Class 9 Science
Matter In Our Surroundings
Question1.
The rate of evaporation depends upon
(a) surface area
(b) temperature
(c) humidity
(d) all of these
Question 2.
On summer days, I was serving a glass of cold fruit Juice to our guest and I observed water droplet on to the outer wall of the glass, why it happened ?
Question3.
Why sanitizer or acetone gives you cooling sensation?
Question4.
Why our clothes dry faster on windy days?
Question5.
Define the process evaporation.
Question6.
What do you mean by dry ice and what is the process of preparing it?
Question7.
What is latent heat of vaporization?
Question8.
Mark the incorrect statement for the following.
(a) The arrangement of particles is most ordered in the case of solids.
(b) The states of matter are inter-convertible.
(c) Boiling is a surface phenomenon while Evaporation is a bulk phenomenon.
(d) The rate of evaporation depends upon wind speed.
Question9.
The energy required to change 1 kg of solid into liquid at its melting point is called
(a) latent heat of vaporization.
(b) latent heat of melting.
(d) latent heat of evaporation.
Question10.
Give the name of following conversion.
Question11.
Convert the following to the Celsius scale:
(a) 398K (b) 250K (c) 100K
Question12.
Which of the following have high melting point and what does the melting point indicates -
(a) iodine solid
(b) NaCl solid
(c) solid CO2
(d) ammonium nitrate
Question13.
The rate of diffusion of liquids is -
(a) lower that the solid
(b) equal to solid
(c) higher than the solid
(d) negligible compare to solid
Question14.
The atmospheric pressure at sea level is –
(a) one pascal
(b) zero pascal
(c) three pascals
(d) ten pascals
Question15.
Effusion is _________.
Question16.
Why camphor left no traces, when I keep it in an open surrounding?
Question17.
Arrange the following
Gas , liquid and solid
In increasing order of –
(a) Kinetic energy (b) Arrangement particle (c) Rate of Diffusion (d) Compressibility (e) Rigidity
Question18.
1 atmosphere is equal to
(a) 1.01 × 105 Pa.
(b) 1.01 x 10-14 Pa
(c) 1.10 x 1015 Pa
(d) 10.1 x 1014 Pa
Question19.
Particles in plasma are in form of
(a) ionised particle
(b) electrons
(c) ionises gases
(d) neutrons
Question20.
Match the following:
(a) Pressure - kgm-3
(b) Temperature - Pa
(c) Density - m3
(d) Volume - J
(e) Heat - K
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Practicing questions plays a pivotal role in achieving excellence in exams. Just as the adage goes, "Practice makes perfect," dedicating time to solve a diverse range of exam-related questions yields manifold benefits. Firstly, practicing questions allows students to familiarize themselves with the exam format and types of problems they might encounter. This familiarity instills confidence, reducing anxiety and improving performance on the actual exam day. Secondly, continuous practice sharpens problem-solving skills and enhances critical thinking, enabling students to approach complex problems with clarity and efficiency. Thirdly, it aids in identifying weak areas, allowing students to focus their efforts on improving specific topics. Moreover, practice aids in memory retention, as active engagement with the material reinforces learning. Regular practice also hones time management skills, ensuring that students can allocate appropriate time to each question during the exam. Overall, practicing questions not only boosts exam performance but also instills a deeper understanding of the subject matter, fostering a holistic and effective learning experience.
All About Daily Practice Problems on Class 9 Science Matter In Our Surroundings NCERT Chapter 1
Our Daily Practice Problems (DPPs) offer a diverse range of question types, including Multiple Choice Questions (MCQs) as well as short and long answer types. These questions are categorized into Easy, Moderate, and Difficult levels, allowing students to gradually progress and challenge themselves accordingly. Additionally, comprehensive solutions are provided for each question, available for download in PDF format - Download pdf solutions as well as Download pdf Questions. This approach fosters a holistic learning experience, catering to different learning styles, promoting self-assessment, and improving problem-solving skills. With our well-structured DPPs, students can excel in exams while gaining a deeper understanding of the subject matter. Hope you found the content on Class 9 Science Matter In Our Surroundings NCERT Chapter 1 useful.
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