Class 10 Science Chapter-wise Important Questions with Answers (2025 Board Exam)

Introduction:

Class 10 Science ek scoring subject hai agar aap smart way me tayari karein. Is post me humne har chapter ke 3–5 important questions diye hain jo 2025 ke board exam ke liye kaafi helpful honge. Saath hi, short and precise answers bhi diye gaye hain.

Chapter 1: Chemical Reactions and Equations

Q1. Define a balanced chemical equation with one example.
Ans: A balanced equation has equal number of atoms of each element on both sides.
Example:
Zn + H2SO4 → ZnSO4 + H2

Q2. What is a displacement reaction? Give one example.
Ans: When a more reactive element displaces a less reactive element from its salt solution.
Example:
Fe + CuSO4 → FeSO4 + Cu

Chapter 2: Acids, Bases and Salts

Q1. What is the chemical formula of baking soda?
Ans: NaHCO3 (Sodium Bicarbonate)

Q2. What is the pH value of a neutral solution?
Ans: pH = 7

Chapter 6: Life Processes

Q1. What is the function of hydrochloric acid in the stomach?
Ans: It kills bacteria and helps in the digestion of proteins by activating pepsin.

Q2. Name the organs of the human excretory system.
Ans: Kidneys, ureters, urinary bladder, urethra.

Chapter 10: Light – Reflection and Refraction

Q1. Define the principal focus of a concave mirror.
Ans: It is the point on the principal axis where light rays parallel to the axis converge after reflection.

Q2. State the mirror formula.
Ans: 1/f = 1/v - 1/u

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Conclusion:
Yeh important questions aapki board exam preparation ko boost karenge. Agar aap kisi chapter ka aur detailed notes chahte hain, to niche comment karein ya hamare dusre posts dekhein.