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Energy

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Question

Any substance that can be reacted with another substance(s) to produce energy that can be put to do with work it’s called fuel. Type 1 for true and 0 for false

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Solution

Any substance that can be reacted with another substance(s) to produce energy that can be put to do with work it’s called fuel.

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Q. Write T for the correct statement and F for the false one. Correct the false statement(s).
1. Pituitary gland is called the master gland.
2. Petroleum is not a fossil fuel.
3. The addition of undesirable substances to the air is called air pollution.
4. Sodium can be cut with a knife.
5. Most synthetic fibres have poor elasticity.

Q. 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 1kg of a fuel is called its ______.

Q. Question 26
Fill in the blanks using the words given in the box.

(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 1kg of a fuel is called its ___.

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