Advertisements
Advertisements
Question
Fill in the blanks using the words given in the box.
ignition | petrol | combustion | calorific value | combustible | combustible |
The substances which have very low ______ temperature and can easily catch fire with a flame are called ______ substances.
Solution
The substances which have very low ignition temperature and can easily catch fire with a flame are called inflammable substances.
APPEARS IN
RELATED QUESTIONS
A substance which reacts with oxygen giving heat is called a combustible substance. Which one of the following is a combustible substance?
A ______ process in which a substance reacts with ______ to give off heat is called combustion.
Some words (underlined) in the following sentence is jumbled up. Write them in their correct form.
Seldie is a combustible substance.
Two glass jars A and B are filled with carbon dioxide and oxygen gases respectively. In each jar, a lighted candle is placed simultaneously. In which jar, will the candle remain lighted for a longer time and why?
Match the items of Column A with the items of Column B.
Column A | Column B |
(a) Oxides of sulphur and nitrogen | (i) fire extinguisher |
(b) CNG | (ii) incomplete combustion of coal |
(c) Oxygen | (iii) very low ignition temperature |
(d) inflammable substance | (iv) acid rain |
(e) carbon dioxide | (v) necessary for combustion |
(f) carbon monoxide | (vi) fuel for automobiles |
Write True/False against the following statement and also correct the false statement.
Increased concentration of nitrogen in air is believed to cause global warming.
Give one example of spontaneous combustion.
Fill in the blanks using the word given in the box.
ignition | petrol | combustion | calorific value | combustible | combustible |
Wood, paper, CNG are ______ substances.
Fill in the blanks using the word given in the box.
ignition | petrol | combustion | calorific value | combustible | combustible |
The lowest temperature at which a substance catches fire is called its ______ temperature.
Fill in the blanks using the words given in the box.
ignition | petrol | combustion | calorific value | combustible | combustible |
Ignition temperature of ______ is lower than that of wood.