Practise Chemistry Class 9th MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
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.
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کون سا محلول زیادہ پانی رکھتا ہے؟
Answer: 0.25M
Explanation The molarity (M) of a solution represents the number of moles of solute per liter of solution (not per liter of water). A lower molarity indicates a more dilute solution, which means it contains more water.
مائعات کی نقل و حرکت ______ سے کم ہے؟
Answer: Gases
Explanation Liquids have a lower mobility than gases. In a liquid, the molecules are close together and have a certain degree of attraction, which limits their ability to move freely. In contrast, gas molecules are widely spaced. It have little attraction, allowing them to move more freely and rapidly.
مندرجہ ذیل میں سے کون سا بیان درست ہے؟
Answer: Reduction occurs at cathode
Explanation In an electrochemical cell , reduction occurs at the cathode (positive electrode), where electrons are gained by the oxidized species , causing it to be reduced. Meanwhile, oxidation occurs at the anode (negative electrode), where electrons are lost by the reduced species , causing it to be oxidized.
سکرین کے اس مواد کا نام بتائیں جو رتھر فورڈ ایٹم ماڈل میں استعمال ہوتا ہے؟
Answer: Zinc sulphide
Explanation In Rutherford's famous experiment , known as the "Gold Foil Experiment" or " Rutherford's Scattering Experiment ", a thin layer of zinc sulphide (ZnS) was used as the screen to detect the scattered alpha particles. Zinc sulphide is a phosphor that emits light when struck by radiation, allowing Rutherford to visualize the trajectory of the alpha particles.
Answer: 6
Explanation Group VIA (also known as Group 16) elements have six electrons in their valence shell. Oxygen (O) is a member of this group, and its atomic number is 8. The electronic configuration of oxygen is 1s2 2s2 2p4, which shows that it has six electrons in its valence shell (two in the 2s orbital and four in the 2p orbitals).
Answer: Bell metal
Explanation An alloy of Cu - Sn is called Bell metal. Bell metal is a specific type of bronze with a higher tin content, commonly used for making bells.
الیکٹرانک کنفیگریشن _______ کی تقسیم ہے؟
Answer: Electron
Explanation Electronic configuration refers to the distribution of electrons within an atom or molecule. It shows how the electrons are arranged in different energy levels (shells) and sublevels (orbitals) around the nucleus.
جب دو ایک جیسے ایٹم الیکٹران کے جوڑے بانٹتے ہیں اور بانڈ کی شکل کے بجائے ایک دوسرے پر طاقت کا استعمال کرتے ہیں تو ______ ہے؟
Answer: Non-polar covalent bond
Explanation When two identical atoms share electron pairs and exert an equal force on each other, the bond formed is a non-polar covalent bond. This type of bond is characterized by a equal sharing of electrons, resulting in a balanced and symmetrical distribution of electrons.
وہ محلول جس میں ٹھوس محلول کو مائع سالوینٹ میں شامل کیا جاتا ہے ____ کہلاتا ہے؟
Answer: Solids in liquid
Explanation A solution that contains a solid solute dissolved in a liquid solvent is called a solid-in-liquid solution or a solute-solvent solution. This is the most common type of solution , where a solid substance (the solute) is dissolved in a liquid substance (the solvent).
ایتھل الکحل ______ کی طرف سے تیار کیا گیا تھا؟
Answer: Al-Razi
Explanation Ethyl alcohol was prepared by Al-Razi ( also known as Rhazes ). He was a Persian polymath who made significant contributions to chemistry and medicine, including the distillation of alcohol.
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