1. Consider the following statements:
- The end of heliopause is called the heliosphere.
- The heliosphere acts as a shield that protects the planets from interstellar radiation.
- The heliosphere is created by the solar wind.
Which of the statements given above is/are correct?
[A] Only 1
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3
Show Answer
Correct Answer: B [Only 2 & 3]
Notes:- The sun sends out a constant flow of solar material called the solar wind, which creates a bubble around the planets called the heliosphere.
- The end of heliosphere is called heliopause.
- The heliosphere acts as a shield that protects the planets from interstellar radiation.
- NASA’s Interstellar Mapping and Acceleration Probe (IMAP) mission set to be launched in 2025 will also explore heliosphere.
2. Consider the following pairs of colours used in Holi and their respective ingredients:
- Black – Lead oxide
- Green – Copper sulphate
- Silver – Aluminium bromide
- Red – Mercury sulphate
Which of the pairs given above are matched correctly?
[A] Only 1 & 4
[B] Only 2 & 3
[C] Only 1, 2 & 4
[D] 1, 2, 3 & 4
Show Answer
Correct Answer: D [1, 2, 3 & 4]
Notes:- Holi colour generally contains:
- Black – Lead oxide
- Green – Copper sulphate and Malachite green
- Silver – Aluminium bromide
- Blue – Prussian blue
- Red – Mercury sulphate
3. Consider the following statements:
- Scrub typhus infection is caused by the virus Orientia tsutsugamushi.
- Scrub typhus is transmitted to humans by bites from tiny infected mites.
- Symptoms include fever associated with headaches, coughs, shortness of breath, confusion and disorientation.
Which of the statements given above is/are correct?
[A] Only 1
[B] Only 1 & 2
[C] Only 2 & 3
[D] 1, 2 & 3
Show Answer
Correct Answer: C [Only 2 & 3]
Notes:- Scrub typhus infection is caused by the bacteria Orientia tsutsugamushi.
- Scrub typhus is transmitted to humans by bites from tiny infected mites.
- It is a major public health threat in India, other South Asian countries, and around the tropics.
- Symptoms include fever associated with headaches, coughs, shortness of breath, confusion and disorientation.
- Till date, monotherapies using either doxycycline or azithromycin was the commonly used treatment. Combination therapy with doxycycline and azithromycin is more effective than monotherapies is now identified.
