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Science and Technology Basics Flashcards

6 cards from real RRB NTPC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Science and Technology Basics flashcards as text

  1. Which gas is released during the process of photosynthesis?

    Answer: Oxygen

    Oxygen (O₂) is released as a by-product of photosynthesis when water molecules are split in the light-dependent reactions.

  2. The phenomenon responsible for the blue color of the sky is:

    Answer: Scattering (Rayleigh Scattering)

    The sky appears blue due to Rayleigh Scattering — shorter (blue) wavelengths of sunlight are scattered more by gas molecules in the atmosphere than longer wavelengths.

  3. The ozone layer is located in which layer of Earth's atmosphere?

    Answer: Stratosphere

    The ozone layer (ozonosphere) is located in the stratosphere, approximately 15-35 km above Earth's surface, and protects Earth from harmful UV radiation.

  4. Which type of radiation has the highest penetrating power?

    Answer: Gamma radiation

    Gamma (γ) radiation has the highest penetrating power among nuclear radiation types. It can penetrate several centimeters of lead or meters of concrete.

  5. The hardest naturally occurring substance is:

    Answer: Diamond

    Diamond is the hardest naturally occurring substance, rating 10 on the Mohs hardness scale. It is a form of pure carbon with atoms arranged in a tetrahedral crystal structure.

  6. ISRO's first successful satellite launch vehicle was:

    Answer: SLV-3

    SLV-3 (Satellite Launch Vehicle) was ISRO's first successful satellite launch vehicle, successfully placing Rohini satellite RS-1 into orbit on July 18, 1980.

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  1. pib.gov.in — Eligibility, registration deadline · verified Oct 2026
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