BASICS OF EVERY DAY SCIENCE EDS
Basics of Every Day Science EDS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
ترکیب رد عمل کی ایک مثال کیا ہے؟
Water decomposing into Hydrogen and Oxygen
Carbon combining with Oxygen to form Carbon Monoxide
Nitrogen and Oxygen combining to form Nitrogen Dioxide
Hydrogen and Oxygen combining to form water
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Explanation
Hydrogen and Oxygen combining to form water , which is an example of a synthesis reaction: 2H2 + O2 → 2H2OIn this reaction, two substances ( hydrogen and oxygen) combine to form a new compound (water).
مندرجہ ذیل میں سے کون سی مساوات اضافی ردعمل کی نمائندگی کرتی ہے؟
AB → A+B
A → AB
A+B → AB
AB → A+C
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Explanation
The equation A+B → AB represents an addition reaction, where two substances (A and B) combine to form a new compound (AB).
Combination Reaction
Decomposition Reaction
Neutralization Reaction
None
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Explanation
The given reaction, CaO + CO2 → CaCO2 , is an example of a Combination Reaction, also known as a Synthesis Reaction or Addition Reaction. In this reaction, two substances , calcium oxide (CaO) and carbon dioxide (CO2), combine to form a single compound, calcium carbonate (CaCO2).
اضافی ردعمل کو ____ کے نام سے بھی جانا جاتا ہے؟
Combination Reaction
Synthesis Reaction
Decomposition Reaction
Both A and B
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Explanation
An Addition Reaction is also known as both a Combination Reaction and a Synthesis Reaction. All three terms refer to a chemical reaction where two or more substances combine to form a new, single compound.
کیمیائی رد عمل کے دوران ری ایکٹنٹس اور مصنوعات کا کل ماس محفوظ رہے گا، اس بیان کو _____ کہا جاتا ہے؟
Law of definite proportions
Law of conservation of mass
Law of multiple proportions
Law of reciprocal proportions
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Explanation
The statement "Total mass of the reactants and products will remain conserved during a chemical reaction" is called the Law of Conservation of Mass.
Methane and Oxygen
Carbon dioxide and Water
Hydrogen and Oxygen
Carbon and Water
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Explanation
The products in the reaction are Carbon dioxide (CO2) and Water (H2O). These products are formed through the combustion of Methane (CH4) and Oxygen (O2), releasing energy in the process.
Methane and Oxygen
Carbon dioxide and Water
Hydrogen and Oxygen
Carbon and Water
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Explanation
The reactants in the reaction are Methane (CH4) and Oxygen (O2). These two substances combine to form the products Carbon Dioxide (CO2) and Water (H2O), releasing energy in the process.
کیمیائی تبدیلی کو _____ کہا جاتا ہے؟
Physical Change
Phase Transition
Chemical Interaction
Chemical Reaction
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Explanation
A chemical reaction is a process in which one or more substances are converted into new substances, often with a change in chemical composition and properties. Chemical reactions involve the breaking and forming of chemical bonds, resulting in a transformation of the original substances.
مندرجہ ذیل میں سے کون سی کیمیائی رد عمل کی مثال ہے؟
Water freezing into ice
Sand settling to the bottom of a pool
Leaves changing colors in the fall
A rock rolling down a hill
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Explanation
Leaves changing colors in the fall is an example of a chemical reaction. During this process , the production of chlorophyll (the green pigment) slows down, and the production of other pigments.Like carotenoids and anthocyanins increases, causing the leaves to change color.
کون سا بہترین اشارہ ہے کہ کیمیائی رد عمل ہوا ہے؟
Blue powder turns water blue
Metal budding when placed in an unknown liquid
A white substance dissolving in water
None
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Explanation
When a metal bubbles when placed in an unknown liquid , it indicates that a chemical reaction has taken place. Bubbling is often a result of a gas being released during a reaction. In this case, the metal is reacting with the unknown liquid to produce gas, causing the bubbling effect. This is a clear indication that a chemical reaction has occurred.
