Advertisements
Advertisements
प्रश्न
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium chloride
उत्तर
When ammonium chloride is heated White crystalline solid, on strong heating, sublimates to form a basic gas (NH3) and an acidic gas (HCl)
\[\ce{NH4Cl ⇌[Heat][Cool] NH3↑ + HCl↑}\]
APPEARS IN
संबंधित प्रश्न
The chemical name of baking soda is ______.
Name three biochemical catalysts found in the human body.
Complete and balance the following chemical equations:
\[\ce{Pb(NO3)2->[heat]}\] _________
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
Define chemical reaction.
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
Give an example of a reaction where the following are involved:
Close contact
Multiple choice:
A reaction of a type: AB + CD → AD + CD, involves
What do you understand by 'chemical reaction'?
Give an example of the following chemical changes.
A reaction involving
(i) Change of state
(ii) formation of precipitate
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 balanced equation for the following conversion affected by heat alone on the substance:
Hydrated copper sulphate to sulphur dioxide
Complete the table given below.
| Addition of dil. H2SO4 to zinc | Test for gas evolved |
Burning of paper is a ______ change.
What is the role of a catalyst in a chemical reaction?
A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. Can the change in POP be reversed?
A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?
______ is a natural indicator.
Give an example where heat, light, and sound are produced during a chemical change.
Define the following term:
Chemical change
