Physical Properties of Group 1 Elements

Which of the following trends decreases down the group in alkali metals?

Which of the following alkali metal has highest melting point?

Assertion $\left(\mathrm{A}\right)$ : Alkali metals are soft and have low melting and boiling points.

Reason $\left(\mathrm{R}\right)$ : This is because interatomic bonds are weak.

The salt of an alkali metal gives yellow colour in the flame test. Also, its aqueous solution gives an insoluble white precipitate with barium chloride in acid medium. The salt is
 

Which of the following property is not a characteristic of alkali metals?

Which of the following elements has the maximum density?

Which of the following property is not a characteristic of alkali metals?

Which of the following elements has the maximum density?

The most stable carbonate is

Which one of the following properties increases on moving down the group from Li to Cs ?

In aqueous solutions, which of the following properties indicates the strong reducing character of lithium?

Alkali metal salt $"\mathrm{X}"$ gives a pale violet colour in flame test $"\mathrm{X}"$ is:

Low solubility of $\mathrm{CsI}$ in water is due to:
 

Which of the following increases in magnitude as the atomic number of alkali metals increases?
 

The hottest region of the Bunsen flame shown in the figure below is: 

Compounds of alkaline earth metals are less soluble in water than the corresponding alkali metal salts due to:

Which of the following will appears silvery-white?

The metallic lustre exhibited by sodium is explained by

Which of the following $\mathrm{s}-$block metals do not impar any colour to the flame

Weak reductant in alkali metal is:-