Advertisements
Advertisements
प्रश्न
Write your observation and name the product when zinc reacts with dilute hydrochloric acid.
उत्तर
When zinc pieces are added to hydrochloric acid, zinc displaces hydrogen. As a result, zinc chloride and hydrogen gas are produced.
APPEARS IN
संबंधित प्रश्न
Balance the following chemical equation :
Na2CO3 + HCl → NaCI + H2O + CO2
Write your observation for the following chemical reaction and name the product formed :
When dilute acetic acid is poured on baking soda.
Write symbolic representation for the following word equation and balance them :
Calcium carbonate → Calcium oxide + Carbon dioxide.
Write the answer to the following.
Explain the similarity and difference in two events, namely adding NaOH to water and adding CaO to water.
Write the balanced chemical equation of the following reaction.
zinc sulphide + oxygen → zinc oxide + sulphur dioxide
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 |
An element X is trivalent. Write the balanced equation for the combustion of X in oxygen.
\[\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}\]
State why the compound MnO2 is written above the arrow.
Write a balanced equation for the following word equation:
Potassium nitrate → Potassium nitrite + Oxygen
To balance the following chemical equation the value of x and y should respectively be:
\[\ce{2NaOH + xAl_2O_3->yNaAlO_2 + H_2O}\]