s-Block Element...

The hydroxide with the least K_sp value at room temperature is

The alkali metals dissolve in liquid ammonia giving deep blue solutions. When they become diamagnetic, the solution turns into

Alkali metal chlorides donot form hydrates except for one metal. Choose from among the options given below.

The metallic luster of sodium is explained by

Lithium has most negative E⁰ value, its reaction with water is less vigorous than that of sodium which has the least negative E⁰ value among the alkali metals. The reason is

The common salt or table salt is

When ammoniacal solution of MgSO₄ is heated with Na₂HPO₄ in the presence of NH₄Cl, a white precipitate of _____ is formed.

2M + 2H₂O →2M⁺+ 2OH⁻+ H₂ What is M?

Highly pure dilute solution of sodium in liquid ammonia

a. shows blue colour
b. exhibits electrical conductivity
c. produces sodium amide
d. produces hydrogen gas

Cs⁺ ion imparts violet colour to the flame. This is due to the fact that the emitted radiations have

In case of alkali metals, the covalent character decreases in the order

The correct order of solubility of the sulphates of alkaline earth metals in water is

Which of the following compounds on thermal decomposition forms basic as well as acidic oxide?

Sodium nitrate decomposes above 800^oC to give

The correct order of increasing ionic character is

The order of solubility of lithium halides in non-polar solvents is

A sodium salt upon heating with MgCI₂ gives a white precipitate. The anion of the sodium salt is

Ba, Sr, Ca and Mg may be arranged in order of decreasing first ionization energy (IE₁) as

Which of the following statements is false?

A metal M readily forms a water soluble sulphate MSO₄, water insoluble hydroxide M(OH)₂ and oxide MO, which becomes inert upon heating. The hydroxide is soluble in NaOH. The metal M is

When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to

All alkali metal halides are soluble in water except

All the compounds listed below will react with water. In which of the following cases is the same gaseous product obtained?

a. Na
b. Na₂O₂
c. KO₂
d. NaH

Lithium halides are somewhat covalent because

What type of ions are present in anhydrous mixture of KF and HF?

Which of the following pairs of elements will respectively give superoxides and peroxides when heated with excess of air?

a. K, Br
b. Na, Rb
c. K, Rb
d. Na, Ba

Choose the correct trend of the melting and boiling points in the alkali metal halides, MF, MCl, MI, MBr.

Which of the following alkali metals forms only normal oxide, M₂O, on heating in air?

A chemical compound 'A' is used to remove temporary hardness from water. It reacts with Na₂CO₃ to generate caustic soda. When CO₂ is bubbled through 'A', it turns cloudy. What is the chemical formula of 'A'?

Washing soda is