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.
Explanation The sun is the ultimate source of energy for our planet , providing energy through solar radiation. This energy is then converted into various forms , such as: Thermal energy (heat) Kinetic energy (wind, water currents) Electrical energy (generated from solar panels) Chemical energy (fossil fuels, biomass) Biological energy (food chains, ecosystems)
Explanation A diatomic molecule is a molecule composed of two atoms , either of the same element (homogeneous) or different elements (heterogeneous). Examples of diatomic molecules include: Hydrogen (H2) Oxygen (O2) Nitrogen (N2)
بانڈ جس میں 3 مشترکہ الیکٹران کے جوڑے شامل ہیں ایک ______ ہے؟
A. Double covalent bond
B. Single covalent bond
C. None of above
D. Triple covalent bond
Check answer and explanation
Answer: Triple covalent bond
Explanation A triple covalent bond is a chemical bond that involves the sharing of three pairs of electrons between two atoms. This type of bond is typically found in molecules where three pairs of electrons are shared, resulting in a strong and stable bond.
فطرت کی یکساں یا مستقل حقیقت، عملی طور پر ایک ناقابل تردید نظریہ _____ ہے؟
A. Scientific theory
B. Scientific reasoning
C. Scientific law
D. Scientific hypothesis
Check answer and explanation
Answer: Scientific law
Explanation A scientific law is a statement that describes a consistent and universal pattern of natural behavior. It is often considered an irrefutable theory. Examples of scientific laws include the Law of Gravity, the Laws of Motion, and the Law of Conservation of Energy.
Explanation The spring constant (k) represents the force required to stretch or compress a spring by a certain distance. The unit of spring constant is Newton per meter (N/m) or Newton per meter^-1 (Nm^-1).
Explanation Limiting frictional force (also known as static friction) is greater than: Rolling friction ( because rolling friction is much smaller , as it only opposes the motion of an object that is already rolling) Sliding friction ( which is another term for kinetic friction ) Kinetic friction (which is the frictional force that acts when an object is already moving )
پٹھوں کے سنکچن اور نرمی کی تال کی حرکت کی لہر کو ____ کہا جاتا ہے؟
A. Absorption
B. Digestion
C. Peristalsis
D. Defection
Check answer and explanation
Answer: Peristalsis
Explanation Peristalsis is a wave of rhythmic movements of muscle contraction and relaxation that helps move substances through a tubular structure , like the digestive tract. It's a vital process that facilitates the transport of food, water, and waste products through the digestive system.
موسلی کے مطابق عناصر کی کیمیائی خصوصیات ان کے متواتر فعل ہیں؟
A. Atomic Radius
B. Atomic Number
C. Atomic Size
D. Atomic Mass
Check answer and explanation
Answer: Atomic Number
Explanation Henry Moseley's famous work in 1913 showed that the chemical properties of elements are a periodic function of their atomic number (Z) , not their atomic mass. This discovery led to the modern periodic table , where elements are arranged in order of increasing atomic number (Z), rather than atomic mass.
تحقیق کا میدان جو حیاتیاتی نظام کی ریاضیاتی نمائندگیوں کی جانچ کرتا ہے جسے _____ کہا جاتا ہے؟
A. Proportion
B. Mathematical biology
C. Ratio
D. Law
Check answer and explanation
Answer: Mathematical biology
Explanation Mathematical biology , also known as biomathematics. It is an interdisciplinary field that applies mathematical techniques and tools to understand and analyze biological systems, processes, and phenomena. It involves developing mathematical models , simulations, and algorithms to describe and predict biological behavior, dynamics, and evolution.
جڑوں کے بال لمبے، پتلے اور نلی نما ہوتے ہیں، یہ سطح کے رقبے کو بڑھاتے ہیں جس سے _____؟
A. Rate of growth
B. Rate of absorption of water
C. Rate of respiration
D. Rate of photosynthesis
Check answer and explanation
Answer: Rate of absorption of water
Explanation Root hairs are long, thin, and tubular structures that increase the surface area of the root. It allowing for a greater rate of absorption of water and minerals from the soil.
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