7th Standard Syllabus & Materials
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Published on: 16/06/2021
QB365 provides detailed and simple solution for every Book back Questions in class 7 Science Subject. It
will helps to get more idea about question pattern in every book back questions with solution.
Download Tamil Nadu 7th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
Write down the properties of metalloids
2.
Write any five characteristics of compounds.
3.
Differentiate between elements and compounds
4.
Explain the characteristics of compounds
5.
Differentiate metals and non metals.
1.
Properties of metalloids :
(i) Metalloids exhibit the properties of both metals and non-metals.
(ii) Unusually they look like metals but behave largely like non-metals,
(iii) They can form alloys like metals.
2.
i) A compound is formed only when the constituent elements combine in a fixed proportion.
ii) Compound exhibits entirely different properties of their constituent elements.
iii) A compound cannot be broken down by physical methods.
iv) A compound can be separated into its constituent elements by chemical methods only.
v) Compound is made up of different elements that are chemically combined.
3.
| Elements | Compunds |
| (i) An element is the simplest substance | (i) They formed by the cornbination of two or more elements. |
| (ii) They combine to form compounds | (ii) They can be splited into elements. |
| (iii) Atoms are the fundamental particle of an element | (iii) Molecules are the fundamental particles of a compound. |
4.
i) A compound is formed only when the constituent elements combine in a fixed proportion.
ii) Compound exhibits entirely different properties of their constituent elements.
iii) A compound cannot be broken down by physical methods.
iv) A compound can be separated into its constituent elements by chemical methods only.
5.
| Metals | Non-metals |
| (i) Lustrous and have shiny surface. | (i) Non-lustrous and have non-shiny surface. |
| (ii) They are generally hard. | (ii) They are generally Soft. |
| (iii) They are ductile. | (iii) They are non-ductile. |
| (iv) Good conductors of heat and electricity. | (iv) Bad conductors of heat and electricity. |
| (v) Metals are making sound when struck.(Sonorous) | (v) Non-metals do not make sound when struck. (Non-sonorous) |
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Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards
