Which of these suggest that a chemical reaction may be occurring-Change of colourChange of stateChange in temperatureEmission of gas

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Change in State

Which of thes...

Question

Which of these suggest that a chemical reaction may be occurring?

Change of colour

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Change of state

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Change in temperature

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Emission of gas

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Solution

The correct options are
A Change of colour
B Change of state
C Change in temperature
D Emission of gas
There are several observations which can identify that some chemical reactions have taken place. These observations are

Change in temperature

Change in colour

Emission of gas

Change in state

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Question 9

Which of the following statement is incorrect for a chemical reaction?
(a) Heat may be given out but never absorbed.
(b) Sound may be produced.
(c) A colour change may take place.
(d) A gas may be evolved.

Question 3

A chemical change may involve
(a) change in colour only
(b) change in temperature only
(c) evolution of gas only
(d) All of the these

Which of these suggest that a chemical reaction may be occurring?

Q. During an experiment, Mayank made the given observations. Which of these does not indicate that a chemical reaction has occurred?

State an observation in an activity which may suggest that a chemical reaction has taken place.Give examples in support of your answer.

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Which of these suggest that a chemical reaction may be occurring?

The correct options are A Change of colour B Change of state C Change in temperature D Emission of gasThere are several observations which can identify that some chemical reactions have taken place. These observations are Change in temperature Change in colour Emission of gas Change in state

The correct options are
A Change of colour
B Change of state
C Change in temperature
D Emission of gas
There are several observations which can identify that some chemical reactions have taken place. These observations are

Change in temperature

Change in colour

Emission of gas

Change in state