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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Answer: 98.8%
Explanation Carbon-12 (C-12) is the most abundant of the two stable isotopes of carbon, amounting to 98.93% of elemental carbon on Earth. Carbon-12 is composed of six protons , six neutrons, and six electrons. The atomic mass of carbon-12 is exactly 12 Dalton's, by definition.
گرام میں ظاہر کردہ عنصر کا جوہری وزن ______ ہے؟
Answer: Gram atomic mass
Explanation Gram atomic mass (GAM) is the atomic mass of an element expressed in grams. It represents the mass of one mole of atoms of that element.
آئنک یا ہم آہنگی بانڈ سے انٹرمولیکولر قوتوں کی طاقت _______ ہے؟
Answer: Weaker
Explanation Intermolecular forces are weaker than ionic or covalent bonds. Intermolecular forces are the attractive forces between molecules. While ionic and covalent bonds are the forces that hold atoms together within a molecule.
مکھن حل _____ کی مثال ہے؟
Answer: Liquid-solid
Explanation Butter is a mixture of solid fat particles (solute) dissolved in liquid oil (solvent), making it a solid-liquid solution. This type of solution is also known as a sol or a gel.
مندرجہ ذیل میں سے کون سا مدت کے ساتھ کم ہوتا ہے؟
Answer: Atomic Radius
Explanation Atomic radius decreases along a period as you move from left to right. This is because the number of protons in the nucleus increases, which pulls the electrons closer to the nucleus, resulting in a smaller atomic radius.
الیکٹران کے باہمی اشتراک سے بننے والا بانڈ ______ ہے؟
Answer: Covalent bond
Explanation A covalent bond is a chemical bond formed by the mutual sharing of electrons between two atoms. This type of bond typically occurs between nonmetal atoms , such as in molecules and organic compounds.
Answer: Gain of electrons
Explanation A non-metal atom forms an anion (a negatively charged ion) by gaining one or more electrons. This means that the atom acquires additional electrons to form a negative ion.
مندرجہ ذیل میں سے کون سا ہومو ایٹم ہے؟
Answer: H2
Explanation H2 is only a homo atomic [homo: same] molecule. Rest three are hetero atomic [hetero: different] molecules).
جب سیر شدہ محلول کو پتلا کیا جاتا ہے، تو یہ ____ میں بدل جاتا ہے؟
Answer: Unsaturated solution
Explanation When a saturated solution is diluted, the concentration of the solute decreases, and the solution becomes unsaturated. This means that the solution can still dissolve more solute than it currently contains.
موسلی کے مطابق عناصر کی کیمیائی خصوصیات ان کے متواتر فعل ہیں؟
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.
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