UPSC Previous Year Question

 Consider the following trees: 1. Jackfruit (Artocarpus heterophyllus) 2. Mahua (Madhuca indica) 3. Teak (Tectona grandis) How many of the above are deciduous trees? (a) Only one (b) Only two (c) All three (d) None UPSC pre-2023 Answer -B  Analysis  Medium, NCERT class 11  India Physical Environment Jackfruit, is an evergreen tree native to tropical Asia. 1 is not correct.  It is widely grown throughout the wetland tropics for its large fruits and durable wood. It is the largest tree-borne fruit in the world, reaching up to 60 cm long and weighing up to 18 kg. 1 is not correct. Tropical Deciduous Forests AKA monsoon forests These are the most widespread forests in India. Rainfall - 70 -200 Type - Moist and Dry deciduous  Moist deciduous forests -  Rainfall between 100-200 cm. Location -  NE states along the foothills of the Himalayas,  eastern slopes of the Western Ghats and Odisha.  Main species   Teak, sal, shisham, hurra, mahua, amla, semul, kusum, and sandalwood etc. Dry deciduous

 Consider the following pairs: Port:                             Well known as 1. Kamarajar Port :  First major port in India registered as a company 2. Mundra Port :      Largest privately owned port in India 3. Visakhapatnam:   Largest container port in India How many of the above pairs are correctly matched? (a) Only one pair (b) Only two pairs (c) All three pairs (d) None of the pairs Answer - B  Analysis  Medium, Current affair  Explanation  Kamarajar Port,  first port in India which is a public company. So, 1 is true. Mundra Port is largest privately owned port in India.  . So, 2 is true. Visakhapatnam is not the largest container port in India. So 3 is wrong. Jawaharlal Nehru Port Authority (JNPA) at Navi Mumbai is the largest container port. In Future their location based question can be asked  Kamarajar Port, located near the Coromandel Coast. Mundra port is Located in the Kutch district of the state of Gujarat.

 Consider the following statements: 1. Jhelum River passes through Wular Lake. 2. Krishna River directly feeds Kolleru Lake 3. Meandering of Gandak River formed Kanwar Lake. How many of the statements given above are correct? (a) Only one (b) Only two (c) All three (d) None Upsc pre 2023 Answer - A Analysis  Difficult, Current affair  Explanation  Tip  UPSC ask about lakes which are news especially due to negative reasons. Wular Lake is in Jammu and Kashmir which is fed by River Jhelum. So, 1 is true. Kolleru Lake is in Andhra Pradesh  is a natural eutrophic lake, situated between the two major river basins of the Godavari and the Krishna, fed by two seasonal rivers Budameru and Tamleru. Kanwar lake is a dying lake in Bihar.  It is Asia’s largest freshwater oxbow lake,  It is a residual oxbow lake, formed due to the meandering of the Burhi Gandak river, a tributary of Ganga. Expected questions in UPSC pre-2024, UPSC pre-2025, UPSC pre 2026 Wular Lake is Asia's 2nd largest fresh-wat

Consider the following: 1. Aerosols 2. Foam agents 3. Fire retardants 4. Lubricants In the making of how many of the above are hydrofluorocarbons used? (a) Only one (b) Only two (c) Only three (d) All four Upsc pre 2023 Analysis  - Difficult Explanation  What is Hydrofluorocarbons (HFCs)?   They are a group of chemicals used for cooling and refrigeration It is used in  insulating foams and aerosol propellants,  fire protection, Synthetic lubricant. Expected question in future.... Why HFCs are used? They were developed to replace stratospheric ozone depleting substances that are currently being phased out under the Montreal Protocol on Substances that Deplete the Ozone Layer. HFCs represent only 1% of total greenhouse gas but its impact is much higher than carbon dioxide per unit mass. What is Kigali Amendment to montreal protocol? It entered into force in 2019. Under this, countries commit to cut the production and consumption of HFCs by more  than 80% over the next 30 years.

Which one of the following makes a tool with a stick to scrap insects from a hole in a tree or a log of wood? (a) Fishing cat (b) Orangutan (c) Otter (d) Sloth bear UPSC pre 2023 Answer- B  Analysis  Difficult  Orangutans are great apes native to the rainforests of Indonesia and Malaysia.  They are now found only in parts of Borneo and Sumatra. They are non native to India. Fishing cat is a medium-sized wild cat of South and Southeast Asia. Since 2016, it is listed as Vulnerable on the IUCN Red List Tip - Previous year question could have helped you. From the point of view of the evolution of living organisms, which one of the following is the correct sequence of evolution? (2010) (A) Otter - Tortoise — Shark  (B) Shark - Tortoise - Otter (C) Tortoise - Shark - Otter  (D) Shark - Otter - Tortoise Answer - B  Shark - Scientists believe that sharks came into existence around 400 million years ago. Tortoise - 250 MYA  Otter - 23 MYA  Otters are carnivorous mammals in the subfamily Lutrina

UPSC pre 2023  Consider the following statements: 1.Some microorganisms can grow in environments with temperature above the boiling point of water. 2.Some microorganisms can grow in environments with temperature below the freezing point of water. 3.Some microorganisms can grow in highly acidic environment with a pH below 3. How many of the above statements are correct? (a) Only one (b) Only two (c) All three (d) None Answer - C  Tip - Usually statement having Some are correct. Example - UPSC pre 2023 https://upscpreviousyearquestion.blogspot.com/2024/01/consider-following-statements-1-some.html Tip Question asked in UPSC pre exam specially in environment is getting random or difficult becasue Indian forest  service pre is clubbed together with upsc pre exam. So, do not worry about difficult pre question of environment because your competition will not be able to do it. Archaea is a domain of single-celled organisms. These microorganisms lack cell nuclei and are therefore prokaryotes. P