ICSE 7 Chemistry
Air and Atmosphere
Question 1:
Which one of these is most likely to get corroded?
(a) a tin-plated iron sheet
(c) a galvanised iron roof
(d) a stainless steel table [Level: Moderate]
Question 2:
1) The process by which oxidation of food in our body takes place.
2) The process which is natural way of adding oxygen to air which involves green plants
3) Deterioration of iron due to formation of more stable compounds of iron due to its reaction with oxygen & water [Level: Moderate]
Question 3:
Which among the following fuel when used releases least amount of pollutants in atmosphere?
(a) Petrol
(d) LPG [Level: Difficult]
Question 4:
Give the word equation for the following reaction:
Reaction of phosphorus with oxygen [Level: Easy]
Question 5:
Give the composition of atmosphere. [Level: Easy]
Question 6:
Oxidation of sulphur results in a product which turns moist blue litmus red. Product is
(a) SO
(c) S2O
(d) S2O4 [Level: Moderate]
Question 7:
5 layers of atmosphere in the correct sequence as we move towards the earth surface is
(a) Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere
(b) Thermosphere, Mesosphere, Stratosphere, Troposphere, Exosphere
(c) Exosphere, Thermosphere, Mesosphere, Stratosphere, Troposphere
(d) Stratosphere, Mesosphere, Thermosphere, Exosphere, Troposphere [Level: Difficult]
Question 8:
Inert gas which comprises 0.9% of air is
(a) helium
(b) neon
(d) krypton [Level: Easy]
Question 9:
State the gases which are consumed during the following processes:
2) Photosynthesis
3) Combustion
4) Rusting [Level: Moderate]
Question 10:
Select the incorrect statement from the below given statements:
(a) Oxygen is second most abundant component of atmosphere.
(b) Layer of atmosphere closest to earth’s surface is troposphere.
(c) Atmosphere doesn’t allow ultraviolet radiations to reach the earth’s surface
(d) Atmosphere doesn’t maintain optimum temperature conditions required for the existence of organisms. [Level: Moderate]
Question 11:
Free-living or symbiotic microorganisms fix atmospheric nitrogen which is used by plants for synthesis of protein. Amount of nitrogen in atmosphere is
(a) decreasing
(b) increasing
(d) none of the above [Level: Difficult]
Question 12:
Rusting is a chemical reaction which involves oxidation. But the oxidation is
(a) fast
(d) neither fast nor slow [Level: Easy]
Question 13:
Carbon dioxide turns the moist blue litmus paper to slightly pink. This indicates that CO2 is
(a) neutral
(c) basic
(d) alkaline [Level: Difficult]
Question 14:
Which among the following is called oxygenated water?
(a) H2O
(b) H2O vapour
(d) Hydrogen peroxide [Level: Moderate]
Question 15:
From where does the following organisms get oxygen to respire?
b) Earthworms
c) Roots of plants [Level: Moderate]
Question 16:
Why nitrogen is filled in the packets of chips?
(a) Inert nature of nitrogen
(b) Reactive nature of nitrogen
(c) Flavour enhancing nature of nitrogen
(d) Nutrient enhancing nature of nitrogen [Level: Moderate]
Question 17:
Why solid carbon dioxide is used as refrigerant? [Level: Difficult]
Question 18:
What is the role of MnO2 in the lab preparation of O2?
(a) reactant
(b) product
(c) promoter
(d) catalyst [Level: Easy]
Question 19:
Which among the following statement is incorrect about respiration?
(a) Slow oxidation
(b) Natural process
(c) Occurs at body temperature
(d) Large amount of energy is released in form of heat only [Level: Moderate]
Question 20:
State the following physical properties of oxygen gas:
1) Nature
2) Density
3) Liquefaction
4) Solubility in water [Level: Moderate]
**********
In summary, problem-solving after learning a theoretical concept on CBSE Air and Atmosphere ICSE 7 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.
You must have heard of the phrase “Practice makes a man perfect”. Well, not just a man, practice indeed enhances perfection of every individual.
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 7 Chemistry Air and Atmosphere NCERT Chapter 7
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 7 Chemistry Air and Atmosphere NCERT Chapter 7 useful.
Last but not least, to get the best hold on ICSE 7 Chemistry Air and Atmosphere NCERT Chapter 7, do not forget to check out: