Chapter 4 -Combustion and Flame 1. List Conditions Under Which Combustion Can Take Place. 2. Fill in the blanks a) Burning of wood and coal causes ______ of air. Ans- Burning of wood and coal causes pollution of air. b) A liquid fuel used in homes is _____. Ans– A liquid fuel used in homes…
Coal And Petroleum Exercises 1. What are the advantages of using CNG and LPG as fuels? Ans-CNG (Compressed Natural Gas) and LPG (Liquefied Petroleum Gas) have several advantages as alternative fuels: CNG and LPG offer several significant advantages in terms of environmental impact, cost savings, and versatility as alternative fuel options. 2. Name the petroleum…
Chapter- 2 Microorganisms: Friend and Foe Que 1 Fill in the blanks. Answer (a) Microorganisms can be seen with the help of a _microscope____(b) Blue-green algae fix __nitrogen____ directly from the air to enhance the fertility of soil.(c) Alcohol is produced with the help of __yeast___(d) Cholera is caused by _bacteria_____ Question 2. Tick…
chapter 1- CROP PRODUCTION AND MANAGEMENT Solution (i) Kharif crops – e) Paddy and maize ii) Rabi crops d) Wheat gram pea (iii) Chemical fertilizers (b) Urea and super phosphate (iv) Organic manure (c) Animal excreta, cow dung urine and plant waste . 3. Give two examples of each. (a) Kharif crop (b) Rabi crop solution (a)…