If an atom A has a mass number 'x' and atomic number 'y' ( Axy ) and it forms an ion A− by losing an electron. What can we say about the mass number of the ion?
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Industrially, hydrogen is prepared by passing ___ over red-hot coke at high temperature.
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Categorize the following substances as Metals and Non-metals: Graphite, Zinc, Diamond, Oxygen, Sodium, Aluminium, Silver, Carbon, Mercury, Phosphorous [5 MARKS]
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Name a fossil fuel other than coal and petroleum.
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The property of virtue of which metals can be drawn into wire is known as:
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Write the full form of PVC. Is it thermoplastic or thermosetting plastic ?
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Cooked food is an example of ___ change.
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The most common fire extinguisher is:
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Hydrochloric acid is acidic in aqueous solution because there are more ___ ions than ___ ions.
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What is obtained when a metal oxide of the highly reactive metals react with water?
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Why does nylon become very popular for making clothes for mankind?
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Why do most of elements form ions while entering into chemical reactions?
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What is suspension and colloidal solution
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What makes litmus paper to change its colour?
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