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प्रश्न
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
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उत्तर
Chemical property
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संबंधित प्रश्न
A solution of a substance ‘X’ is used for white washing write the reaction of the substance ‘X’ named in (a) above with water.
Complete the statement by filling the gap using an appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
Give an example of a reaction where the following are involved:
Close contact
State the type of reactions for the following represent and balance the ones that are not balanced.
Cl2 + 2KBr → 2KCl + Br2
Give an example of the following chemical changes.
A reaction where colour change is noticed.
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
Burning of paper is a ______ change.
A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Can you change rust back into iron by some simple method?
The simplest method of preventing rusting of iron is to coat it with oil, grease, or paint. The reason being ______.
