General Science Class 7 MCQs MCQs - General Science Practice | PakExamPoint
Practise General Science Class 7 MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
General Science Class 7 MCQs MCQs and revision practice
Study General Science Class 7 MCQs through multiple-choice questions in General Science. This subtopic contains 255 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these General Science Class 7 MCQs 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.
جب کوئی چیز روشنی کے تمام اجزاء کے رنگوں کی عکاسی کرتی ہے، تو یہ _____ ظاہر ہوتا ہے؟
A. Green
B. Black
C. Dark
D. White
Check answer and explanation
Answer: White
Explanation When an object reflects all the component colors of light, it appears white . This is because the object is reflecting all the wavelengths of visible light, which are then perceived by our eyes as white. If an object absorbs all seven colors of light (i.e., all the wavelengths of visible light), it appears black .
صوتی لہریں سالوینٹس میں _____ کی شکل میں سفر کرتی ہیں؟
A. Electromagnetic Waves
B. Mechanical Waves
C. Longitudinal Waves
D. Transverse Waves
Check answer and explanation
Answer: Longitudinal Waves
Explanation Sound waves in solvents (like liquids) travel as longitudinal waves , where particles vibrate parallel to the direction of wave propagation. These are a type of mechanical wave , requiring a medium to travel. Last verified on 19-03-2026
آئنز ایٹموں کے چارج شدہ ذرات ہیں اور ____ کی وجہ سے منفی اور مثبت چارجز بناتے ہیں؟
A. Neutron
B. Electron
C. None of these
D. Proton
Check answer and explanation
Answer: Electron
Explanation Ions are charged particles formed when an atom gains or loses electrons . Loss of electrons creates a positively charged ion (cation) . Gain of electrons creates a negatively charged ion (anion). Last verified on 17-03-2026
ریفریجریٹر کے پچھلے حصے میں کولنگ فین سیاہ اور کھردری سطح سے بنے ہیں کیونکہ ____؟
A. They are not important for heat transfer
B. They are good insulators of heat
C. They are good conductors of heat
D. They are good radiators of heat
Check answer and explanation
Answer: They are good radiators of heat
Explanation The cooling fins at the back of a refrigerator are typically made of a black, rough surface to maximize heat radiation. This design: Increases the surface area for heat transfer Absorbs heat from the surrounding air Emits heat more efficiently due to the rough surface
Explanation The color of a star is primarily determined by its surface temperature. Stars come in a range of colors, including red, orange, yellow, white, and blue , which are indicative of their surface temperatures. The hotter the star, the bluer it appears, while the cooler the star, the redder it appears.
مندرجہ ذیل میں سے کون سی گولیاں پانی صاف کرنے کے لیے استعمال ہوتی ہیں؟
A. Antibiotic
B. Aspirin
C. Halazone
D. Vitamin C
Check answer and explanation
Answer: Halazone
Explanation Halazone tablets are used to purify drinking water by killing bacteria and pathogens . Commonly used in emergencies, military, or travel situations where safe water is unavailable. Halazone tablets can purify 1 liter of water in about 5–10 minutes . Last verified on 19-03-2026
سورج سے گرمی زمین تک لہروں کی شکل میں پہنچتی ہے جسے _____ کہتے ہیں؟
A. Conduction
B. None of these
C. Convection
D. Radiation
Check answer and explanation
Answer: Radiation
Explanation The heat from the Sun reaches Earth in the form of electromagnetic waves, which is called radiation . This includes ultraviolet (UV) rays, visible light , and infrared (IR) rays. Radiation is the transfer of energy through electromagnetic waves , without the need for a medium like air or water .
Explanation Digestion specifically means the mechanical and chemical breakdown of food into simpler substances. Mechanical digestion includes chewing and churning, while chemical digestion involves enzymes and acids. Additional information : Main 5 processes of the digestive system: Ingestion – taking food into the body Digestion – mechanical and chemical breakdown of food Absorption – nutrients enter blood through the intestine Assimilation – cells use absorbed nutrients Egestion – removal of undigested waste Last verified on 13-03-2026
مندرجہ ذیل میں سے کون سا آئسوٹوپ تھائرائڈ گلینڈ کے کام کی تشخیص کے لیے استعمال کیا جاتا ہے؟
A. Gallium - 67
B. Iodine - 123
C. Cobalt - 60
D. Copper - 64
Check answer and explanation
Answer: Iodine - 123
Explanation Iodine-123 is used for the diagnosis of thyroid gland function. It is a radioactive isotope that helps in imaging and evaluating the performance of the thyroid gland.
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