Chemical Reaction and Equations
NIOS · Class 10 · Science & Tech
Flashcards for Chemical Reaction and Equations — NIOS Class 10 Science & Tech. Quick Q&A cards covering key concepts, definitions, and formulas.
Interactive on Super Tutor
Studying Chemical Reaction and Equations? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for flashcards and more.
1,000+ Class 10 students started this chapter today
This is just one of 16+ visuals inside Super Tutor's Chemical Reaction and Equations chapter
Explore the full setWhat is a chemical equation?
Answer
A chemical equation is a shorthand description of a chemical reaction. Reactants are written on the left, products on the right, and an arrow shows the change. A plus sign is used when there is more t…
Why must a chemical equation be balanced?
Answer
A chemical equation must be balanced because the number of atoms of each element must be equal on both sides, following the law of conservation of mass. A balanced equation also helps in calculating q…
What is the balanced equation for magnesium burning in oxygen?
Answer
Balanced equation: 2Mg + O2 -> 2MgO. Magnesium combines with oxygen to form magnesium oxide. This is a combination reaction.
Why is Mg + O2 -> MgO called a skeletal equation?
Answer
It is a skeletal chemical equation because the number of atoms is not equal on both sides. It is not balanced. The correct balanced form is 2Mg + O2 -> 2MgO.
How does the hit and trial method balance an equation?
Answer
The equation is balanced by placing suitable coefficients before formulas without changing subscripts. The simplest whole numbers are used until the number of atoms of each element becomes equal on bo…
What precaution must be taken while balancing chemical equations?
Answer
Subscripts in the formulae must not be changed. Only coefficients may be changed. Changing a subscript changes the identity of the substance, such as turning NO2 into N2O4.
What is the balanced equation for zinc reacting with dilute sulphuric acid?
Answer
Balanced equation: Zn + H2SO4 -> ZnSO4 + H2. Zinc sulphate and hydrogen gas are formed. This equation is already balanced.
What happens when iron is heated with steam?
Answer
Balanced equation: 3Fe + 4H2O -> Fe3O4 + 4H2. Iron reacts with steam to form magnetic oxide of iron and hydrogen gas.
+28 more flashcards available
Practice AllFrequently Asked Questions
What are the important topics in Chemical Reaction and Equations for NIOS Class 10 Science & Tech?
How to score full marks in Chemical Reaction and Equations — NIOS Class 10 Science & Tech?
How many flashcards are available for Chemical Reaction and Equations?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Chemical Reaction and Equations
Practice Quiz
Test yourself with a quick quiz
Important Questions
Practice with board exam-style questions
Revision Notes
Key points for last-minute revision
Formula Sheet
All formulas in one place
Chapter Summary
Understand the chapter at a glance
Concept Maps
See how topics connect visually
Study Plan
Step-by-step plan to ace this chapter
Syllabus
What topics to cover
NCERT Solutions
Every textbook question solved step by step
For serious students
Get the full Chemical Reaction and Equations chapter — for free.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for NIOS Class 10 Science & Tech.