WorksheetsAlkali metals at a glance.
Total questions: 15
Worksheet time: 15mins
The most reactive element of alkali metals
Li
Na
K
Cs
Which gas is released when halogens react with water?
Hydrogen
Oxygen
Carbon-dioxide
Nitrogen.
Which among the following metals will give a lilac flame?
Na
K
Cs
Fr
Which among the following statement/s is true about alkali metals?
Na is most reactive among all alkali metals.
All group -1 metals react with air to form oxides.
Lithium chloride formula is Li2Cl
Reactivity decreases down the group in alkali metals.
The compounds of group -1 metals dissolve in water to produce...........?
Coloured solutions
Colourless solutions.
Cloudy solutions.
White precipitates.
The reactivity (a) down the group in alkali metals.
When the alkali metals reacts with air, the other type of oxide can be formed with the general formula M2O2 , the name these oxides are (a)
Lithium burns with (a) flame
Sodium burns with (a) flame
The densities of ....................., ........................ and ...................... are less than water.
(a)
The group -1 elements react similar way due to presence of (a) in them
The word equation for the reaction of Li and water is
Lithium+ water --------> Lithium hydroxide+ Hydrogen.
The balanced chemical equation for above reaction is (a)
francium, placed at the bottom of the group is (a) in nature, one of it's radioactive active isotope is produced during radioactive decay of U-235
The metal hydroxides of group-1 metals are highly (a) in nature, so shouldn't touch with bare hands.
The solution formed due to reaction of alkali metals with water turns universal indicator blue this indicate the nature of solution as (a) in nature.
