Which one of the following is a reason why astronomical distances are measured in light-years?
A. Distances among stellar bodies do not change. | B. Gravity of stellar bodies does not change. | C. Light always travels in straight line. | D. Speed of light is always same.
Topic: Space, Defence and ICT | Year: 2021 | Subject: Science & Technology
'Triclosan', considered harmful when exposed to high levels for a long time, is most likely present in which of the following?
A. Food preservatives | B. Fruit-ripening substances | C. Reused plastic containers | D. Toiletries
Topic: Space, Defence and ICT | Year: 2021 | Subject: Science & Technology
With reference to street-lighting, how do sodium lamps differ from LED lamps? 1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps. 2. As street-lights, sodium lamps have longer life span than LED lamps. 3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant color advantages in street-lighting. Select the correct answer using the code given below.
A. 3 only | B. 2 only | C. 1 and 3 only | D. 1, 2 and 3
Topic: Lighting Technology | Year: 2021 | Subject: Science & Technology
Water can dissolve more substances than any other liquid because
A. it is dipolar in nature | B. it is a good conductor of heat | C. it has high value of specific heat | D. it is an oxide of hydrogen
Topic: General Science | Year: 2021 | Subject: Science & Technology
Consider the following: 1. Bacteria 2. Fungi 3. Virus Which of the above can be cultured in artificial/synthetic medium?
A. 1 and 2 only | B. 2 and 3 only | C. 1 and 3 only | D. 1, 2 and 3
Topic: Biotechnology and Health | Year: 2021 | Subject: Science & Technology
In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following? 1. Area of the hole in the lid 2. Temperature of the flame 3. Weight of the lid Select the correct answer using the code given below.
A. 1 and 2 only | B. 2 and 3 only | C. 1 and 3 only | D. 1, 2 and 3
Topic: Space, Defence and ICT | Year: 2021 | Subject: Science & Technology
Consider the following statements: 1. The Global Ocean Commission grants licences for seabed exploration and mining in international waters. 2. India has received licences for seabed mineral exploration in international waters. 3. Rare earth minerals are present on seafloor in international waters. Which of the statements given above are correct?
A. 1 and 2 only | B. 2 and 3 only | C. 1 and 3 only | D. 1, 2 and 3
Topic: General Science | Year: 2021 | Subject: Science & Technology
Who among the following was associated as Secretary with Hindu Female School which later came to be known as Bethune Female School?
A. Annie Besant | B. Debendranath Tagore | C. Ishwar Chandra Vidyasagar | D. Sarojini Naidu
Topic: Space, Defence and ICT | Year: 2021 | Subject: Science & Technology
Which one of the following is a filter feeder?
A. Catfish | B. Octopus | C. Oyster | D. Pelican
Topic: Biology | Year: 2021 | Subject: Science & Technology
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