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.
فعال سائٹ مسلسل اپنی شکل بدلتی رہتی ہے جب تک کہ سبسٹریٹ اس سے منسلک نہ ہو جائے، یہ ______ کا بیان ہے؟
A. Both A and B
B. Induce fit model
C. Fluid mosaic model
D. Lock and key model
Check answer and explanation
Answer: Induce fit model
Explanation The induced fit model proposes that the active site of an enzyme is flexible and changes shape until the substrate binds, much like a glove molding to fit a hand. This model suggests that the enzyme adapts to the substrate, rather than the substrate simply fitting into a pre-existing lock.
Explanation Rana tigrina, also known as the Asian giant toad or the Indian bullfrog. It is a species of frog found in Southeast Asia and the Indian subcontinent.
Explanation Analogous structures are features that have a similar function but different origins and structures, and are not considered in classification.
دوران خون کی ایک قسم جو ٹشوز کے درمیان خالی جگہوں سے گزرتی ہے؟
A. Pulmonary circulatory system
B. All of these
C. Open type circulatory system
D. Close type circulatory system
Check answer and explanation
Answer: Open type circulatory system
Explanation In an open circulatory system , blood bathes the tissues directly, flowing through spaces among tissues , such as sinuses or lacunae . This type of circulation is found in: Invertebrates like insects, mollusks, and crustaceans Some lower vertebrates like fish and amphibians
اگر-تو بیان پر مبنی سائنسی استدلال کو _____ کہا جاتا ہے؟
A. Scientific reasoning
B. None
C. Inductive reasoning
D. Deductive reasoning
Check answer and explanation
Answer: Deductive reasoning
Explanation Deductive reasoning is a type of logical reasoning that uses "if-then" statements to arrive at a conclusion. It involves making a logical deduction based on a premise. It is used in scientific reasoning to test hypotheses and predict outcomes.
ایٹم میں پروٹان اور نیوٹران کی تعداد ________ حاصل کرنے کے لیے شامل کی جاتی ہے؟
A. In an atom number of protons and neutrons are added to obtain ________? Number of electrons
B. Number of nucleons
C. Atomic number of element
D. Number of isotopes
Check answer and explanation
Answer: Number of nucleons
Explanation The number of protons and neutrons in an atom are added together to obtain the total number of nucleons. It is also known as the mass number.
گیسوں کی کثافت اس وقت بڑھتی ہے جب اس کا ______ ہے؟
A. Temperature increased
B. None of these
C. Pressure increased
D. Volume increased
Check answer and explanation
Answer: Pressure increased
Explanation When the pressure on a gas increases , the molecules are forced closer together, resulting in a higher density. This is because the volume of the gas decreases as the pressure increases, causing the molecules to be more concentrated.
Explanation Momentum is the quantity of motion contained in a body. It is defined as the product of an object's mass and velocity . Momentum is a vector quantity and is typically represented by the symbol "p".
زمین کا وہ حصہ جہاں زندگی موجود ہے ______ کہلاتا ہے؟
A. Biosphere
B. Atmosphere
C. Lithosphere
D. Hydrosphere
Check answer and explanation
Answer: Biosphere
Explanation The biosphere is the region of the Earth where life exists , including the land, oceans, and atmosphere. It encompasses all living organisms, from the tiniest microbe to the mightiest tree. Includes the interactions between living things and their environment.
گروپ میں الیکٹران وابستگی کی قدریں اوپر سے نیچے تک کم ہوتی ہیں کیونکہ ______؟
A. Atomic size increases
B. Atomic size normal
C. Atomic size same
D. Atomic size decreases
Check answer and explanation
Answer: Atomic size increases
Explanation As you move down a group in the periodic table , the atomic size increases. This means that the outermost electrons are farther away from the nucleus, making it easier for the atom to gain an extra electron. As a result, the electron affinity decreases down a group.
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