Advertisements
Advertisements
Question
______ gas causes tears in our eyes while cutting onions.
Advertisements
Solution
Propanethial s-oxide gas causes tears in our eyes while cutting onions.
APPEARS IN
RELATED QUESTIONS
How do the following help in bringing about a chemical change?
heat.
Give a reason.
Wasp sting is treated with vinegar.
FILL IN THE BLANK
On reaction with sulphuric acid solution, barium chloride forms a white precipitate of ........ sulphate.
Explain the type of reactions on the basis of the direction of reaction.
Write a short note on the information derived from a balanced chemical equation.
What do you observe when :
an iron nail is kept in tap water for few days
Fill in the blank:
The substances formed as a result of a chemical reaction are called _______
Write the chemical reaction where the following changes are observed.
Gas is evolved
State the type of reactions for the following represent and balance the ones that are not balanced.
NaOH + HCl → NaCl + H2O
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
Select the correct answer for the following options:
The gas which reacts with oxygen to give a neutral liquid.
Complete the table given below.
| Heat on iodine crystals | Colour of vapours evolved |
Complete the table given below.
| Heat on Zinc nitrate | Colour of residue |
Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.
State the following reaction represent oxidation or reduction.
\[\ce{Al->Al+++}\]
The chemical change is ______.
True or False. If false, give the correct answer.
Taking a glass of water and freezing it by placing it in the freezer is a chemical change.
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?
Water boiling into water vapour is an example of chemical change.
Acid rain is a result of ______.
