Practise Chemistry Class 10th MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Study Chemistry Class 10th MCQs through multiple-choice questions in General Science. This subtopic contains 76 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these Chemistry Class 10th 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: Both b and c
Explanation According to the Bronsted-Lowry theory , NH3 acts as a base because it can accept a proton (H^+). According to the Lewis theory, NH3 is a base because it can donate a pair of electrons.
اسٹراٹاسفیئر پر اونچائی ______ ہے؟
Answer: 50 to 55 km
Explanation The bottom of the stratosphere is around 10 km (6.2 miles or about 33,000 feet) above the ground at middle latitudes. The top of the stratosphere occurs at an altitude of 50 km (31 miles).
کاربوہائیڈریٹس جن میں الڈیہائیڈ گروپ ہوتا ہے انہیں _____ کہا جاتا ہے؟
Answer: Aldoses
Explanation Aldoses are carbohydrates that contain an aldehyde group (-CHO) in their molecular structure. The aldehyde group is a functional group that contains a carbon-oxygen double bond and a hydrogen atom. Examples of aldoses include glucose, galactose, and ribose.
جسمانی خصوصیات کی پیمائش کے لیے استعمال ہونے والے جسمانی طریقوں کو ____ کہتے ہیں؟
Answer: Gravimetric analysis method
Explanation The physical methods used to measure physical properties are called Gravimetric analysis methods. This technique involves measuring the mass of a substance to determine its concentration or quantity.
نظام توازن میں مستحکم ہے جب ______؟
Answer: Qc = Kc
Explanation When the reaction quotient (Qc) is equal to the equilibrium constant (Kc), the system is at equilibrium and is stable. Qc = Kc indicates that the rates of forward and reverse reactions are equal, and the concentrations of reactants and products remain constant.
وہ مادہ جو تیزاب اور بیس دونوں کے ساتھ رد عمل ظاہر کرتے ہیں ___ کہلاتے ہیں؟
Answer: Amphoteric substances
Explanation Amphoteric substances are those that can react with both acids and bases. They can donate or accept protons (H+ ions), depending on the conditions. Examples of amphoteric substances include water (H2O), amino acids, and certain metals like zinc and aluminum.
ایک ایسا مادہ جو کوآرڈینیٹ کوولینٹ بانڈ بنانے کے لیے الیکٹران کا ایک جوڑا عطیہ کر سکتا ہے؟
Answer: Lewis base
Explanation A Lewis base is a substance that donates a pair of electrons to form a coordinate covalent bond. This means that a Lewis base is an electron pair donor.
مندرجہ ذیل میں سے کون سا آرہینیئس ایسڈ نہیں ہے؟
Answer: CO2
Explanation According to the Arrhenius definition , an acid is a substance that increases the H+ ion concentration in aqueous solution. HCl, HNO3, and H2SO4 all dissociate in water to produce H+ ions, making them Arrhenius acids. CO2 does not dissociate in water to produce H+ ions.
Answer: Carboxylic acids
Explanation The functional group -COOH is the carboxyl group, which is a characteristic functional group of carboxylic acids. Carboxylic acids are a class of organic compounds that contain this group, examples include: Formic acid (HCOOH) Acetic acid (CH3COOH) Citric acid (C6H8O7)
Answer: DNA
Explanation DNA (Deoxyribonucleic acid) is the primary molecule that encodes genetic information in cells. It is a long, double-stranded helix made up of nucleotides, which are the building blocks of genetic information.
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