Quiz 2021: Prelims Power Play 14 July 2021

1. Scientists discover two species of few-electron bubbles in superfluid helium. Consider the following statements about electron bubbles:

1. An electron bubble is the empty space created around a free electron in a cryogenic gas or liquid such as neon or helium.
2. As the temperature is lowered the electron mobility in helium increases.

Select the correct answer from the code given below:

2. With reference to the process of Eutrophication, consider the following statements:

1. It can lead to hypoxia (“dead zones”) causing fish kills and a decrease in aquatic life.
2. It may cause algal blooms.

Select the correct answer using the code given below.

3. Consider the following statements regarding Cabinet Committee

1. It is a constitutional body
2. All cabinet Committees are headed by PM.
3. The number of cabinet committee and its members are fixed in the constitution.

Which of the statements given above is/are correct?

4. LED lighting is very different from other lighting sources such as incandescent bulbs and CFLs. Which of the following statements is true in this context

1. LEDs emit very little heat. In comparison, incandescent bulbs release 90% of their energy as heat and CFLs release about 80% of their energy as heat.
2. LEDs emit light in a specific direction, reducing the need for reflectors and diffusers that can trap light. With other types of lighting, the light must be reflected to the desired direction and more than half of the light may never leave the fixture.

Select the correct answer using the code given below.

5. With respect to Martial arts in India, consider the following statements:

1. Thang-ta is an armed martial art created by the Meities of Manipur.
2. Pari-khanda involves fighting using sword and shield is an ancient martial art from Gujarat.
3. Gatka is a weapon based martial art form, performed by the Sikhs of Punjab.

Which of the statements given above is/are incorrect?