Advertisements
Advertisements
प्रश्न
Complete the statement given below by filling in the blanks with the correct words.
Atoms contain ________ with positively charged ________.
उत्तर
Atoms contains nucleus with positively charged protons.
APPEARS IN
संबंधित प्रश्न
In a reaction, 5.3 g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass.
Sodium carbonate + acetic acid → sodium acetate + carbon dioxide + water
Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?
Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass?
State the law of conversation of mass.
What do you observe when, barium chloride solution is mixed with sodium sulphate solution ?
What is mass ?
If an object weighs 6 kg on earth. What will be its weight on moon ?
If an object is taken to the moon from the earth what will be its mass ?
Give reason for the following.
Electricity is not considered matter.
Fill in the blank:
Matter is anything that has............. and occupies .............
Name the law of chemical combination which was given by Proust.
‘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 ?
State the law of conservation of mass. Give one example to illustrate this law.
Which postulate of Dalton's atomic theory can explain the law of conservation of mass ?
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.
Potassium chlorate decomposes, on heating, to form potassium chloride and oxygen. When 24.5 g of potassium chlorate is decomposed completely, then 14.9 g of potassium chloride is formed. Calculate the mass of oxygen formed. Which law of chemical combination have you used in solving this problem ?
State the main points of Landolt’s experiment for experimental evidence of the law.
The chemical symbol for nitrogen gas is
