All MCQs - JEST Past Papers Practice | PakExamPoint

Practise All MCQs in JEST Past Papers. Attempt multiple-choice questions, check answers and revise related subtopics.

All MCQs and revision practice

Study All through multiple-choice questions in JEST Past Papers. This subtopic contains 992 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.

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All: questions and answer review

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241. A rectangle has 15 cm as its length and 150 cm² as its area. Its area is increased to 1 1/3 times the original area by increasing only its length. The new perimeter is ______?

Check answer and explanation

Answer: 60 cm

Explanation Given: Original length = 15 cm Original area = 150 cm² Original width = Area / Length = 150 / 15 = 10 cm New area = 1 1/3 times the original area = 4/3 × 150 = 200 cm² New length = New area / Width = 200 / 10 = 20 cm New perimeter = 2(Length + Width) = 2(20 + 10) = 2 × 30 = 60 cm

242. Which one translates the program written in assembly language into machine language instructions for execution?

اسیمبلی لینگویج کے پروگرام کو مشین لینگویج میں تبدیل کرتا ہے کہ کمپیوٹر ان ہدایات پر عمل درآمد ہو سکے۔ _____

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Answer: Assembler

Explanation An Assembler converts programs written in assembly language into machine language. It translates mnemonic codes into binary instructions the CPU can execute.

243. Instrument used for measuring the thickness/purity of milk is called what?

وہ اوزار جس سے دودھ کا گاڑھا پن یا خالص پن ناپا جاتا ہے، اسے کیا کہتے ہیں؟

Check answer and explanation

Answer: Lactometer

Explanation A lactometer is used to measure the purity and density (thickness) of milk . It checks if milk has been adulterated with water by measuring specific gravity. Works on the principle of buoyancy . Pure milk specific gravity: 1.028–1.032 at 15°C Last verified on 16-03-2026

244. Prophet Muhammad ﷺ belonged to __________ family.

نبی کریم صلی اللہ علیہ وسلم کا تعلق _______ خاندان سے تھا۔

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Answer: Hashmi

Explanation Prophet Muhammad belonged to the Banu Hashim (Hashimite) clan Named after his great-grandfather, Hashim ibn Abd Manaf, this clan was part of the Adnani Quraish. Tribe: Quraysh Parents: Abdullah ibn Abd al-Muttalib and Aminah bint Wahb NOTE: The Banu Hashim held a prestigious position in Mecca, often responsible for providing water to pilgrims at the Kaaba. Last updated 18-02-2026

245. Cyber bullying and harassment do not go through the experience of ______?

سائبر خوف زدگی اور ہراسمنٹ کے متاثرین ______ کے تجربے سے نہیں گزرتے ہیں؟

Check answer and explanation

Answer: Happiness

Explanation Cyber bullying often causes emotional distress, like frustration, fear, anxiety, and low self-esteem. Happiness is not one of the emotions typically experienced by victims.

246. The equation shows the thermal decomposition of magnesium carbonate (Mr = 84). MgCO₃ → MgO + CO₂. Which mass of magnesium oxide is formed when 21.0 g of magnesium carbonate are completely decomposed?

اگر 21.0 گرام میگنیشیم کاربونیٹ مکمل طور پر تحلیل ہو جائے تو کتنی مقدار میں میگنیشیم آکسائیڈ بنے گی؟

Check answer and explanation

Answer: 10.0g

Explanation Mr of MgCO₃ = 84 Mr of MgO = 24 + 16 = 40 Moles of MgCO₃ = 21.0 g ÷ 84 g/mol = 0.25 mol From equation: 1 mol MgCO₃ → 1 mol MgO So 0.25 mol MgCO₃ → 0.25 mol MgO Mass of MgO = 0.25 mol × 40 g/mol = 10.0 g Last verified on 11-04-2026

247. For which industry Pakistan’s city Wazirabad is famous?

پاکستان کا شہر وزیرآباد کس صنعت کے لیے مشہور ہے؟

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Answer: Cutlery

Explanation Wazirabad is a city in Punjab, Pakistan Famous for its cutlery products , it is known as the city of cutlery Division : Gujrat Municipal status : 1867 No. of Union Councils : 12

248. A small population endemic to an Island faces a sudden disaster that wiped 90% of the population. Such phenomena is called?

ایک چھوٹی آبادی جو ایک جزیرے میں محدود ہے، اچانک ایک آفت کا شکار ہو جاتی ہے اور %90 آبادی ختم ہو جاتی ہے۔ اس عمل کو کیا کہتے ہیں؟

Check answer and explanation

Answer: Bottleneck effect

Explanation When a sudden disaster drastically reduces a population size , it causes a loss of genetic variation. This random reduction is known as the bottleneck effect . The surviving population may not represent the original genetic diversity. It often leads to inbreeding and reduced adaptability. This is common in isolated populations like islands. Last verified on 12-04-2026

249. Evolution is supported by the presence of homologous structure because?

ارتقاء کی حمایت ہم جنس ڈھانچے کی موجودگی کیوں کرتی ہے؟

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Answer: They show common ancestry

Explanation Evolution explains how organisms change over time. Homologous structures have similar origin but different functions. They are found in different species with a common ancestor . Their structure indicates evolutionary relationships. Therefore, they support the idea of common ancestry . Last verified on 10-04-2026

250. Which among the following is not the stage of mitosis?

مندرجہ ذیل میں سے کون سا مائٹوسس کا مرحلہ نہیں ہے؟

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Answer: Cytophase

Explanation Cytophase is not a stage of mitosis. The stages of mitosis are: Prophase Metaphase Anaphase Telophase

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