Explorers and Inventors MCQs - General Knowledge Practice | PakExamPoint

Practise Explorers and Inventors MCQs in General Knowledge. Attempt multiple-choice questions, check answers and revise related subtopics.

Explorers and Inventors MCQs and revision practice

Study Explorers and Inventors through multiple-choice questions in General Knowledge. This subtopic contains 379 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.

Use these Explorers and Inventors MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.

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Explorers and Inventors: questions and answer review

Try each question before opening its answer. Record the concept behind each mistake and revisit it during your next practice session.

221. Who developed oral polio vaccine

کس نے زبانی پولیو ویکسین تیار کی۔

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Answer: Albert Sabin

Explanation Albert Bruce Sabin was a Polish American medical researcher. Known for developing the oral polio vaccine which has played a key role in nearly eradicating the disease.

222. Multiple Nuclei Model was presented in?

ملٹیپل نیوکلیئر ماڈل کس نے پیش کیا تھا؟

Check answer and explanation

Answer: 1945

Explanation The multiple nuclei model is an economical model The multiple nuclei model is created by Chauncy Harris and Edward Ullman in the 1945 article "The Nature of Cities" The model describes the layout of a city, based on Chicago Chicago, Illinois , a city that outgrew its CBD ND16-3-2023

223. Universal Grammar was introduced by:

ونیورسل گرامرکو کس نے متعارف کرایا گیا تھا

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Answer: Noam Chomsky

Explanation Universal grammar was introduced by linguistics professor Noam Chomsky in the 1960s. His theory states that all humans are naturally born with the ability to acquire, develop, and understand language.

224. Which company designed the world's first Smart phone?

دنیا کا پہلا سمارٹ فون کس کمپنی نے ڈیزائن کیا؟

Check answer and explanation

Answer: IBM

Explanation The first smartphone, created by IBM Invented in 1992 Released for purchase in 1994 .

225. Facebook headquarters located:

فیس بک ہیڈ کوارٹر کہاں واقع ہے

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Answer: California

Explanation Founded February 4, 2004 Headquarters: Menlo Park, California, U.S. Facebook was founded by Mark Zuckerberg, along with his fellow roommates

226. The Nobel Prize in Physiology or Medicine 2025 was awarded for discoveries concerning?

دو ہزار پچیس میں فزیالوجی یا طب کا نوبل انکشافات کے لیے دیا گیا جس سے متعلق تھا؟

Check answer and explanation

Answer: Peripheral immune tolerance

Explanation The 2025 Nobel Prize in Physiology or Medicine recognized work o n peripheral immune tolerance Awarded jointly to Mary E. Brunkow, Fred Ramsdell, and Shimon Sakaguch They identified regulatory T cells (Tregs)—the immune system’s "security guards"—and the FOXP3 gene,

227. Who coined the term Ecosystem?

ایکو سسٹم کی اصطلاح کس نے وضع کی؟

Check answer and explanation

Answer: Tansely

Explanation George Tansley was an English botanist and a pioneer in the science of ecology

228. Solar (Sun) Eclipse occurs when _______?

سورج گرہن اس وقت ہوتا ہے جب _______؟

Check answer and explanation

Answer: The moon comes between earth and sun

Explanation A solar eclipse can only take place during the phase of the new moon when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.

229. Who invented zero first in India?

ہندوستان میں سب سے پہلے صفر کی ایجاد کس نے کی؟

Check answer and explanation

Answer: Brahmagupta

Explanation Brahmagupta , an astronomer and mathematician from India used zero in mathematical operations like addition and subtraction. Aryabhatta introduced zero in 5th century. Brahmagupta introduced zero in calculations in around 628 AD.

230. Baltura Glacier is located in _____________ ?

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Answer: Gilgit Baltistan

Explanation The length of Baltur Glacier is 62KM (39 mi) one of the longest glaciers outside the polar regions. It is located in the Gilgit-Baltistan region of Pakistan. It runs through part of the Karakoram mountain range.

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