The atomic numbers of four elements are given below. Which is an alkaline earth metal?
10
20
30
40
When CO2 is bubbled into an aqueous solution of Na2CO3, the following is formed
H2O
OH-
NaHCO3
NaOH
Which alkaline earth metal is the most abundant in the earth crust?
Mg
Ca
Sr
Ba
Milk of lime is
CaCO3
CaHCO3
Ca(OH)2
CaSO4 2H2O
A gas reacts with CaO and not with NaHCO3 is
CO2
Cl2
O2
N2
The most homogeneous family in periodic table is
Alkali metals
Alkaline earth metal
Volatile metals
Coinage metals
Chlorophyll contains
Na
K
Mn
Which alkali metal react with nitrogen to form nitrides?
Li
Cs
Al
Most reactive among the following is
Which gives apple gives green colour in fire works?
