Fill in the blanks with suitable words:
(a) A fuel must be heated to its……… before it starts burning.
(b) The most common supporter of combustion around us is……………..
(c) Fire produced by burning oil cannot be controlled by…………………….
(d) A liquid fuel used in homes is………
(e) The amount of heat evolved when 1kg of a fuel is burnt completely is called its…………………..
(f) The substance which vaporize during, give…………………..
(g) Burning of wood and coal causes……………. of air.
Fill in the blanks with suitable words:
(a) A fuel must be heated to its ignition temperature before it starts burning.
(b) The most common supporter of combustion around us is air.
(c) Fire produced by burning oil cannot be controlled by water.
(d) A liquid fuel used in homes is kerosene.
(e) The amount of heat evolved when 1kg of a fuel is burnt completely is called its calorific values.
(f) The substance which vaporize during, give flames.
(g) Burning of wood and coal causes pollution of air.
Related Articles
- Fill in the blanks.(a) Burning of wood and coal causes _____ of air.(b) A liquid fuel, used in homes is ______(c) Fuel must be heated to its ______ before it starts burning.(d) Fire produced by oil cannot be controlled by ______
- Fill in the blanks:Burning of wood and coal causes ………. of air.A liquid fuel, used in homes is ……….Fuel must be heated to its ……….. before it starts burning.Fire produced by oil cannot be controlled by ……………
- Fuel must be heated to its ……….. temperature before it starts burning.
- Fill in the following blank with a suitable word:The amount of heat produced by burning a unit mass of a fuel completely is known as its __________ value.
- (a) What is a flame? What type of substance, on burning, give a flame?(b) What is the difference between the burning of a candle and the burning of a fuel like coal.
- While cooking, if the bottom of the vessel is getting blackened on the outside, it means that(a) food is not cooked completely (b) the fuel is not burning completely(c) fuel is wet(d) fuel is burning completely.
- Fill in the blanks using the words given in the box. ignition, petrol, combustion, calorific value, combustible, inflammable(a) A chemical process in which a substance reacts with oxygen to give off heat is called ………………(b) Wood, paper, CNG are ……………substances.(c) The lowest temperature at which a substance catches fire is called its …………… temperature.(d) Ignition temperature of……………… is lower than that of wood.(e) The substances which have very low……………… temperature and can easily catch fire with a flame are called…………….. substances.(f) The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its …………….
- Fill in the following blanks with suitable words:(a) Fossil fuels are…………and…….(b) Coal contains mainly……………(c) The slow process of conversion of dead vegetation into coal is called……………(d) The process of separation of different constituents from petroleum is called………………(e) The least polluting fuel for vehicles is…….(f) The burning of fossil fuels causes air………….and also leads to global……………
- While cooking, if the bottom of the vessel is getting blackened on the outside, it means thatthe food is not cooked completely.the fuel is not burning completely.the fuel is wet. the fuel is burning completely.
- What are the disadvantage of burning wood as fuel?
- (a) Write the chemical equation of the reaction which takes place during the burning of ethanol in air.(b) Why is ethanol used as a fuel?(c) State two used of ethanol (other than as a fuel).
- The total amount of heat produced by a fuel having a calorific value of 20kJ/kg was found to be 50,000 joules. How much fuel was burnt?
- What type of combustion is represented by:(a) burning of white phosphorus in air at room temperature?(b) burning of LPG in a gas stove?(c) ignition of a cracker?(d) burning of coal dust in a coal mine?
- In an experiment, 4.5 kg of a fuel was completely burnt. The heat produced was measured to be 1,80,000 kJ. Calculate the calorific value of the fuel.
- How is the fire produced by burning oil (or petrol) extinguished?
Kickstart Your Career
Get certified by completing the course
Get Started
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies