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प्रश्न
Fill in the blank:
The substances formed as a result of a chemical reaction are called _______
उत्तर
The substances formed as a result of a chemical reaction are called products .
APPEARS IN
संबंधित प्रश्न
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In a double decomposition precipitation reaction both the reactants must be ............ soluble.
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........... electrolytes dissociate completely in aqueous state and allow large amount of electricity to flow through it.
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The new substances formed during a chemical reaction are called the ..................
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Positively charged ions are called ........
TRUE \ FALSE
Electrolytic refining is a method in which a thin coating of a metal is done over another metal.
How is precipitate formation in a chemical reaction indicated?
Explain the type of reactions on the basis of the direction of reaction.
Define chemical reaction.
Name the type of chemical reaction shown by the following equation:
Fe + CuSO4 → FeSO4 + Cu
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Water
Give an example of the following chemical change.
Two gases combine to form white solid
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
State the type of reactions for the following represent and balance the ones that are not balanced.
Cl2 + 2KBr → 2KCl + Br2
What do you understand by 'chemical reaction'?
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Addition of water to quicklime.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A coloured substance which leaves on strong heating a black residue and evolves two colourless gases one of which is acidic and the other neutral.
Complete the table given below.
| Heat on copper carbonate | Test for gas evolved |
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
What kind of a change is associated with decaying of a plants?
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
_____ is the basic material to manufacture urea.
The changes in which new substance with new chemical properties are formed are ______.
Write some materials prepared by chemical changes.
Rusting of iron is ______.
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
Write the chemical reaction of baking soda with lemon.
Write the equation for the process of formation of rust.
