Advertisements
Advertisements
प्रश्न
What do you observe when Cobalt chloride paper is introduced in water vapour.
Advertisements
उत्तर
It turns blue cobalt chloride paper pink.
\[\ce{\underset{\text{Blue}}{CoCl2} + 2H2O -> \underset{\text{(Pink)}}{CoCl2.2H2O}}\]
APPEARS IN
संबंधित प्रश्न
Changes in which new substances are formed are called ______ changes.
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
FILL IN THE BLANK
In a ............ change, new substances are formed.
A solution of a substance ‘X’ is used for white washing Name the substance ‘X’ and write its formula.
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)
A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.
What is a chemical reaction?
Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.
How would you show that the settling of curd is a chemical change?
______ is the chemical name of slaked lime.
What is the difference between reactants and products?
