Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
An arrow is drawn in between the reactants and products while writing the equation for a chemical reaction.
संबंधित प्रश्न
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
TRUE \ FALSE
Temperature at which a liquid starts boiling is known as the boiling point of that liquid. True or false ?
Fill in the blank
A new substance is always formed in a _______ change.
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
To prevent rusting, a layer of ______ metal is applied on iron sheets.
Give an example of the following chemical change.
A reaction where colour change is noticed
Write the chemical reaction where the following changes are observed.
Colour change is noticed
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
What kind of a change is associated with decaying of a plants?
Two chemical species X and Y combine together to form a product P which contains both X and Y
\[\ce{X + Y -> P}\]
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
(iv) P has a fixed composition
