Current Questions

Science & Technology :

Uranium Enrichment

Recently, Iran resumed uranium enrichment at its underground Fordow plant located near Tehran.Consider the following given statements about the uranium enrichment process:

  1. Uranium needs to be in a solid form for enrichment due to the varying chemical and physical properties the different isotopes (U-235 and U-238).
  2. Enriched uranium is produced by feeding uranium hexafluoride gas into centrifuges to separate out the most suitable isotope for nuclear fission, called U-235.

Choose the correct answer from the codes given below:


Gravitational Lensing

Recently, researchers plan to investigate how new stars are born using NASA’s James Webb Space Telescope. For this, they will take the help of a natural phenomenon called Gravitational Lensing. Consider the following statements regarding the gravitational lensing:

  1. The phenomenon occurs when a huge amount of matter, such as a massive galaxy or cluster of galaxies, creates a gravitational field that distorts and magnifies the light from objects behind it, but in the same line of sight.
  2. The investigation is a part of the programme called Targeting Extremely Magnified Panchromatic Lensed Arcs and Their Extended Star Formation (TEMPLATES).

Choose the correct answer from the codes given below:


Cryptocurrency

Consider the following statements with respect to Cryptocurrency:

  1. It is a form of digital cash that uses encryption technology to make it secure.
  2. People can store their cryptocurrency stashes in virtual wallets.
  3. Cryptocurrency is powered by a technology called blockchain, which functions like an open ledger that gets updated in real time.
  4. Cryptocurrency is secure and non-anonymous.

Select the correct answer using the code given below:


Global Clusters

Which of the following can best describe global clusters?


Solar Tsunami

Consider the following statements with respect to Solar Tsunami:

  1. The Sun’s magnetic field, from which sunspots gets generated, wraps around the sun in the east-west direction.
  2. At the end of a solar cycle, magnetic dam can break, releasing huge amounts of plasma cascading like a tsunami towards the equator.
  3. The tsunami waves travel at high speeds of about 1,000 km per hour carrying excess plasma to the upper-latitudes.

Select the correct answer using the codes given below:


Dark Matter

Which of the following statements are correct with respect to Dark Matter?

  1. Dark Matter emits no light and cannot be seen directly
  2. Dark Matters are stars or planets.
  3. Astronomers do not detect gamma rays produced by them.
  4. Dark matter is black hole.

Select the correct answer using the codes given below:


Agent Orange

Consider the following statements vis-à-vis ‘Agent Orange’:

  1. It is a herbicide that kills the invasive shrubs which compete with the growth of orange tree.
  2. The active ingredient of Agent Orange is a combination of 2,4-dichlorophenoxyacetic acid and 2,4,5-Trichlorophenoxyacetic acid.

Choose the correct answer from the code given below:


Bacteria

Consider the following statement:

  1. Bacteria having NDM1 Genes are usually Superbugs.
  2. Antibiotics taken in unreasonable or partial dose is the cause of antimicrobial resistance.

Choose the correct answer from the code given below:


Solar Cells

Consider the following statements about Solar Cells:

  1. Maximum theoretical efficiency of solar cells is around 98%.
  2. Perovskite layer solar cells have efficiency close to 75%.
  3. Inkjet printing procedure of perovskite solar cells have lowered the production cost.

Choose the correct answer from the code given below:


Showing 1-10 of 17 items.