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Environment & EcologyEasyAsked in: CDS · CDS-II 2026, GK

UNESCO World Heritage site Nanda Devi National Park is located in which one of the following States ?

  1. A.Arunachal Pradesh
  2. B.Uttarakhand
  3. C.Himachal Pradesh
  4. D.Sikkim

Correct answer

B. Uttarakhand

Explanation

The correct answer is B, Uttarakhand. Nanda Devi National Park lies in the Chamoli district of Uttarakhand, around India's second-highest peak, Nanda Devi.

The park is a vast glacial basin ringed by high peaks and was inscribed on the UNESCO World Heritage list in 1988 for its wild, untouched landscape. In 2005 the listing was extended to include the Valley of Flowers National Park, and the site is now called Nanda Devi and Valley of Flowers National Parks. It is the core of the Nanda Devi Biosphere Reserve and shelters the snow leopard, Himalayan musk deer and bharal. Nanda Devi itself rises to 7,816 metres.

Option A is wrong because Arunachal Pradesh is known for Namdapha National Park, not Nanda Devi. Option C is wrong because Himachal Pradesh's natural World Heritage Site is the Great Himalayan National Park in Kullu. Option D is wrong because Sikkim's World Heritage Site is Khangchendzonga National Park.

Exam tip: Nanda Devi and Valley of Flowers, Uttarakhand (1988, extended 2005); Khangchendzonga, Sikkim; Great Himalayan, Himachal.

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Q2.Environment & EcologyAsked in: CDS · CDS-II 2020, GKMedium

Which one of the following statements with regard to ozone is not correct?

  1. A.Ozone is found mostly at 15-55 km in the atmosphere.
  2. B.Ozone is produced by gaseous chemical reactions.
  3. C.16th November is celebrated as the International Day for the Preservation of the Ozone Layer.
  4. D.Ozone is a form of oxygen in which three oxygen atoms are bounded together.
Show answer
Correct answer: C. 16th November is celebrated as the International Day for the Preservation of the Ozone Layer.

The International Day for the Preservation of the Ozone Layer is observed on 16 September, not 16 November. The date marks the signing of the Montreal Protocol on 16 September 1987, the treaty that phased out chlorofluorocarbons and other ozone-depleting substances.

Q3.Environment & EcologyAsked in: CDS · CDS-II 2023, GKEasy

Energy and nutrients flow from one trophic level to another in an ecosystem. Which one of the following statements correctly describes the direction of flow of energy and nutrients in an ecosystem ?

  1. A.Energy flow is cyclic and nutrient flow is unidirectional.
  2. B.Energy flow is unidirectional and nutrient flow is cyclic.
  3. C.Both energy and nutrient flow are unidirectional.
  4. D.Both energy and nutrient flow are cyclic.
Show answer
Correct answer: B. Energy flow is unidirectional and nutrient flow is cyclic.

Energy passes one way from the Sun through the food chain and is lost as heat, while nutrients are used again and again.

Q4.Environment & EcologyAsked in: CDS · CDS-I 2024, GKMedium

Which one of the following is related to global dimming?

  1. A.Fall of atmospheric pressure due to increased particulates
  2. B.Rise of atmospheric pressure due to increased particulates
  3. C.Rise of temperature due to increased particulates
  4. D.Fall of temperature due to increased particulates
Show answer
Correct answer: D. Fall of temperature due to increased particulates

Global dimming is the drop in sunlight reaching the ground, and the cooling that follows, caused by particles in the air.