Class 10th Science: Chemical Reactions and Equations Quiz

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Questions and Answers

कार्बन और हाइड्रोजन के बीच किस प्रकार का अभिक्रिया होता है?

जोड़न अभिक्रिया = माल्टीप्लायर अभिक्रिया विघटन अभिक्रिया = सेल्फ-डिस्प्लेसमेंट अभिक्रिया सिंगल डिसप्लेसमेंट अभिक्रिया = डबल डिसप्लेसमेंट अभिक्रिया कॉम्बिनेशन अभिक्रिया = संलग्नक अभिक्रिया

हाइड्रोक्लोरिक एसिड (HCl) की सूत्ररूप से हाइड्रोजन (H2) और क्लोरीन (Cl2) के उत्पादन को कौन-से प्रकार के अभिक्रिया में समेत कर सकते हैं?

संलग्नक अभिक्रिया = माल्टीप्लायर अभिक्रिया सेल्फ-डिस्प्लेसमेंट अभिक्रिया = संलंकन विघातन अभिक्रिया संलंकन विघातन अभिक्रिया = कॉम्बीनेशन अभिक्रिया संलंकन मुकाबला अभिक्रिया = संलंकन मुकाबला अभि...

हाइड्रोक्लोरीक एसी...?

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मिलान क्रिया किस प्रकार की होती है?

एकीकरण = एक नये पदार्थ का गठन विघटन = पदार्थों को सरल रूपों में विभाजित करना Signup and view all the answers

संश्लेषण क्रिया किस सम्मेलन में आती है?

एकीकरण = एक नये पदार्थ का गठन पृथकरण = पदार्थों को सरल रूपों में विभाजित करना Signup and view all the answers

समलेषण (Single displacement) क्रिया में क्या होता है?

पुनर्स्थापन = प्रतिस्थापन संलिप्ति = समलेषण Signup and view all the answers

समलेषण (Double displacement) क्रिया में क्या होता है?

पुनर्स्थापन = प्रतिस्थापन संलिप्ति = समलेषण Signup and view all the answers

समकृत समीकरण में कौन-सी बात सही है?

एकी समीकरण में प्रत्येक तत्व के अति संख्या इकाई होती है = हाँ गैसों के लिए, समीकरण के प्रति-प्रति पक्ष पर एक तीर (→) होता है = नहीं Signup and view all the answers

समरूप समीकरण में कौन-सी बात सही है?

समीकरण में प्रति-प्रति पक्ष पर समान प्रकार के प्रति-प्रति अणु होते हैं = हाँ हल-तरल और ठोस के लिए, कोई तीर आवश्यक नहीं है = हाँ Signup and view all the answers

Study Notes

Class 10th Science: Chemical Reactions and Equations

In Class 10 Science, learning about chemical reactions and equations is a fundamental part of understanding the world around us. Chemical reactions are processes that lead to the formation of new substances or the transformation of existing substances. The study of these reactions, along with their corresponding equations, helps us understand the principles that govern the behavior of matter.

Chemical Reactions

Chemical reactions are classified into two main types: synthesis (formation of new substances) and decomposition (breaking down of substances into simpler forms). These reactions can be further categorized as combination, decomposition, single displacement (replacement), and double displacement (metathesis) reactions.

Equations

Chemical equations represent reactions mathematically, illustrating the conservation of mass and balanced participation of reactants and products. Balanced equations have the same number of atoms of each element on both sides of the equation.

Balanced equations follow the following rules:

The same number of atoms of each element appears on both sides of the equation.
The coefficients (numbers in front of the formulas) are used to balance the number of atoms.
For gases, the sides of the equation are separated by an arrow (→).
For solids and liquids, no arrow is needed.

Common Types of Chemical Reactions

Combination Reactions

In combination reactions, two or more simple substances combine to form a single product. The reaction between iron (Fe) and sulfur (S) to form iron sulfide (FeS) is an example of a combination reaction.

Fe (s) + S (s) → FeS (s)

Decomposition Reactions

In decomposition reactions, a single substance decomposes to form two or more simpler substances. The decomposition of water (H2O) into hydrogen (H2) and oxygen (O2) gases is an example of a decomposition reaction.

2 H2O (l) → 2 H2 (g) + O2 (g)

Single Displacement Reactions

In single displacement reactions, one atom of an element replaces another atom of a different element in a compound, resulting in the formation of two new compounds. The reaction between zinc (Zn) and copper sulfate (CuSO4) to form zinc sulfate (ZnSO4) and copper (Cu) is an example of a single displacement reaction.

Zn (s) + CuSO4 (aq) → ZnSO4 (aq) + Cu (s)

Double Displacement Reactions

In double displacement reactions, two ions in solution exchange places, forming two new compounds. The precipitation of solid silver chloride (AgCl) when silver nitrate (AgNO3) and sodium chloride (NaCl) dissolve in water is an example of a double displacement reaction.

AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq)

Important Questions

What is a chemical reaction?
What are the two main types of chemical reactions?
How do chemical equations represent chemical reactions mathematically?
What are the rules for writing balanced chemical equations?
What are combination reactions and how do they differ from synthesis reactions?
What are decomposition reactions and how do they differ from degradation reactions?
What are single displacement reactions and how do they differ from double displacement reactions?
What is the distinguishing feature of a double displacement reaction?
Why are balanced chemical equations important in understanding chemical processes?
How can you determine the number of moles of a substance in a reaction from its balanced equation?

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Description

Test your knowledge of chemical reactions and equations from Class 10 Science curriculum. Learn about different types of reactions like combination, decomposition, single displacement, and double displacement reactions, along with the rules for balancing chemical equations.