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General Science MCQ Practice
Practice General Science questions with instant scoring, correct answer highlighting, detailed solutions and first-click AI explanation caching for missing explanations.
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Q. 3861
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Which amongst the following is the largest endocrine gland in the body?
Answer: A. Thyroid
- The thyroid is the largest pure endocrine gland, located in the neck and producing hormones T3/T4 and calcitonin.
- Other options are smaller glands: parathyroid, adrenal, and pituitary.
- Key concept: endocrine glands secrete hormones directly into the blood; thyroid mass makes it the largest among endocrine organs.
- Tip: Remember “largest endocrine gland” = thyroid—distinct from the liver (not purely endocrine) in size.
Q. 3860
👁 1 views
The pH of human blood is:
Correct answer: D
- Why it’s correct: Normal human blood pH is tightly regulated around 7.4 (slightly basic). The body maintains this via buffering systems and organ regulation.
Q. 3859
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In coriander the useful parts are:
Correct answer: C — leaves & dried fruits
- Why: Coriander leaves (cilantro) are used fresh for aroma and garnish, while the dried fruits (seeds) are widely used as spice. This covers the edible parts: leaves and dried fruits.
- Key concept: Different plant parts have different culinary uses; coriander seeds are dried fruits, not berries or roots.
- Tip: If a question asks “useful parts,” think of what is commonly used in cooking as the edible leafy part and the dried fruit/seed part.
- Why others are incorrect: Roots are not commonly used; flowers are not the main usable part; dried fruits are correct in combination with leaves.
Q. 3858
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Which of the following minerals is found in Monazite sand ?
Answer: C. Thorium
- Reason: Monazite sand is rich in phosphate minerals containing rare earths and thorium, with thorium-232 commonly present as an impurity/ constituent.
- Key concept: Thorium is a fertile material used in nuclear energy; monazite concentrates are a primary ore source.
- Quick note on options: Potassium and sodium are common alkali minerals not characteristic of monazite; uranium can be present but is not the defining mineral of monazite sands.
- Exam tip: If asked about monazite composition, prioritize thorium content over alkali elements.
Q. 3857
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Who invented vaccination for 'small pox'?
Correct option: C
- Explanation: Edward Jenner developed the first vaccine for smallpox using material from cowpox lesions to induce immunity. This concept—vaccination—uses a harmless or weaker pathogen to train the immune system.
- Key concept: Immunization by exposing the body to a less dangerous version of a pathogen to build protection.
- Why others are incorrect: Banting (insulin), Fleming (penicillin), Pasteur advanced vaccines but did not invent the smallpox vaccine.
- Exam tip: Remember “Jenner’s cowpox” as the origin of vaccination.
Q. 3856
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The optimum dissolved oxygen level (in mg/litre) required for survival of aquatic organism is:
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Q. 3855
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Iodoform is used as an:
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Q. 3854
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White lung disease is prevalent among the workers of:
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Q. 3853
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The addition of gypsum to Portland cement helps in:
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Q. 3852
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Which of the following could be used as fuel in propellant of rockets?
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