly between the orbits of Jupiter and Mars, while comets are found mostly between Venus and Mercury. 3. Comets show a perceptible glowing tail, while asteroids do not. Which of the statements given above is/are correct?

Consider the following statements regarding asteroids: 1. Asteroids are rocky debris of varying size orbiting the sun 2. Most of the asteroids are small but som

What is the difference between a CFL and an LED lamp? 1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semiconductor material.

The group of small pieces of rock revolving round the Sun between the orbits of Mars and Jupiter are called:

Which of the following pairs is/are correctly matched? | Spacecraft | Purpose | | :--- | :--- | | 1. Cassini-Huygens | Orbiting the Venus and transmitting data

With reference to India’s satellite launch vehicles, consider the following statements: 1. PSLVs launch the satellite useful for Earth resources monitoring wher

Consider the following statements: The Mangalyaan launched by ISRO 1. is also called the Mars Orbiter Mission 2. made India the second country to have a spacecr

Consider the following pairs: | Objects in space | Description | | :--- | :--- | | 1. Cepheids | Giant clouds of dust and gas in space | | 2. Nebulae | Stars w

Consider the following statements : 1. The albedo of an object determines its visual brightness when viewed with reflected light. 2. The albedo of Mercury is mu

Consider the following statements: A person in a spaceship located half way between the earth and the sun will notice that the: (1) The sky is jet black. (2) st

With reference to radioisotope thermoelectric generators (RTGs), consider the following statements: 1. RTGs are miniature fission reactors. 2. RTGs are used for

Consider the following statements: 1. The Earth’s magnetic field has reversed every few hundred thousand years. 2. When the Earth was created more than 4000 mil

The term ‘Goldilocks Zone’ is often seen in the news in the context of

Which of the following is/are cited by the scientists as evidence/evidence for the continued expansion of the universe? 1. Detection of microwaves in

"Membrane Bioreactors" are often discussed in the context of:

Which one of the following is synthesised in the human body that dilates blood vessels and increases blood flow?

Consider the following activities: 1. Identification of narcotics on passengers at airports or in aircraft 2. Monitoring of precipitation 3. Tracking

Which one of the following words/phrases is most appropriately used to denote “an interoperable network of 3D virtual worlds that can be accessed simu

In which of the following are hydrogels used? 1. Controlled drug delivery in patients 2. Mobile air-conditioning systems 3. Preparation of industrial

Consider the following statements: Statement-I: Giant stars live much longer than dwarf stars. Statement-II: Compared to dwarf stars, giant stars have