Advertisements
Advertisements
Question
Give one example that illustrates the following characteristics of a chemical reaction:
Change in state
Advertisements
Solution
The reaction between hydrogen sulphide and chlorine (both gases) produces sulphur (solid) and hydrogen chloride (gas).
\[\ce{\underset{Hydrogen sulphide}{H2S_{(g)}} + \underset{Chlorine}{Cl2_{(g)}}-> \underset{Hydrogen chloride}{2HCl_{(g)}} + \underset{(yellow solid)}{\underset{Sulphur}{S_{(s)}}}}\]
APPEARS IN
RELATED QUESTIONS
The chemical name of baking soda is ______.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Which one of the following alters the rate of the chemical reaction without itself undergoing any change?
- temperature and Pressure
- concentration of reactants
- presence of catalyst
- none of these
FILL IN THE BLANK
In a ............ change, new substances are formed.
How is precipitate formation in a chemical reaction indicated?
State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Potassium fluoride
Give an example of the following chemical change.
Two solids combine to form a liquid
State the type of reactions for the following represent and balance the ones that are not balanced.
Cl2 + 2KBr → 2KCl + Br2
Name: Gas with rotten egg smell.
What do you observe when HCI is passed through a silver nitrate solution.
Give a word equation for the following reaction.
Two gases which combine to give a solid.
Give a word equation for the following reaction.
A compound which on heating shows – colour change from brown to yellow.
Give balanced equation for the following conversion affected by heat alone on the substance:
Copper carbonate to copper oxide
Complete the table given below.
| Addition of dil. H2SO4 to FeS | Odour of gas evolved |
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
NPK are the primary nutrients for plants.
What is the role of a catalyst in a chemical reaction?
The water we drink is a combination of hydrogen and oxygen.
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 |
Acid rain is a result of ______.
