Advertisements
Advertisements
प्रश्न
The aqueous solution of one of the following salts will turn phenolphthalein indicator pink. This salt is:
(a) KCl
(b) K2SO4
(c) K2CO3
(d) KNO3
उत्तर
K2CO3
K2CO3 is formed from a weak acid, carbonic acid (H2CO3), and a strong base, potassium hydroxide (KOH). On hydrolysis, K2CO3 forms more OH- ions than H+ ions, and thus, it is basic. As the aqueous solution of the salt is basic, it turns a phenolphthalein indicator pink.
APPEARS IN
संबंधित प्रश्न
Fill in the following blank:
Rock salt is mined just like ......................
The products of chlor-alkali process are:
(a) NaCl, Cl2 and H2
(b) H2, Cl2 and NaOH
(c) Cl2, Na2CO3 and H2O
(d) NaOH, Cl2 and HCl
The number of molecules of water of crystallisation present in washing soda crystals is:
(a) five
(b) two
(c) ten
(d) seven
Write the name and formula of one salt each which contains:
two molecules of water of crystallisation
Give four substances which contain water of crystallization and write their common name.
Name the anion present in the following compound:
Compound A, when warmed with concentrated sulphuric acid, gives a gas which fumes in moist air and which gives dense white fumes with ammonia.
Distinguish by a chemical test, Sodium carbonate and sodium sulphite.
Acids react with metallic oxides to produce ______.
Name the salt formed when sulphuric acid is added to sodium hydroxide and write its pH.
Select the correct answer from A, B, C, D and E.
A compound which in the aqueous solution state, is neutral in nature.
