Practise General Science Class 7 MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
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.
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پروٹون ایک الیکٹران سے کتنی بار بھاری ہے؟
Answer: 1836
Explanation The mass of the proton is almost 1836 times heavier than that of an electron . while A neutron is 1842 times heavier than an electron .
اگر نظام انہضام کا ردھم عمل سست ہو جائے تو _____؟
Answer: Constipation
Explanation When the rhythmic action of the digestive tract (peristalsis) slows down, it can lead to constipation. Peristalsis is the coordinated muscle contraction and relaxation that moves food through the digestive system.
عام انسانی کان کی قابل سماعت حد ____ ہے؟
Answer: 20 Hz to 20kHz
Explanation The normal human ear can hear sounds between 20 Hz (low pitch) and 20,000 Hz (high pitch). Sounds below 20 Hz are called infrasound , and above 20 kHz are ultrasound , both inaudible to humans.
ہارٹ اٹیک کو سائنسی طور پر کیا کہا جاتا ہے؟
Answer: Myocardial Infarction
Explanation Myocardial Infarction (MI) is the scientific term for a heart attack. It occurs when the blood flow to the heart is blocked , causing damage to the heart muscle.
سات رنگوں کے بینڈ کو _____ کہتے ہیں؟
Answer: Spectrum
Explanation A spectrum is a band of seven colors that appear when white light is passed through a prism or a similar device , separating the different wavelengths of light. The seven colors of the spectrum, in order, are : Red Orange Yellow Green Blue Indigo Violet
حرارتی توانائی کو ______ کے ذریعے منتقل کیا جا سکتا ہے؟
Answer: All of these
Explanation Thermal energy can be transferred through all three methods: Conduction : Direct transfer between particles in physical contact. Convection : Transfer through the movement of fluids. Radiation : Transfer through electromagnetic waves (e.g., light, radio waves). Last verified on 13-03-2026
مندرجہ ذیل میں سے کون سا آئسوٹوپ آئرن میٹابولزم اور سرخ خون کے خلیات کے مناسب کام کے مطالعہ میں استعمال ہوتا ہے؟
Answer: Iron - 59
Explanation Iron-59 is used in studies of iron metabolism and the proper functioning of red blood cells (RBCs). It is a radioactive isotope that helps trace the movement and utilization of iron in the body.
جب سفید روشنی کسی پرزم سے گزرتی ہے تو یہ کتنے رنگوں میں تقسیم ہو جاتی ہے؟
Answer: 7
Explanation When white light passes through a prism, it splits into 7 colors , forming a spectrum known as a rainbow : Red Orange Yellow Green Blue Indigo Violet The separation of visible light into its different colours is known as dispersion.
خوراک نگلتے وقت کیا ہوتا ہے؟
Answer: The epiglottis closes
Explanation During swallowing, the epiglottis (a flap of cartilage) folds down. It closes the opening of the trachea (windpipe) so that food enters the esophagus instead of the airway. This protective mechanism prevents choking and food entering the lungs. Last verified on 15-03-2026
وہ کونسا طریقہ ہے جو نقصان دہ مائکروجنزموں کو مارتا ہے اور پانی سے پیدا ہونے والی بیماریوں جیسے ہیضہ، پیچش اور ٹائیفائیڈ کو پھیلنے سے روکتا ہے؟
Answer: Chlorination
Explanation Chlorination is the process of adding disinfectants , such as chlorine, to water to kill harmful microorganisms. It prevent the spread of waterborne diseases.
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