CHEMISTRY CLASS 10TH MCQS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
جس نظام کے لیے توازن مستقل ہے، کے سی میں ارتکاز کی اکائیاں ہیں۔
N2(g) + 3H2(g) ⇌ 2NH3(g)
N2(g) + 02(g) ⇌ 2NO
H2(g) +12(g) ⇌ 2HI(g)
CO2(g) + H3(g) ⇌ CO + H2O(l)
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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)
جب کے سی کی شدت چھوٹی ہے تو ______ کی طرف اشارہ کرتا ہے؟
Reaction mixture contain most of the reactant
Reaction mixture contain most of the product
Reaction mixture contain almost equal amount of reactant and product
Reaction goes to completion
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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.
ایک ردعمل جو کبھی مکمل نہیں ہوتا ہے اسے ریورسبل ردعمل کہا جاتا ہے۔ الٹ جانے والا ردعمل ______ سے ظاہر ہوتا ہے؟
Doted lines
Single arrow
Double arrow
Double straight line
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Explanation
A reversible reaction is a reaction that can proceed in both the forward and reverse directions, and never goes to completion.
It is represented by a double arrow (⇌) between the reactants and products.
For example: A + B ⇌ C + D
Key Point:
Single arrow (→) : Represents an irreversible reaction, where the reaction only proceeds in one direction.
مندرجہ ذیل میں سے کون سا بیان متحرک توازن کے بارے میں غلط ہے؟
It takes place in a close container
Concentration of reactant and products are not changed
Rate of forward reaction is equal to rate of reverse reaction
Equilibrium cannot be disturbed by any external stress
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Explanation
Dynamic equilibrium is a state where the rates of forward and reverse reactions are equal, and the concentrations of reactants and products remain constant.
However, this equilibrium can be disturbed by external stresses such as:
Changes in concentration Changes in temperature Changes in pressure Adding or removing reactants or products
کیمسٹری کی وہ شاخ جو ہائیڈرو کاربان ______ سے متعلق ہے؟
Industrial chemistry
Inorganic chemistry
Organic chemistry
Physical chemistry
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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.
وہ ردعمل جس میں ایک تیزاب اور ایک بنیاد کا رد عمل صرف نمک اور پانی بنتا ہے اسے _______ ردعمل کہا جاتا ہے۔
Neutralization
Ionization
Oxidation
Decomposition
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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)
