General Science Class 9 MCQs MCQs - General Science Practice | PakExamPoint
Practise General Science Class 9 MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
General Science Class 9 MCQs MCQs and revision practice
Study General Science Class 9 MCQs through multiple-choice questions in General Science. This subtopic contains 366 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 9 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.
الیکٹران خوردبین کے اعلی ریزولوشن کے لئے کیا ذمہ دار ہے؟
A. High magnification
B. Use of heavy metals strains
C. Short wavelength of the electron beam
D. Very thin section
Check answer and explanation
Answer: Short wavelength of the electron beam
Explanation The high resolution of the electron microscope is primarily due to the short wavelength of the electron beam. This shorter wavelength allows for higher resolution and the ability to visualize smaller structures.
کسی مائع کو اس کا درجہ حرارت تبدیل کیے بغیر گیس میں تبدیل کرنے کے لیے حرارتی توانائی کی منتقلی کو _____ کہتے ہیں؟
A. Latent heat of melting
B. Latent heat of freezing
C. Latent heat of vaporization
D. Latent heat of boiling
Check answer and explanation
Answer: Latent heat of vaporization
Explanation Latent heat of vaporization is the energy required to change a liquid into a gas (or vice versa) without changing its temperature. Latent heat of fusion is the energy required to change a solid into a liquid (or vice versa) without changing its temperature.
Explanation Hydroiodic acid (HI) is the strongest acid. The acidity of hydrohalic acids increases down the group in the periodic table. Due to the decreasing bond strength and increasing bond length.
کلوروپلاسٹ دوہری جھلی سے منسلک آرگنیل ہے جس میں نیم سیال پروٹین ہوتا ہے جس میں جھلی ____ کہا جاتا ہے؟
A. Mitochondria
B. Stroma
C. Cytosol
D. Nucleus
Check answer and explanation
Answer: Stroma
Explanation Chloroplasts are double membrane-bound organelles found in plant cells and some algae, responsible for photosynthesis. The stroma is the semifluid protein-containing region within the chloroplast where light-dependent reactions occur.
A. Growth, reduction division and asexual reproduction
B. Growth, repair and semiconservative replication
C. Growth, reduction division and repair
D. Growth, repair and asexual reproduction
Check answer and explanation
Answer: Growth, repair and asexual reproduction
Explanation Mitosis is a type of cell division that involves the replication of a cell's DNA and the division of the cell into two daughter cells . It is essential for: Growth : Mitosis allows an organism to grow and develop by increasing the number of cells. Repair : Mitosis helps replace damaged or dead cells with new ones. Asexual reproduction : Mitosis enables asexual reproduction , where an organism produces offspring that are genetically identical to the parent.
Explanation The rate of evaporation can be increased by: Decreasing atmospheric pressure Increasing temperature Decreasing humidity Increasing the surface area of the liquid
ایک مواصلاتی سیٹلائٹ زمین کے گرد اپنا ایک چکر ______ گھنٹے میں مکمل کرتا ہے۔
A. 18
B. 6
C. 24
D. 12
Check answer and explanation
Answer: 24
Explanation A communication satellite in a geostationary orbit completes one revolution around the Earth in 24 hours. This is the same amount of time it takes the Earth to rotate once on its axis.
کینسر کی ایک قسم جو خون، بون میرو اور لمفیٹک نظام کو متاثر کرتی ہے؟
A. Lymphoma
B. Sarcoma
C. Leukemia
D. Carcinoma
Check answer and explanation
Answer: Leukemia
Explanation Leukemia is a type of cancer that affects the blood , bone marrow, and lymphatic system. It occurs when there is an abnormal growth of white blood cells , which can crowd out healthy cells and platelets.
Explanation Efficiency is the ratio of output to input , often expressed as a percentage. It represents how much of the input energy is actually converted into useful output energy, with the rest being lost as waste or heat. Key Points: Energy is the ability to do work. Work is the transfer of energy through a force applied over a distance. Power is the rate at which work is done or energy is transferred.