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Science Fill in the blanks

Elements, Compounds and Mixtures · Maharashtra Board STD 7 (MSBSHSE - English Medium). 20 questions.

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20 questions · self-marked practice — reveal the answer and mark yourself.

Question 11 Mark
For separating insoluble particles of blood (blood cells) from its liquid part (plasma), ……………….. method is used.
Answer
centrifugation
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Question 21 Mark
……………….. of a compound is a short form of its name written using symbols of its constituent elements.
Answer
Molecular formula
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Question 41 Mark
Symbol for Tungsten is and it is ……………….. and it is derived from its German name ……………….. .
Answer
W, Wolfram
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Question 61 Mark
To date, scientists have discovered ……………….. elements and of these ……………….. elements occur in nature.
Answer
118, 92
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Question 81 Mark
Elements are generally classified into ……………….. and ……………….. .
Answer
metal, non-metals
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Question 91 Mark
The elements that show some properties of metals and non-metals are called ……………….. .
Answer
metalloids
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Question 101 Mark
The substance formed by a chemical combination of two or more elements is called a ……………….. .
Answer
compound
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Question 181 Mark
A ……………….. has a definite volume, but not a definite shape, it takes the shape of its container.
Answer
liquid
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