Class 7 Science MCQs - Chapter 7
Elements and Compounds Multiple Choice Questions (MCQs) PDF Download - 5
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Elements and Compounds MCQs with Answers PDF Download: Quiz 5
To make specific compound, elements are mixed in a fix proportion by
- mass
- weight
- volume
- density
The dense white fumes which can be seen upon gas ammonia are due to mixing of
- hydrogen chloride
- nitrogen dioxide
- ammonium chloride
- calcium chloride
With one hundred elements the compounds that may be made, will be above
- millions
- thousands
- hundreds
- trillions
The formation of compounds involve
- chemical reaction
- physical reaction
- evaporation
- distillation
Water is broken down into small units by passing it through
- heat
- electricity
- magnet
- current
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