HARD
7th CBSE
IMPORTANT
Earn 100
Two salts X and Y are taken in two test tubes A and B, respectively and subjected to heating. Water is added to two test tubes, in case of A salt regains its original colour and in case of B water starts boiling. Then, X and Y may be, respectively:
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Important Questions on Acids, Bases and Salts
MEDIUM
7th CBSE
IMPORTANT
The salt formed by the complete neutralisation of calcium hydroxide with oxy acid of sulphur having four oxygen atoms is:
MEDIUM
7th CBSE
IMPORTANT
Role of nitre in the manufacture of gunpowder is :
MEDIUM
7th CBSE
IMPORTANT
Generally, pickles are stored
MEDIUM
7th CBSE
IMPORTANT
Pure is colourless, however, it gradually becomes yellow on standing due to
EASY
7th CBSE
IMPORTANT
is used in the manufacture of fertilisers. The property exploited in is:
EASY
7th CBSE
IMPORTANT
Weak acid among the following is:
MEDIUM
7th CBSE
IMPORTANT
A salt 'X' has a positive radical in which the metal has electronic configuration . The negative radical is formed from an acid used in soft drinks. One molecule of the salt 'X' reacts with one molecule of a base. Predict the formula of the salt 'X.'
MEDIUM
7th CBSE
IMPORTANT
Which among the following is true regarding the aqueous solution of sulphur trioxide and sodium oxide?
