Practise Discoveries & Invention MCQs in Everyday Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Study Discoveries & Invention through multiple-choice questions in Everyday Science. This subtopic contains 310 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
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آکسیجن کو کس نے دریافت کیا تھا؟
Answer: Priestley
Explanation Joseph Priestly discovered oxygen on August 1, 1774 . The most abundant element in the Earth's crust is oxygen . It making up 46.6% of Earth's mass.
Answer: Sweden
Explanation Europe's largest deposit of rare earth metals discovered in Sweden in January 2023.
سرج ٹینک کس لیے استعمال کیے جاتے ہیں۔
Answer: To guard against water hammers
Explanation
ماحول کی نمی کی پیمائش کسی آلے کے ذریعے کی جاتی ہے؟
Answer: Hygrometer
Explanation Humidity in the air was measured by a Hygrometer. **** A hygrometer is an instrument used to measure relative humidity. Humidity is the measure of the amount of moisture in the air. A psychrometer is an example of a hygrometer. hygrometer. *** The humidity in the air tells us about the ratio of Water vapors in the air
Answer: Johann Dobereiner
Explanation Johann Dobereiner, a German chemist, introduced the concept of 'triads' in 1817 Law of Triads, Groups of three elements with similar properties; middle element's atomic mass is average of others.
جوہری نمبر کی دریافت کے بعد ، سائنس دانوں نے نوٹ کیا کہ جوہری نمبر عناصر کو منظم طریقے سے ترتیب دینے کے لئے استعمال کیا جاسکتا ہے۔ جوہری نمبر کس نے دریافت کیا؟
Answer: Henry Moseley
Explanation The atomic number was discovered by Henry Moseley in 1910 . Henry Moseley was an English physicist.
پولیو ویکسین کس نے تیار کی؟
Answer: Jonas Edward Salk
Explanation Polio Vaccines : Developed to prevent poliomyelitis , a viral disease causing paralysis. Jonas Salk (US, 1950s ): Created the first inactivated (killed) polio vaccine ; tested on himself and family in 1953 ; officially used in 1955 . Albert Sabin (1961): Developed the live attenuated (weakened) oral polio vaccine. Recent Campaigns : Israel launched a polio vaccine drive in April 2022 after 1988 efforts . Last verified on 03-04-2026
وٹامنز کو کیسیمیر فنک نےکب دریافت کیا تھا۔
Answer: 1912
Explanation In 1912 , Casimir Funk originally coined the term "vitamine"
مندرجہ ذیل میں سے کس کی پاکیزگی کو لییکٹومیٹر سے ماپا جاتا ہے؟
Answer: Milk
Explanation Lactometer is used for milk ** A lactometer is an instrument that is used to check for the purity of milk by measuring its density. lactometer works on the principle of gravity of milk. ***
نظریہ ارتقاء کس نے پیش کیا؟
Answer: Charles Darwin
Explanation Charles Darwin is often credited with "discovering" evolution. He wrote about evolution from 1748 to 1859 It was the year when he published On the Origin of Species.
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