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.
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.
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مندرجہ ذیل میں سے کون سا کم کرنے والا ایجنٹ ہے؟
Answer: Al
Explanation Aluminum (Al) is a metal that can easily lose electrons to form ions, making it a reducing agent. As a reducing agent, aluminum can donate electrons to other substances, causing them to be reduced.
تمام منتقلی عناصر _____ ہیں؟
Answer: Metals
Explanation Transition elements , also known as transition metals , are a group of elements in the d-block of the periodic table. They are characterized by their ability to form ions with different charges. They are often found in the middle of the periodic table.
الیکٹران کے جوڑے جو ایٹموں میں مشترک نہیں ہوتے وہ _____ کہلاتے ہیں؟
Answer: Lone pairs
Explanation Lone pairs are electron pairs that are not shared by atoms in a covalent bond. They are pairs of electrons that are localized on a single atom and are not involved in bonding. Lone pairs are also known as non-bonding pairs or free pairs.
نقطہ انجماد کا انحصار ______ پر ہے؟
Answer: Pressure
Explanation The freezing point of a liquid can be affected by pressure. This is known as the " pressure melting point " effect. As pressure increases , the freezing point of a liquid can also increase.
کیمسٹری کی وہ شاخ جو ہائیڈرو کاربان ______ سے متعلق ہے؟
Answer: Organic chemistry
Explanation Organic chemistry is the branch of chemistry that deals with hydrocarbons and their derivatives. They are compounds containing carbon and hydrogen atoms. It may also contain other elements like oxygen, nitrogen, and sulfur.
ایک فیراڈے کی قیمت ______ کے برابر ہے؟
Answer: 96500 C
Explanation One Faraday (F) is equal to 96,500 Coulombs (C). The Faraday is a unit of electric charge. It represents the amount of charge required to deposit one mole of electrons ( 6.022 x 10^23 electrons ) at an electrode.
Answer: 6 Cl^- ions
Explanation In a NaCl crystal lattice, each sodium (Na+) ion is surrounded by six chlorine (Cl-) ions, forming an octahedral geometry. This means that each Na+ ion is coordinated by six Cl- ions, and vice versa.
گروپ میں الیکٹران وابستگی کی قدریں اوپر سے نیچے تک کم ہوتی ہیں کیونکہ ______؟
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.
مندرجہ ذیل میں سے کون سا آکسائڈائزنگ ایجنٹ کے طور پر کام کرتا ہے؟
Answer: Cl
Explanation Chlorine (Cl) is a strong oxidizing agent. It means it can accept electrons from other substances and cause them to be oxidized.
Answer: 1.4M
Explanation To calculate the molarity, we need to calculate the number of moles of sodium chloride (NaCl) dissolved in 500 cm³ (or 0.5 L) of solution. Molar mass of NaCl = 58.44 g/mol Number of moles = mass / molar mass = 40 g / 58.44 g/mol ≈ 0.684 mol Molarity = number of moles / volume (in liters) = 0.684 mol / 0.5 L ≈ 1.368 M Rounded to one decimal place , this is approximately 1.4M.
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