UPSC CAPF (AC) 2024 Paper I · Question 17

Question 17 of the UPSC CAPF (AC) 2024 Paper I (4 August 2024). Try it first, then open the answer and explanation.

1. CAPF 2024 · P-I · Q17 · General Science · Chemistry

   Which one among the following is an example of endothermic process?

   1. Combustion of carbon
   2. Mixing acid and alkali
   3. Photosynthesis
   4. Respiration

   निम्नलिखित में से कौन-सा, ऊष्माशोषी प्रक्रम का उदाहरण है?

   1. कार्बन का दहन
   2. अम्ल और क्षार को मिश्रित करना
   3. प्रकाश संश्लेषण
   4. श्वसन
   Show answer

   Answer: (3) Photosynthesis

   उत्तर: (3) प्रकाश संश्लेषण

   Photosynthesis absorbs light energy to build glucose from carbon dioxide and water (about +2800 kJ per mole of glucose), so it is endothermic. Combustion of carbon, neutralisation of an acid by an alkali and respiration all release heat, so they are exothermic.

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