Pure Substances
Pure Substances
In chemistry when we say a substance is pure, it means that the substance is made up of only one type of constituent particles. A pure substance consists of a single type of particles. In other words, a substance is a pure single form of matter.
Depending upon the chemical composition, matter is classified into elements, compounds (i.e. pure substances that are non separable by physical methods) and mixtures (separable by physical methods like sublimation).
Pure substances: Substance that consists of only single type of constituent particles is called pure substance like gold, water etc. It can be of two types: elements and compounds.
Characteristics and Properties of Pure Substances :-
Pure substances are mostly homogeneous in nature containing only one type of atoms or molecules.
These substances mainly have a constant or uniform composition throughout.
The substances have fixed boiling and melting points.
A pure substance usually participate in a chemical reaction to form predictable products.
Examples of Pure Substances :-
All elements are mostly pure substances. A few of them include gold, copper, oxygen, chlorine, diamond etc. Compounds such as water, salt or crystals, baking soda amongst others also grouped as pure substances.
Which of the following are correct : (a) Pure substances mainly have a constant or uniform composition throughout. (b) Pure substances are mostly homogeneous in nature containing only one type of atoms or molecules. (c) Pure substances have fixed boiling and melting points. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following statements is false with regard to molecules? | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following is a pure substance ? (a) Salt (b) Sugar | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [20]
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
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Om Umang
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Yogansh Nyasi
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Archit Segal
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Hridey Preet
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10thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thWhen I have not joined Abhyas Academy, my skills of solving maths problems were not clear. But, after joining it, my skills have been developed and my concepts of science and SST are very well. I also came to know about other subjects such as vedic maths and reasoning.
Sharandeep Singh
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Manish Kumar
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Barkha Arora
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thWe started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
Manya
8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
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Ayan Ghosh
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
