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.
Explanation The stratosphere is the second layer of Earth's atmosphere as you go upwards, lying above the troposphere and below the mesosphere. The layers of the Earth's atmosphere , in order from the surface, are: Troposphere (up to about 12 km/7.5 miles) Stratosphere (up to about 50 km/31 miles) Mesosphere (up to about 85 km/53 miles) Thermosphere (up to about 600 km/373 miles)
یہ دیئے گئے جوہری، سالماتی یا آئنک کیمیکل کی حراستی یا مقدار کا اندازہ کرنے کے لیے استعمال کیا جاتا ہے؟
A. Spectroscopy
B. Chromatography
C. Conductometry
D. Potentiometry
Check answer and explanation
Answer: Spectroscopy
Explanation Spectroscopy is a analytical technique used to measure the interaction between matter and electromagnetic radiation, such as light. It is used to assess the concentration or amount of a given atomic, molecular, or ionic chemical species by measuring the absorption, emission, or scattering of light by the species.
جس نظام کے لیے توازن مستقل ہے، کے سی میں ارتکاز کی اکائیاں ہیں۔
A. CO2(g) + H3(g) ⇌ CO + H2O(l)
B. N2(g) + 3H2(g) ⇌ 2NH3(g)
C. H2(g) +12(g) ⇌ 2HI(g)
D. N2(g) + 02(g) ⇌ 2NO
Check answer and explanation
Answer: N2(g) + 3H2(g) ⇌ 2NH3(g)
Explanation The equilibrium constant, Kc, has units of concentration for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g) This reaction involves a change in the number of moles of gas on both the reactant and product sides, specifically: 4 moles (reactants) ⇌ 2 moles (products)
Explanation Aeroplanes fly in the troposphere , which is the lowest layer of the Earth's atmosphere, extending up to about 12 km (7.5 miles) above the Earth's surface. The troposphere is where weather occurs , and it's the layer where aircraft operate , typically cruising at altitudes between 30,000 to 40,000 feet (9,100 to 12,200 meters).
Explanation Harvesting is the most important step in the preparation of sugar from sugarcane or sugar beets. Sugarcane is typically harvested by hand or by machine, and sugar beets are harvested by machine. The quality of the harvest affects the quality of the sugar produced.
Explanation Abrasives are substances that wear away or remove material through friction or rubbing. Examples of abrasives include : Water insoluble minerals like : Silica (sand) Alumina (aluminum oxide) Calcium carbonate (limestone) Diamond
کو الگ کرنے کے لیے استعمال ہونے والی سینٹری فیوج مشین؟ ____
A. pH
B. Crystal
C. Juice
D. Mud
Check answer and explanation
Answer: Mud
Explanation A centrifuge is a machine that uses centrifugal force to separate particles of different densities or sizes from a mixture. It is commonly used to separate : Liquids from solids (e.g., mud, sludge) Heavy particles from lighter particles (e.g., sedimentation) Immiscible liquids (e.g., oil and water)
Explanation Surfactants reduce the surface tension of water , which is the energy required to create a surface between water and air. By reducing surface tension , surfactants make it easier for water to spread and penetrate surfaces , which is important for cleaning and other applications.
ایچ₂او کے مالیکیولز کے درمیان کس قسم کا بانڈ بنتا ہے؟
A. All of these
B. Hydrogen bond
C. Ionic bond
D. Covalent bond
Check answer and explanation
Answer: Covalent bond
Explanation Water molecules are held together by hydrogen bonds, It is a type of strong intermolecular force Where the slightly positive hydrogen of one molecule attracts the slightly negative oxygen of another, creating a "sticky" network that gives water unique properties like surface tension.
Explanation Glucose (C6H12O6) is a type of carbohydrate , specifically a simple sugar or monosaccharide. It is a vital source of energy for many living organisms, including humans. Glucose is a primary component of many carbohydrates, such as starch, cellulose, and glycogen.
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