Chemistry Class 9th MCQs MCQs - General Science Practice | PakExamPoint
Practise Chemistry Class 9th MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Chemistry Class 9th MCQs MCQs and revision practice
Study Chemistry Class 9th MCQs through multiple-choice questions in General Science. This subtopic contains 95 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these Chemistry Class 9th 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 Ionic crystals are typically characterized by high melting points due to the strong electrostatic forces between the positively and negatively charged ions. The attractive forces between oppositely charged ions are strong, requiring a significant amount of energy to overcome , resulting in high melting points.
مندرجہ ذیل میں سے کس کو جسمانی ذرائع سے الگ کیا جا سکتا ہے؟
A. Mixture
B. Compound
C. Element
D. Substance
Check answer and explanation
Answer: Mixture
Explanation A mixture is a physical combination of two or more substances that can be separated by physical means, such as: Filtration Sedimentation Decantation Distillation Chromatography
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)
Explanation Noble gases are stable because their outermost energy level is full, meaning they have eight electrons in their valence shell. This full outer energy level gives them a stable electronic configuration, similar to that of the noble gases, and makes them unreactive.
اٹھارہ سو انہتر میں منڈیلیف نے _____ کے بارے میں اپنا متواتر قانون پیش کیا؟
A. Atomic Number
B. Atomic Mass
C. Chemical properties
D. Physical properties
Check answer and explanation
Answer: Atomic Mass
Explanation In 1869, Dmitri Mendeleev proposed his periodic law , which states: "When the elements are arranged in order of increasing atomic mass , certain sets of properties recur periodically ." This law allowed him to create the first periodic table , where elements were arranged in a logical order based on their atomic masses and chemical properties.
مندرجہ ذیل میں سے کون سی مادے کی سب سے ہلکی شکل ہیں؟
A. Gases
B. Liquid
C. Plasma
D. Solid
Check answer and explanation
Answer: Plasma
Explanation Plasma is a state of matter where atoms or molecules are ionized, meaning they have lost or gained electrons , resulting in a collection of charged particles. Plasma is often referred to as the fourth state of matter. It is the lightest form of matter , as the particles are highly energetic and widely spaced.
مندرجہ ذیل میں سے کون سا نقطہ ابلتے کو متاثر نہیں کرتا؟
A. Initial temperature of liquid
B. External pressure
C. Intermolecular forces
D. Nature of liquid
Check answer and explanation
Answer: Initial temperature of liquid
Explanation The initial temperature of a liquid does not affect its boiling point. The boiling point is the temperature at which a liquid changes state to a gas at a given pressure. It is a physical property of the substance itself.
الیکٹران کے مشترکہ جوڑے کو اپنی طرف متوجہ کرنے کی صلاحیت کو ______ کہا جاتا ہے؟
A. Electron Affinity
B. Ionization Energy
C. Shielding Effect
D. Electronegativity
Check answer and explanation
Answer: Electronegativity
Explanation Electronegativity is the ability of an atom to attract a shared pair of electrons in a covalent bond. It measures the ability of an atom to pull electrons towards itself.
طبی آلات کی جراثیم کشی کے لیے کون سی شعاعیں استعمال ہوتی ہیں؟
A. α-rays
B. γ-rays
C. β-rays
D. x-rays
Check answer and explanation
Answer: γ-rays
Explanation Gamma rays are commonly used for sterilization of medical instruments. Because of their high energy and penetrating power , which allows them to effectively kill bacteria and other microorganisms. Gamma radiation is also used to sterilize medical supplies. Such as syringes, gloves, and implantable devices.
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