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प्रश्न
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
उत्तर
\[\ce{2KClO3 ->[heat] 2KCl + 3O2}\]
APPEARS IN
संबंधित प्रश्न
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder, it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A), then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.
Define catalyst.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer
Which of the following is a reducing agent?
- oxygen
- chlorine
- hydrogen
- none of these
TRUE \ FALSE
Positively charged electrode is called the anode. True or false ?
How is precipitate formation in a chemical reaction indicated?
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 _______
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
Write true or false :
When potassium iodide solution is added to lead acetate solution a red precipitate is formed.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
Oxygen is a ______ in respiration.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
Electron ______ is complete in each hydrogen in a hydrogen molecule.
Write the chemical reaction where the following changes are observed.
Gas is evolved
What do you understand by 'chemical reaction'?
What do you observe? When
Sodium chloride solution is added to silver nitrate solution.
Define:
Electrochemical reaction
Give one example
Name: A brown gas
State the following reaction represent oxidation or reduction.
\[\ce{Fe++->Fe+++}\]
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
Chemists identify gypsum as a natural indicator.
Classify each of the following, as a physical or a chemical change. Give reasons.
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change the colour of black tea by adding lemon juice to it.
(e) Churning of milk cream to get butter.
Vanaspati is obtained from vegetable oils by the addition of ______ to the oils.
______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.
The chemical name of baking soda is sodium bicarbonate.
Is the conversion of milk into ice cream a chemical change?
Write a note on the following:
Curdling of milk
______ is the chemical name of limestone.
