1. Matter in Our Surroundings

Description:

Get ready for your exams with a well-curated set of important questions from Chapter 1: Matter in Our Surroundings, based on the latest NCERT and CBSE 2024–25 syllabus.

This PDF includes one-mark to five-mark questions framed by subject experts to boost your understanding and scoring ability.

Free to download and perfect for quick revision.

What’s Inside This PDF?

✅ 1 Mark Questions – Definitions, fill in the blanks, and MCQs

✅ 2/3 Mark Questions – Short conceptual and reasoning-based answers

✅ 5 Mark Questions – Application-based and diagram-supported problems

✅ Covers all major topics: states of matter, change of state, latent heat, evaporation

✅ Ideal for class tests, half-yearly exams, and board exam preparation

What You Will Learn?

✅ Matter is made up of small particles. 

✅ The matter around us exists in three states—solid, liquid and gas. 

✅ The forces of attraction between the particles are maximum in solids, intermediate in liquids and minimum in gases. 

✅ The spaces in between the constituent particles and kinetic energy of the particles are minimum in the case of solids, intermediate in liquids and maximum in gases.

✅ The arrangement of particles is most ordered in the case of solids, in the case of liquids layers of particles can slip and slide over each other while for gases, there is no order, particles just move about randomly. 

✅ The states of matter are inter-convertible. The state of matter can be changed by changing temperature or pressure. 

✅ Sublimation is the change of solid state directly to gaseous state without going through liquid state. 

✅ Deposition is the change of gaseous state directly to solid state without going through liquid state. 

✅ Boiling is a bulk phenomenon. Particles from the bulk (whole) of the liquid change into vapour state. 

✅ Evaporation is a surface phenomenon. Particles from the surface gain enough energy to overcome the forces of attraction present in the liquid and change into the vapour state. 

✅ The rate of evaporation depends upon the surface area exposed to the atmosphere, the temperature, the humidity and the wind speed. 

✅ Evaporation causes cooling. 

✅ Latent heat of vaporisation is the heat energy required to change 1 kg of a liquid to gas at atmospheric pressure at its boiling point. 

✅ Latent heat of fusion is the amount of heat energy required to change 1 kg of solid into liquid at its melting point.

Why Use This Question Bank?

✅ Focuses on frequently asked questions from CBSE assessments

✅ Structured for quick understanding and memorization

✅ Great for daily revision and pre-exam practice

✅ Designed by experienced Science teachers following the 2024–25 pattern

Who Should Use This?

✅ Class 9 students revising for Science exams

✅ Tutors and school teachers preparing assignments

✅ Parents supporting their child’s academics

✅ Learners preparing for school, term, or board-level evaluations

Topics Covered in This Chapter

✅ Physical nature of matter

✅ States of matter and their properties

✅ Effect of temperature and pressure

✅ Change of state: melting, boiling, sublimation

✅ Evaporation and its applications in daily life

Frequently Asked Questions (FAQs)