Air Around Us
13 solved questions from Class 6 Science, each with the full working. Tap any question to see the step-by-step solution.
- 1 What is the fundamental scientific concept introduced in the chapter 'Air Around Us'? medium MCQ Key Concept & Definition
- 2 Which of the following is an important application or observation related to 'Air Around Us'? easy MCQ Practical Application
- 3 What primary question does the chapter 'Air Around Us' aim to answer? medium MCQ Core Scientific Inquiry
- 4 Why is the study of 'Air Around Us' essential for students in class-6? hard MCQ Importance & Significance
- 5 Which key practice is recommended while studying topics in 'Air Around Us'? medium MCQ Scientific Method
- 6 What is the primary topic or theoretical principle explored in 'Air Around Us' (Class 6 SCIENCE)? medium MCQ Chapter Core Principle
- 7 Which key mechanism or analytical rule is highlighted in 'Air Around Us'? medium MCQ Key Analytical Mechanism
- 8 A small village is located at an altitude of 2000 m above sea level. The barometric pressure at sea level is 1013 hPa. Assuming air density decreases with altitude such that pressure drops by 10 % for every 500 m rise, estimate the barometric pressure in the village. (Round to nearest hPa). hard 3 marks Pressure decrease with altitude
- 9 Which gas constitutes about 78 % of the Earth's atmosphere? easy MCQ 1 mark Composition of air
- 10 In a simple U‑tube manometer, the left arm contains a 2 m column of mercury higher than the right arm. What is the pressure difference between the two sides in pascals? (Use ρ = 13600 kg/m³ for mercury, g = 9.8 m/s²). medium MCQ 2 marks Pressure difference using manometer
- 11 In a U‑tube manometer, the left arm contains a 3 cm column of water higher than the right arm. What is the pressure difference between the two sides in pascals? Assume density of water = 1000 kg/m³ and g = 9.8 m/s². hard 3 marks Pressure difference using fluid column
- 12 What percent of Earth's atmosphere is nitrogen? easy MCQ 1 mark Composition of air
- 13 A sealed plastic bag of volume 1.5 m³ at sea level has internal pressure equal to 1 atm (1013 hPa). If the bag is taken to an altitude where the barometric pressure drops by 15 %, what is the pressure inside the bag (in hPa)? medium 2 marks Pressure variation with altitude