Question

A. Fill in the blanks.
1. An element is a _______ as it has atoms of only one kind.
2. A symbol represents one ______ of an element,
3. A ______ always contains the same elements combined together chemically in a fixed ratio.
4. _____ is either absorbed or given out when a compound is formed.
5. The elements present in ammonia are ______and _____.
6. _________
is used in the preparation of glass.
7. A sieve consists of a ______ placed over a frame.
8. The technique of _________is used daily in our houses to separate tea leaves from tea using a ______.​

Answer 1

A. Fill in the blanks.

1. An element is a pure substance as it has atoms of only one kind.

2. A symbol represents one single atom of an element.

3. A compound always contains the same elements combined together chemically in a fixed ratio.

4. Heat is either absorbed or given out when a compound is formed.

5. The elements present in ammonia are Nitrogen and Hydrogen.

6. Limestone(CaCO₃)  is used in the preparation of glass.

7. A sieve consists of a metal placed over a frame.

​8. The technique of filtration is used daily in our houses to separate tea leaves from tea using a strainer.​

Answer 2

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>>>  A. Fill in the blanks. <<<

> 1)  An element is a pure substance as it has atoms of only one kind.

> 2)  A symbol represents one single atom of an element.

> 3) A compound always contains the same elements combined together chemically in a fixed ratio.

> 4)  Heat is either absorbed or given out when a compound is formed.

> 5)  The elements present in ammonia are Nitrogen and Hydrogen.

> 6)  Limestone,Calcium Carbonate (CaCO₃)  is used in the preparation of glass.

> 7)  A sieve consists of a metal placed over a frame.

> ​8)  The technique of filtration is used daily in our houses to separate tea leaves from tea using a strainer.​

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