MEDIUM
9th CBSE
IMPORTANT
Earn 100

Read the passage and answer the following questions:

Element is the simplest form of a pure substance which cannot be divided further into another simple substance. Thus, we can say that it is made up of only one kind of atoms. Out of 114 elements known today, 92 are natural and rest are made by man. Elements can be classified as :

Metals, non-metals, metalloids, inert gases. To identify the elements, usually a symbol is assigned, e.g., C is the symbol for carbon. Elements are different from compounds, as they cannot be broken down further, whereas a compound can be broken down. Both elements and compounds are pure substances.

  1. Which of the following elements is not solid at room temperature?

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Important Questions on Is Matter around Us Pure

EASY
9th CBSE
IMPORTANT

Read the passage and answer the following questions:

Element is the simplest form of a pure substance which cannot be divided further into another simple substance. Thus, we can say that it is made up of only one kind of atoms. Out of 114 elements known today, 92 are natural and rest are made by man. Elements can be classified as :

Metals, non-metals, metalloids, inert gases. To identify the elements, usually a symbol is assigned, e.g., C is the symbol for carbon. Elements are different from compounds, as they cannot be broken down further, whereas a compound can be broken down. Both elements and compounds are pure substances.

2. What can you say about sugar?

EASY
9th CBSE
IMPORTANT
Element is the simplest form of a pure substance which cannot be divided further into another simple substance. Thus, we can say that it is made up of only one kind of atoms. Out of 114 elements known today, 92 are natural and the rest are made by man. Elements can be classified as:
Metals, non-metals, metalloids, inert gases. To identify the elements, usually, a symbol is assigned, e.g., C is the symbol for carbon. Elements are different from compounds, as they cannot be broken down further, whereas a compound can be broken down. Both elements and compounds are pure substances.
Rn, Ar, Xe  are all symbols of
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9th CBSE
IMPORTANT
Calculate the concentration of a solution if 20g of solute is dissolved in 240g of solvent?
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9th CBSE
IMPORTANT
A solution contains 20 ml of alcohol mixed with 100 ml water. What is the concentration of the solution?
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9th CBSE
IMPORTANT
4 ml acetone is present in 60 ml of its aqueous solution. Calculate the concentration of the solution
EASY
9th CBSE
IMPORTANT
If 10g of a particular salt is dissolved in 60 g of water at 60 degrees Celsius, what is the solubility at the given temperature?
EASY
9th CBSE
IMPORTANT
How much water should be added to 50g of glucose to obtain 12% solution?