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Chemical Properties of Non-Metals

In a chemical...

Question

In a chemical change, the original substance loses its own ------------------------------------------ and properties.

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Solution

Chemical change: It is a permanent change in which the original substance loses its composition and properties.
A chemical change in which new substances is formed
The compositions and properties are changed.
Chemical change is not reversible.
Example: The ripening of fruits is a chemical change.
Therefore In a chemical change, the original substance loses its own composition and properties.

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In a chemical change properties of new substance formed are__________ from the original one.

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 :

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 :

Q. Sate which of the following pertains to- chemical changes.
a] substance retains its identity
b] The change is permanent
c] No new substance is formed.
d] is easily reversible
e] Produces one or more new substance in its composition.
f] The change is temporary
g] The composition and properties of the original substance are not altered.

Q. Which of the following is not a feature of chemical change?

(I) Original substance can be obtained by simple physical methods.
(II) It is a temporary change.
(III) The new substances formed have properties different from those of the reacting substances.

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