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प्रश्न
What do you observe? When
Water is added to the quick lime.
उत्तर
Quick lime reacts vigorously with water to produce slaked lime, i.e. calcium hydroxide.
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संबंधित प्रश्न
Complete and balance the following chemical equations:
Fe `"SO"_4` + NaOH `→`
(aq.) (aq.)
Write the missing reactants and products and balance the equations.
................+ HCI `→` NaCI + `"H"_2"O"` + .........................
FILL IN THE BLANK
On reaction with sulphuric acid solution, barium chloride forms a white precipitate of ........ sulphate.
Name three reducing agents ?
Fill in the blank
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A chemical equation is a statement that describes a chemical change in terms of
State what you would observe when the following substance is heated in a glass test tube red lead.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
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The white particles of baking soda disappear when put in lemon juice. This means that it is a ______ change.
Choose the correct option from the bracket and explain the statement giving reason.
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State the conditions necessary for a chemical change or reaction.
Multiple choice:
A reaction of a type: AB + CD → AD + CD, involves
What do you observe? When
Sodium chloride solution is added to silver nitrate solution.
What do you observe when H2S is passed through a lead nitrate solution.
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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 whether the following reaction is oxidation or reduction.
\[\ce{Na->Na+}\]
Select the correct answer from the options given below:
State the gaseous product formed, when
An active metal reacts with dilute sulphuric acid.
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Chemical change is a temporary change.
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(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood
