Everyday Science
Q1. At what temperature does water boil at sea level?
Correct Answer: A. 100 degrees Celsius
Explanation: At standard atmospheric pressure (sea level), pure water boils exactly at 100 degrees Celsius (212 degrees Fahrenheit).
Explanation: At standard atmospheric pressure (sea level), pure water boils exactly at 100 degrees Celsius (212 degrees Fahrenheit).
Q2. At what temperature does water freeze?
Correct Answer: A. 0 degrees Celsius
Explanation: Pure water freezes and shifts into ice at 0 degrees Celsius (32 degrees Fahrenheit) under standard atmospheric pressure conditions.
Explanation: Pure water freezes and shifts into ice at 0 degrees Celsius (32 degrees Fahrenheit) under standard atmospheric pressure conditions.
Q3. Deficiency of which vitamin causes scurvy?
Correct Answer: A. Vitamin C
Explanation: Scurvy is an explicit nutritional deficiency disease caused by a severe lack of Vitamin C (ascorbic acid), which is found abundantly in citrus fruits and amla.
Explanation: Scurvy is an explicit nutritional deficiency disease caused by a severe lack of Vitamin C (ascorbic acid), which is found abundantly in citrus fruits and amla.
Q4. Deficiency of which vitamin causes night blindness?
Correct Answer: A. Vitamin A
Explanation: Night blindness (Nyctalopia) is caused by a persistent deficiency of Vitamin A. Carrots and green leafy vegetables serve as rich dietary replenishment sources.
Explanation: Night blindness (Nyctalopia) is caused by a persistent deficiency of Vitamin A. Carrots and green leafy vegetables serve as rich dietary replenishment sources.
Q5. Rickets in children is caused by deficiency of which vitamin?
Correct Answer: A. Vitamin D
Explanation: Rickets leads to soft, weak, and malformed bone development in growing children and is directly triggered by a lack of Vitamin D.
Explanation: Rickets leads to soft, weak, and malformed bone development in growing children and is directly triggered by a lack of Vitamin D.
Q6. Which disease is caused by the Plasmodium parasite?
Correct Answer: A. Malaria
Explanation: Malaria is caused by protozoan microscopic Plasmodium parasites, which are transmitted into humans via infected female Anopheles mosquito bites.
Explanation: Malaria is caused by protozoan microscopic Plasmodium parasites, which are transmitted into humans via infected female Anopheles mosquito bites.
Q7. Which disease is spread by Aedes mosquito?
Correct Answer: A. Dengue
Explanation: Dengue viral fever spreads rapidly through vectors, specifically transmitted to hosts by the bites of female Aedes aegypti mosquitoes.
Explanation: Dengue viral fever spreads rapidly through vectors, specifically transmitted to hosts by the bites of female Aedes aegypti mosquitoes.
Q8. Insulin is produced by which organ in the human body?
Correct Answer: A. Pancreas
Explanation: Insulin, the primary endocrine chemical hormone governing vital blood glucose regulation, is manufactured by specialized beta cells inside the pancreas.
Explanation: Insulin, the primary endocrine chemical hormone governing vital blood glucose regulation, is manufactured by specialized beta cells inside the pancreas.
Q9. Which gas do plants absorb from the atmosphere during photosynthesis?
Correct Answer: A. Carbon dioxide
Explanation: Throughout active photosynthesis, plants absorb ambient carbon dioxide gas to synthesis carbohydrates and generate byproduct oxygen into the air via solar energy and chlorophyll structures.
Explanation: Throughout active photosynthesis, plants absorb ambient carbon dioxide gas to synthesis carbohydrates and generate byproduct oxygen into the air via solar energy and chlorophyll structures.
Q10. Which is the richest source of Vitamin C among the following?
Correct Answer: A. Amla
Explanation: Indian gooseberry (amla) holds exceptionally dense concentrations of natural Vitamin C relative to other general fruits.
Explanation: Indian gooseberry (amla) holds exceptionally dense concentrations of natural Vitamin C relative to other general fruits.
Q11. Which mineral is essential for the formation of haemoglobin?
Correct Answer: A. Iron
Explanation: Iron forms the core mineral requirement for building oxygen-binding haemoglobin inside red blood cells; its structural deficiency leads straight to iron-deficiency anaemia.
Explanation: Iron forms the core mineral requirement for building oxygen-binding haemoglobin inside red blood cells; its structural deficiency leads straight to iron-deficiency anaemia.
Q12. Goitre is caused by deficiency of which element?
Correct Answer: A. Iodine
Explanation: Goitre involves an abnormal morphological enlargement of the thyroid gland due to a systemic deficiency of essential iodine elements in dietary inputs.
Explanation: Goitre involves an abnormal morphological enlargement of the thyroid gland due to a systemic deficiency of essential iodine elements in dietary inputs.