Advertisements
Advertisements
प्रश्न
State the main points of Landolt’s experiment for experimental evidence of the law.
Advertisements
उत्तर
Main points of Landolt's experiment
- In an 'H' shaped tube, as shown in the figure, Landolt introduced a solution of sodium chloride \[\ce{[NaCl]}\] and silver nitrate \[\ce{[AgNO3]}\] in the limbs of the tube and sealed it and weighed it.
- The solutions were mixed by shaking to obtain a white precipitate of silver chloride.
- The tube was again weighed after the experiment.
Result: Weight of H tube + reactants = Weight of H tube + products.
Hence, the total mass of reactants = total mass of products
APPEARS IN
संबंधित प्रश्न
State the law of conversation of mass.
What do you observe when, barium chloride solution is mixed with sodium sulphate solution ?
When magnesium is burnt in air, there is an increase in mass after the reaction.
Give reason for the following.
Electricity is not considered matter.
Fill in the blank:
Matter is anything that has............. and occupies .............
‘If 100 grams of calcium carbonate (whether in the form of marble or chalk) are decomposed completely, then 56 grams of calcium oxide and 44 grams of carbon dioxide are obtained’. Which law of chemical combination is illustrated by this statement ?
Copper sulphate reacts with sodium hydroxide to form a blue precipitate of copper hydroxide and sodium
sulphate. In an experiment, 15.95 g of copper sulphate reacted with 8.0 g of sodium hydroxide to form
9.75 g of copper hydroxide and 14.2 g of sodium sulphate. Which law of chemical combination is illustrated by this data ? Give reason for your choice.
Complete the statement given below by filling in the blanks with the correct words.
Atoms contain ________ with positively charged ________.
Select the correct answer from A, B, C, D & E for the statement given below:
In Landolt’s experiment – the form in which the chemical energy stored up in the reactants __________ is released.
Select the correct answer from A, B, C, D & E for the statement given below:
The process of change of a liquid into vapour, [gas] on heating.
Complete the statement by filling the blank with the correct word given below.
The law of conservation of mass is strictly valid if mass and _________ are considered together.
Match the following.
| Law of conservation of mass | Sir William Crookes |
| Law of constant proportion | James Chadwick |
| Cathode rays | Joseph Proust |
| Anode rays | Lavoisier |
| Neutrons | Goldstein |
The chemical symbol for nitrogen gas is ______.
