Advertisements
Advertisements
Question
Metals form basic hydroxides. Which of the following metal hydroxide is the least basic?
Options
Mg(OH)2
Ca(OH)2
Sr(OH)2
Ba(OH)2
Advertisements
Solution
Mg(OH)2
Explanation:
As the ionization enthalpy increases from Mg →Ba, the M – O bond becomes weaker and weaker down the group and hence basicity increases down the group. Thus, Mg(OH)2 is least basic.
APPEARS IN
RELATED QUESTIONS
What are the common chemical features of alkali metals?
When an alkali metal dissolves in liquid ammonia the solution can acquire different colours. Explain the reasons for this type of colour change.
Which of the alkali metal is having least melting point?
What are the common physical features of alkali metals?
The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room temperature rises to 30°C?
Alkali metals react with water vigorously to form hydroxides and dihydrogen. Which of the following alkali metals reacts with water least vigorously?
The solubility of metal halides depends on their nature, lattice enthalpy and hydration enthalpy of the individual ions. Amongst fluorides of alkali metals, the lowest solubility of LiF in water is due to ______.
Which of the following elements does not form hydride by direct heating with dihydrogen?
Choose the correct statements from the following.
(i) Beryllium is not readily attacked by acids because of the presence of an oxide film on the surface of the metal.
(ii) Beryllium sulphate is readily soluble in water as the greater hydration enthalpy of Be2+ overcomes the lattice enthalpy factor.
(iii) Beryllium exhibits coordination number more than four.
(iv) Beryllium oxide is purely acidic in nature.
When heated in air, the alkali metals form various oxides. Mention the oxides formed by Li, Na and K.
The stability of peroxide and superoxide of alkali metals increase as we go down the group. Explain giving reason.
The ease of absorption of the hydrated alkali metals ions in an ion-exchange resin follows the order:
The metal mainly used in devising photoelectric cells is ______.
The correct order of hydration enthapies of alkali metal ions is ______.
Alkali metals are powerful reducing agents because ______.
