Chemistry Class 10th MCQs MCQs - General Science Practice | PakExamPoint
Practise Chemistry Class 10th MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Chemistry Class 10th MCQs MCQs and revision practice
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.
کیمسٹری کی وہ شاخ جو ہائیڈرو کاربان ______ سے متعلق ہے؟
A. Physical chemistry
B. Inorganic chemistry
C. Industrial chemistry
D. Organic chemistry
Check answer and explanation
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.
Explanation Polyethene , also known as polyethylene , is a type of plastic. It is a thermoplastic polymer made from ethylene monomers. It is commonly used in packaging, plastic bags, and containers.
Explanation Water (H₂O) is a polar solvent due to its asymmetrical molecular structure. It results in a slightly positive charge on the hydrogen atoms. A slightly negative charge on the oxygen atom.
عارضی سخت پانی بنانے کے لیے کون سے نمکیات ضرورت سے زیادہ تحلیل ہوتے ہیں؟
A. CaCO3 and Ca(OH)2
B. Ca(HCO3)2 and Mg(HCO3)2
C. CaSO4 and CaCl2
D. KNO3 and KOH
Check answer and explanation
Answer: Ca(HCO3)2 and Mg(HCO3)2
Explanation Temporary hard water is caused by the presence of dissolved calcium and magnesium bicarbonates (Ca(HCO3)2 and Mg(HCO3)2). These salts are commonly found in natural water sources and can enter the water supply through contact with limestone, dolomite, and other mineral deposits.
Explanation Starch is a polysaccharide , a long chain of glucose molecules linked together through glycosidic bonds. It is a complex carbohydrate that serves as a energy storage molecule in plants.
جب کے سی کی شدت چھوٹی ہے تو ______ کی طرف اشارہ کرتا ہے؟
A. Reaction mixture contain most of the reactant
B. Reaction goes to completion
C. Reaction mixture contain most of the product
D. Reaction mixture contain almost equal amount of reactant and product
Check answer and explanation
Answer: Reaction mixture contain most of the product
Explanation When the magnitude of Kc (equilibrium constant) is small , it indicates that the reaction mixture contains mostly reactants, and the forward reaction does not proceed very far.
Explanation The equilibrium constant, Kc, for the reaction: N2 + O2 ⇌ 2NO is unitless (No unit). Since the number of moles of gas is the same on both the reactant and product sides (2 moles). The concentration terms in the equilibrium constant expression cancel out, leaving Kc without units.
مندرجہ ذیل میں سے کون سا جیٹ ایندھن کے طور پر استعمال ہوتا ہے؟
A. Diesel oil
B. Petrol
C. Fuel oil
D. Kerosene oil
Check answer and explanation
Answer: Kerosene oil
Explanation Kerosene oil is used as jet fuel , commonly known as Jet-A or Jet-A1. It has a high energy density and good combustion properties suitable for aircraft engines.
وہ ردعمل جس میں ایک تیزاب اور ایک بنیاد کا رد عمل صرف نمک اور پانی بنتا ہے اسے _______ ردعمل کہا جاتا ہے۔
A. Neutralization
B. Oxidation
C. Ionization
D. Decomposition
Check answer and explanation
Answer: Neutralization
Explanation A Neutralization reaction is a specific type of reaction where an acid and a base react to form a salt and water only, with no other products. This reaction is characterized by the elimination of acidic and basic properties , resulting in a neutral solution. Example : HCl (acid) + NaOH (base) → NaCl (salt) + H2O (water)
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