Daily Practice Problems Physical and Chemical Changes

Question 1:

Which among the following is slow change?

(a) Burning of fire crackers

(b) Burning of fuel

(d) Burning of candle [Level: Easy]

Question 2:

Which among the following is fast change?

(a) Burning of fire crackers

(b) Formation of Fossil fuel from dead plants & animals

(d) Curdling of milk [Level: Easy]

Question 3:

Which among the following is reversible change?

(a) Burning of fire crackers

(b) Formation of Fossil fuel from dead plants & animals

(d) Conversion of ice to water [Level: Moderate]

Question 4:

Which among the following is irreversible change?

(a) Formation of water vapours from liquid water

(b) Formation of Fossil fuel from dead plants & animals

(d) Conversion of ice to water [Level: Moderate]

Question 5:

Sam lighted a candle. Which of following change is taking place?

(a) Only physical change

(b) Only chemical change

(d) Natural change [Level: Difficult]

Question 6:

Which among the following is Physical change?

(a) Rusting of iron

(b) Curdling of milk

(d) Dissolution of sugar in water [Level: Moderate]

Question 7:

Heat energy can be released or absorbed during

(a) Only Physical Change

(b) Only Chemical Change

(d) Only man-made change & not in natural change [Level: Moderate]

Question 8:

Chemical Change is

(a) only reversible

(b) only irreversible

(d) only natural change [Level: Moderate]

Question 9:

Which among the following is Chemical change?

(a) Sublimation of Naphthalene

(b) Melting of wax

(d) Dissolution of salt in water [Level: Moderate]

Question 10:

Boiling of water is physical change whereas passing electric current through water to liberate H₂ & O₂ is a chemical change. Why? [Level: Difficult]

Question 11:

Burning of candle is example of

(a) Only physical Change

(b) Only chemical Change

(d) Periodic change [Level: Moderate]

Question 12:

Shyam made delicious sandwiches for breakfast. He forgot to keep the butter he used in Refrigerator after preparing sandwiches. Unfortunately, butter got rancid. The following change is

(a) Physical Change

(b) Chemical Change

(d) Periodic change [Level: Moderate]

Question 13:

Melting of butter is

(a) Physical Change

(b) Chemical Change

(d) Periodic change [Level: Easy]

Question 14:

In certain chemical industry, petroleum was separated into its various components like petrol, diesel by fractional distillation. Above change is physical or chemical? Justify. [Level: Difficult]

Question 15:

Match the following:

Column A	Column B
1) Rusting of iron	a) Periodic change
2) Separation of mixture of iron & sulphur	b) Chemical change
3) Landslide	c) Physical change
4) Change of season	d) Non-periodic change

[Level: Moderate]

Question 16:

No new substance is formed in

(a) Physical Change

(b) Chemical Change

(d) Irreversible change [Level: Easy]

Question 17:

State why addition of sugar to water is considered as physical change, while addition of dilute sulphuric acid to zinc is considered as chemical change. [Level: Difficult]

Question 18:

Respiration is process by which digested food material reacts with oxygen & energy is released. Answer the following questions:

a) Are any new products formed during respiration?

b) Is the above change natural or man-made? [Level: Moderate]

Question 19:

Raj was heating solid ammonium chloride crystals in a beaker. He observed vapours of ammonium chloride coming out of the beaker. Which of the following change took place?

(a) Only reversible change

(b) Only physical change

(d) Chemical change [Level: Difficult]

Question 20:

Which among the following is man-made change?

(a) Change of seasons

(b) Making of jewellery from gold

(d) Evaporation of sea water [Level: Easy]

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In summary, problem-solving after learning a theoretical concept on CBSE Physical and Chemical Changes ICSE 8 Chemistry is an essential part of the learning process. It enhances your understanding, critical thinking abilities, and retention of knowledge. Moreover, it equips you with valuable skills that are applicable in academic, personal, and professional contexts.

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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 ICSE 8 Chemistry Physical and Chemical Changes NCERT Chapter 2

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 ICSE 8 Chemistry Physical and Chemical Changes NCERT Chapter 2 useful.

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