EASY
Earn 100

Combustion reaction is a type of exothermic reaction.

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Important Questions on Energy

HARD
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
If the first order rate constants for the decomposition of ethyl iodide at 600 K and 700 K are 2.0×10-5 s-1 and 2.0×10-4 s-1 respectively, the activation energy for this reaction in kJmol-1 is
EASY
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
The unit of activation energy is
EASY
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
An exothermic reaction X→Y has an activation energy 30 kJ mol-1. If energy change ΔE during the reaction is -20 kJ, then the activation energy for the reverse reaction in kJ is                (Integer answer)
HARD
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
For the following reactions
A→700KProduct
A→catalyst500KProduct
It was found that the Ea is decreased by 30 KJ/mol in the presence of catalyst. If the rate remains unchanged, the activation energy for catalysed reaction is (Assume pre-exponential factor is same)
MEDIUM
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
Hydrogen is a good fuel even then it is not being used in our homes and industries. Why?
EASY
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
Incomplete combustion gives _____.
MEDIUM
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
Which of the following undergoes spontaneous combustion?
MEDIUM
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
Fires in underground coal mines usually occur due to the:
MEDIUM
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
What is meant by rapid combustion? Give one example of rapid combustion.
EASY
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
What is known as spontaneous combustion?
MEDIUM
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
Differentiate between Spontaneous combustion and explosion
EASY
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
Volatile: _____ :: non-volatile : charcoal (silver nitrate / camphor)
HARD
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
Describe the types of combustion giving suitable examples.
MEDIUM
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
Respiration is a type of combustion.
EASY
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
What is known as explosion?
MEDIUM
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
Explain how removal of the elements of a fire helps to extinguish it.
EASY
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
What is known as rapid combustion?
MEDIUM
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
Distinguish between combustion and rusting with suitable word equations only.
EASY
Chemistry>Change>Energy>Energy Changes in Chemical Reactions

Write the quadrants in which the following points lie:

-4,7

MEDIUM
Chemistry>Change>Energy>Energy Changes in Chemical Reactions
Differentiate between Spontaneous and rapid combustion.