Advertisements
Advertisements
प्रश्न
What does the symbol (aq) represent in a chemical equation?
Advertisements
उत्तर
The symbol (aq) stands for aqueous solution. When it is written after a formula in a chemical equation, it represents that the element or compound is a solution made in water.
APPEARS IN
संबंधित प्रश्न
Translate the following statement into chemical equation and then balance it.
Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
On what basis is a chemical equation balanced?
Complete and balance the following equation:
CA (OH)2 + ............. 
CaCO3 + H2O
What are the various ways in which a chemical equation can be made more informative? Give examples to illustrate your answer.
Aluminium burns in chlorine to form aluminium chloride (AlCl3). Write a balanced chemical equation for this reaction.
Ammonia reacts with oxygen to form nitrogen and water. Write a balanced chemical equation for this reaction. Add the state symbols for all the reactants and products.
State one characteristic of the chemical reaction which takes place when dilute hydrochloric acid is added to sodium carbonate.
One of the following does not happen during a chemical reaction. This is:
(a) Breaking of old chemical bonds and formation of new chemical bonds
(b) Formation of new substances with entirely different properties
(c) Atoms of one element change into those of another element to form new products.
(d) A rearrangement of atoms takes place to form new products.
A white precipitate can be obtained by adding dilute sulphuric acid to:
(a) CuSO4 solution
(b) Nacl solution
(c) BaCl2 solution
(d) Na2SO4 solution
Write the balanced equation for the following chemical reaction.
\[\ce{Barium chloride + Aluminium sulphate -> Barium sulphate + Aluminium chloride}\]
Write symbolic representation for the following word equation and balance them :
Aluminium + Chlorine → Aluminium chloride.
Balance the following equation:
Ca + N2 → Ca3N2
Why should an equation be balanced? Explain with the help of a simple equation.
Write the balanced chemical equation of the following reaction.
potassium dichromate + sulphuric acid → potassium sulphate + chromium sulphate + water + oxygen.
Match column A with column B.
| Column A | Column B |
| (a) Blue salt changes to white and then black | (i) Ammonium dichromate |
| (b) Orange coloured compound changes to green. | (ii) Iodine |
| (c) Red compound changes to brown and then yellow. | (iii) Zinc Nitrate |
| (d) White to yellow when hot and white when cold. | (iv) Copper sulphate |
| (e) Violet solid changes to violet vapours. | (v) Red Lead |
1 g of copper powder was taken in a China dish and heated. What change takes place on heating? When hydrogen gas is passed over this heated substance, a visible change is seen in it. Give the chemical equations of reactions, the name and the color of the products formed in each case.
Balance the following simple equation:
CO2 + C → CO
Balance the following simple equation:
Ca + H2O → Ca(OH)2 + H2
In the chemical equation the _______ are written on the left-hand side.
What are the steps involved in writing the skeletal equation?
