Advertisements
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
The chemical name of baking soda is ______.
Changes in which new substances are formed are called ______ changes.
Fill in the blank
A catalyst either ................or ............... the rate of a chemical change but itself remains ............... at the end of the reaction.
Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.
\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
FILL IN THE BLANK
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
FILL IN THE BLANK
Positively charged ions are called ........
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
Is kerosene an electrolyte or a non-electrolyte ?
Fill in the blank
A new substance is formed in a _______ change.
A chemical equation is a statement that describes a chemical change in terms of
Give an example of a reaction where the following are involved
Heat
Define Photochemical reaction
Give an example
Write the chemical reaction where the following changes are observed.
Colour change is noticed
Multiple choice:
Thermal decomposition of sodium carbonate will produce
What do you observe when H2S is passed through a lead nitrate solution.
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to sodium sulphite.
Burning of paper is a ______ change.
Write a note on the following:
Fermentation
______ is the chemical name of limestone.