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Subject: Science and Technology

  • Consider the following statements

    Consider the following statements :
    1. Other than those made by humans, nanoparticles do not exist in nature.
    2. Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics.
    3. Nanoparticles of some commercial products which enter the environment are unsafe for humans.
    Which of the statements given above is/are correct ?

  • Consider the following statements

    Consider the following statements :
    DNA Barcoding can be a tool to :
    1. assess the age of a plant or animal.
    2. distinguish among species that look alike.
    3. identify undesirable animal or plant materials in processed foods.
    Which of the statements given above is/are correct ?

  • Consider the following statements

    Consider the following statements :
    1. Biofilms can form on medical implants within human tissues.
    2. Biofilms can form on food and food processing surfaces.
    3. Biofilms can exhibit antibiotic resistance.
    Which of the statements given above are correct?

  • Consider the following statements

    Consider the following statements:
    1. Ballistic missiles are jet-propelled at subsonic speeds throughout their fights, while cruise missiles are rocket-powered only in the initial phase of flight.
    2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.
    Which of the statements given above is/are correct?

  • Consider the following statements

    Consider the following statements:
    1. Carbon fibres are used in the manufacture of the components used in automobiles and aircrafts.
    2. Carbon fibres once used cannot be recycled.
    Which of the statements given above is/are correct?

  • Consider the following pairs

    Consider the following pairs:
    Objects in space Description
    1. Cepheids : Giant clouds of dust and gas in sapce
    2. Nebulae : Stars which brighten and dim periodically
    3. Pulsars : Neutron stars that are formed when massive stars run out of fuel and collapse
    How many of the above pairs are correctly matched?

  • Consider the following activities

    Consider the following activities:
    1. Identification of narcotics on passengers at airports or in aircraft
    2. Monitoring of precipitation
    3. Tracking the migration of animals
    In how many of the above activities can the radars be used?

  • Consider the following

    Consider the following:
    1. Battery storage
    2. Biomass generators
    3. Fuel cells
    4. Rooftop solar photovoltaic units
    How many of the above are considered “Distributed Energy Resources”?

  • Consider the following statements

    Consider the following statements:

    Statement-I: Giant stars live much longer than dwarf stars.

    Statement-II: Compared to dwarf stars, giant stars have a greater rate of nuclear reactions.

    Which one of the following is correct in respect of the above statements?

  • Consider the following statements

    Consider the following statements:

    I. Indian Railways have prepared a National Rail Plan (NRP) to create a future ready railway system by 2028.
    II. ‘Kavach’ is an Automatic Train Protection system developed in collaboration with Germany.
    III. ‘Kavach’ system consists of RFID tags fitted on track in station section.

    Which of the statements given above are not correct?