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प्रश्न
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
उत्तर
| Copper sulphate | Copper carbonate | |
| Residue left | Anhydrous(CuSO4) | Copper oxide(CuO) |
| Colour of residue | The colour of the residue is Dirty white. | The colour is black solid. |
| Gas produced | Water vapour (H2O) is produced. | Carbon dioxide(Co2) is produced. |
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations
Na + H2 O →
Complete and balance the following chemical equations:
\[\ce{Pb(NO3)2->[heat]}\] _________
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
What do you observe when Iron nail is kept in copper sulphate solution for sometime.
FILL IN THE BLANK
In a ............ change, new substances are formed.
Write true or false :
Hydrogen sulphide has rotten egg smell .
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Explain by writing a word equation.
Limestone powder disappears on adding to dilute hydrochloric acids.
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
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State the type of reactions for the following represent and balance the ones that are not balanced.
Cl2 + 2KBr → 2KCl + Br2
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Sodium sulphide and sodium sulphite?
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- 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 dilute acid to an active metal.
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Lead nitrate.
When lithium metal is placed in hydrochloric acid, _______ gas is evolved.
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Which of the following are chemical changes?
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
Galvanization is a process in which ______ is coated as a layer of iron.
We are advised to not to play with fireworks. Give reason.
