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प्रश्न
Name: A brown gas
उत्तर
Nitrogen dioxide
NO2
APPEARS IN
संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Iron pipes coated with zinc do not get rusted easily.
Complete and balance the following chemical equations
Na + H2 O →
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
A chemical equation is a statement that describes a chemical change in terms of
State four conditions necessary for a chemical reaction to take place.
State what you would observe when the following substance is heated in a glass test tube red lead.
Explain by writing a word equation.
Limestone powder disappears on adding to dilute hydrochloric acids.
What do you observe? When
Water is added to the quick lime.
Distinguish by dilute sulphuric acid.
Copper and magnesium?
Represent the addition of dilute sulphuric acid to zinc by means of a chemical equation. State the function of the arrow between the reactants and products.
Give a word equation for the following reaction.
A salt which reacts with ammonium hydroxide to give a reddish brown precipitate.
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
The percentage composition of Nitrogen in Ureas is ______.
The water we drink is a combination of hydrogen and oxygen.
Classify each of the following, as a physical or a chemical change. Give reasons.
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change the colour of black tea by adding lemon juice to it.
(e) Churning of milk cream to get butter.
Write word equations for two chemical reactions with the help of materials given in the box.
Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water
Write a note on the following:
Curdling of milk
Acid rain is a result of ______.
