Advertisements
Advertisements
प्रश्न
Write true or false :
When potassium iodide solution is added to lead acetate solution a red precipitate is formed.
विकल्प
True
False
Advertisements
उत्तर
False
APPEARS IN
संबंधित प्रश्न
How do the following help in bringing about a chemical change?
light.
How do the following help in bringing about a chemical change?
heat.
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
Fill in the blank
A catalyst either ................or ............... the rate of a chemical change but itself remains ............... at the end of the reaction.
Give reason .
A person suffering from acidity is advised to take an antacid.
TRUE \ FALSE
Copper can displace iron from iron sulphate.
What are homogenous reactions ?
Fill in the blank:
The substances which undergo chemical change are called _______
Name the type of chemical reaction shown by the following equation:
2Mg + O2 → 2MgO
Complete and balance the following reaction:
\[\ce{CuCO3 ->[\Delta]}\]
Name the gases which turn moist red litmus blue.
Give a chemical test to distinguish between the following gases.
SO2 and Cl2
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium chloride
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
What happens when cane sugar is strongly heated? Mention any two changes in it.
______ is not a chemical change.
The water we drink is a combination of hydrogen and oxygen.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Are these changes chemical in nature?
Write a note on the catalyst.
