831Every Day ScienceMedium
SI unit of light is _________ ?
Awatt
MCQs
Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.
Correct answer
B. Candela
Explanation
Candela is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Mercury and Bromine
Explanation
Mercury and Bromine is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Artificial radioactivity
Explanation
Artificial radioactivity is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Carbon Dioxide
Explanation
Carbon dioxide (CO2) is used in some hand-held extinguishers and in fixed systems to displace oxygen and smother the fire. CO2 is used in some dry chemical (powder) hand-held and wheeled extinguishers as a propellant to expel the agent (dry chemical) which, through a chemical reaction, extinguishes the fire.
Correct answer
B. North and south pole
Explanation
North and south pole is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. seven colours
Explanation
seven colours is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Astronomy
Explanation
Astronomy is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Milk
Explanation
The Correct answer is B. Milk and milk products are good sources of vitamin B12. Many ready-to-eat breakfast cereals are fortified with vitamin B12. Fish and red meat are excellent sources of vitamin B12. Poultry and eggs also contain vitamin B12. { "@context": "https://schema.org/", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": "Which of the following is a rich source of Vitamin B-12?", "answerCount": 1, "acceptedAnswer": { "@type": "Answer", "text": "The Correct answer is A. Milk ", "author": { "@type": "Organization", "name": "PakMcqs" }, "upvoteCount": 1507, "url": "https://pakmcqs.com/everyday-science-mcqs/which-of-the-following-is-a-rich-source-of-vitamin-b-12" }, "text": "Which of the following is a rich source of Vitamin B-12?", "author": { "@type": "Organization", "name": "PakMcqs" }, "upvoteCount": 1507 } }
Correct answer
B. 25640 Lightyears
Explanation
25640 Lightyears is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. 9
Explanation
Octopuses have 9 brains because, in addition to the central brain, each of 8 arms has a mini-brain that allows it to act independently. Octopuses have blue blood because they have adapted to cold, low oxygen water by using hemocyanin, a copper rich protein.