CameraIcon

SearchIcon

MyQuestionIcon

2

You visited us 2 times! Enjoying our articles? Unlock Full Access!

Chemical Change

While teachin...

Question

While teaching a topic of physics and chemistry chemical changes, Mahima teacher listed the following conditions took during that place
change in state
change in colour
evolution of gas
change in temperature
teacher than asked Mahima to identify the condition based on which it can be said with certainly that a particular change is chemical in nature
among the options which should be selected by mahima
only 1
only 3
both 3 and 4
both 1 and 4

Open in App

Solution

Only 3, evolution of as is the answer.

Release of a gas is an indication of a chemical change and not a physical change.

The other 3 conditions can happen during a physical change as well.

Suggest Corrections

thumbs-up

0

Similar questions

While teaching the topic of physical and chemical changes, Mahima’s teacher listed the conditions that take place during a change.

I. Change in state

II. Change in colour

III. Evolution of a gas

IV. Change in temperature

He then asked Mahima to identify the conditions based on which it can be said with certainty that a particular change is chemical in nature.

Among the changes that are listed by the teacher, which changes should be selected by Mahima?

Q. Matter undergoes a change. The changes are of two types: Physical and chemical change.

A physical change is a change that involves only a change in the physical state of matter. Its chemical properties remain the same. Usually increasing the temperature or applying pressure or both bring about a physical change. On reversing the condition, that is reducing the temperature or reducing the pressure or both, the original state of matter is restored. In other words, physical changes are reversible.

A chemical change is a change that involves a change in the chemical composition of matter. A new substance is formed. In a chemical change, new chemical and physical properties of the substance are formed. In a chemical change, the chemical and physical properties of the substance formed will be different from the original substance.

In a chemical change, the properties that change are :

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

Q. Matter undergoes a change. The changes are of two types : Physical and chemical change. A physical change is a change that involves only a change in the physical state of matter.
Its chemical properties remain the same. Usually increasing the temperature of applying pressure or both brings about a physical change. On reversing the condition, i.e., reducing the temperature or reducing the pressure or both, the original state of matter is restored. In other words, physical changes are reversible. A chemical change is a change that involves a change in the chemical composition of matter. A new substance is formed. In a chemical change, the chemical and physical properties of the substance is formed. In a chemical change, the chemical and physical properties of the substance formed will be different from the original substance. When zinc carbonate is heated and cooled, the change(s) that are observed are :

Which of the following observations helps to determine whether a chemical reaction has taken place or not?

(i) Change in state.

(ii) Change in colour.

(iii) Change in shape

(iv) Evolution of gas.

(v) Change in temperature.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Adaptive Q10

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Chemical Change

Standard VI Chemistry

Join BYJU'S Learning Program

CrossIcon