Atmosphere MCQs - Everyday Science Practice | PakExamPoint
Practise Atmosphere MCQs in Everyday Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Atmosphere MCQs and revision practice
Study Atmosphere through multiple-choice questions in Everyday Science. This subtopic contains 291 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these Atmosphere 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.
Explanation Note: according to Fpsc answer key the correct ans is green light Since the maximum absorption by chlorophyll occurs in red light. It is the most effective wavelength for photosynthesis . Chlorophyll strongly absorbs red light. Thus it is effective at photosynthesis. All important questions and Information Related to 'Photosynthesis" Photosynthesis takes place in the presence of the following light Only in sunlight from the sun Photosynthesis takes place faster in white light Photosynthesis occurs more in blue and red light rays Photosynthesis occurs more in blue and red light rays and less , or not at all, in green light rays. ND2-03-2023
مندرجہ ذیل میں سے کون سی گیس فضائی آلودگی کا ذریعہ نہیں ہے؟
A. SO₂
B. None of these
C. NO₂
D. N₂
Check answer and explanation
Answer: N₂
Explanation Nitrogen (N₂) makes up 78% of Earth's atmosphere and is not a pollutant . NO₂ and SO₂ are major air pollutants from vehicles and industries.
Explanation Grass is a tree which means بانس Bamboo is mostly found in Asia, Africa, South America, and parts of North America Bamboo releases 35 % more oxygen than hardwood forests of equivalent sizes Bamboo is the fastest-growing plant. Bamboo blossoms once a lifetime of a human. Bamboo can thrive without much care. Bamboo is the world's tallest grass. Bamboo can live for a century or more. Bamboo has been used as an alternative building material for centuries. SH10-8-2023
Explanation Soil pollution can be caused by acid rain . It is a type of precipitation that contains high levels of sulfuric and nitric acid . This can occur when fossil fuels are burned, releasing sulfur dioxide and nitrogen oxides into the atmosphere, which then combine with water and oxygen to form acid rain. Acid rain can alter the pH of the soil, making it more acidic and potentially harmful to plants and microorganisms.
Explanation The stratosphere is the layer of the atmosphere where the ozone layer is present. It extends from approximately 12 to 50 kilometers (7.5 to 31 miles) above the Earth's surface. The ozone layer is a critical component of the Earth's atmosphere, as it absorbs harmful ultraviolet (UV) radiation from the sun, protecting life on Earth.
کس علاج میں گندے پانی کو فلٹر کیا جاتا ہے ، کلورین سے جراثیم کشی کی جاتی ہے اور کوئی بچا ہوا نمک ہٹا دیا جاتا ہے؟
A. Tertiary
B. Primary
C. Secondary
D. None of these
Check answer and explanation
Answer: Tertiary
Explanation Tertiary treatment involves filtering, chlorination, and removing salts to further purify wastewater. It is the final and most advanced stage of wastewater treatment.
ان میں سے کون سا ماحول کی ساخت میں سب سے زیادہ غالب ہے؟
A. Carbon dioxide
B. Oxygen
C. Water vapour
D. Nitrogen
Check answer and explanation
Answer: Nitrogen
Explanation Nitrogen (N2) is the most abundant gas in the Earth's atmosphere They make up about 78 % of the atmosphere's composition. Oxygen (O2) is the second most abundant gas
Explanation Using recycled and reusable materials reduces waste and conserves natural resources. It also lowers pollution and the need for raw material extraction.
فضا میں کلوروفلوروکاربنز کے اخراج سے ______ تباہ ہو گیا؟
A. Clouds
B. Ozone layer
C. Oxygen
D. Air
Check answer and explanation
Answer: Ozone layer
Explanation Chlorofluorocarbons (CFCs) are chemical compounds used in refrigerators, air conditioners, and aerosol sprays . When released into the atmosphere, CFCs destroy the ozone layer by breaking down O₃ molecules. The ozone layer protects Earth from harmful ultraviolet (UV) radiation. Last verified on 10-03-2026
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