Advertisements
Advertisements
प्रश्न
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.
उत्तर
A colourless solution of calcium hydroxide in a test tube turns milky on blowing in it through a blow tube for some time.
संबंधित प्रश्न
FILL IN THE BLANK
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
TRUE \ FALSE
Copper can displace iron from iron sulphate.
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
Give reason for the following:
Molybdenum is used in the manufacture of ammonia.
Define:
Photochemical reaction
Give one example
Distinguish by dilute sulphuric acid.
Copper and magnesium?
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
Two chemical species X and Y combine together to form a product P which contains both X and Y
\[\ce{X + Y -> P}\]
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
(iv) P has a fixed composition
State whether the following statements are true or false:
When a candle burns, both physical and chemical changes take place.
Define the following term:
Chemical change
