Advertisements
Advertisements
प्रश्न
When hydrogen is passed over copper oxide, copper and steam are formed. Write a balanced equation for this reaction and state which of the chemicals are non-metals.
उत्तर
The balanced equation for the reaction of hydrogen gas and copper oxide is written as follows:
H2 (g) + CuO (s) →Cu (s) + H2O (g)
Non-metals: H2 is a the non-metal.
APPEARS IN
संबंधित प्रश्न
2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed, a gas evolves which is bubbled through a soap solution before testing. Write the equation of the chemical reaction involved and the test to detect the gas. Name the gas which will be evolved when the same metal reacts with dilute solution of a strong acid.
Correct and balance the following equation:
N + H NH3
You are given the solution of lead nitrate. In order to obtain a yellow precipitate you should mix with it a solution of:
(a) potassium chloride
(b) potassium nitride
(c) potassium sulphide
(d) potassium iodide
Balance the following equation. Also name the product formed.
`"H"_2 +"CI"_2 → "HCI"`
To determine the percentage of water absorbed by raisins, raisins are soaked in water for:
Write word equation for the following molecular equation:
\[\ce{N2 + 3H2 ⇌[Fe - 450°C][200 atoms] 2NH3 + \triangle}\]
Word equation:
State why [+ Δ] indication is seen after NH3.
State what 200 atmospheres – indicates.
State the function of Fe in the above reaction.
Give reason for the following:
Silver salts are kept in dark coloured bottles.
Write a balanced equation for the following word equation:
Potassium nitrate → Potassium nitrite + Oxygen
When aqueous solutions of potassium iodide and lead nitrate are mixed an insoluble substance separates out. The chemical equation for the reaction involved is:
Why should a magnesium ribbon be cleaned before burning in air?