19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following does not belong to alkaline earth metal?
Among the alkali metals …A and …B… are relatively more abundant in nature. Here A and B refer to
Group II elements with exceptions of beryllium are known as alkaline earth metals. These are so called because their …A…and …B… are alkaline in nature. Here, A and B refer to
Group I elements are collectively known as
s-subshell can accommodate maximum number of
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts is put under an electric field? (NEET 2017)
Which of the following element(s) is used as useful electrode(s) in photoelectric cells?
Choose the correct statements(s) among the following. I. Alkali metal is highly reactive. II. Alkali metal has lowest ionization enthalpy among their respective period. III. Ionization energy of alkali metals incre…
Which of the following elements(s) form stable superoxide?
Alkali metals are kept in kerosene oil. Which of the following reason (s) is/are correct regarding this statements?
The oxidation state of K in KO2 is …A… and the bonding type is …B… Here, A and B refer to
Alkali metal reacts with water vigorously to form hydroxides and dihydrogen. Which of the following alkali metals reacts with water least vigorously?
The nature of bonding in hydride of alkali metal is
Lithium halides are somewhat …A… It is because …B… value of polarization capability of lithium ion. Here, A and B refer to
Which of the following metal has high value of polarization?
On combustion in excess of air lithium forms mainly …X… sodium forms …Y… while potassium forms …Z…Here, X, Y and Z refer to
Sodium …X… is widely used as a/an …Y…. Here, X and Y refer to
The alkali metal oxides dissolve in water to produce
The carbonates and hydrogen carbonates of alkali metals are highly stable, their stability
Lithium being very small in size, which …A… a large CO ion leading to the formation of more stable …B.. and …C.. Here A, B and C refer to
Solvay process is used in the preparation of
What will be the product when ammonium chloride is treated with calcium hydroxide?
Choose the correct option from the codes given below regarding elements and their characteristics colour given in Column I and II of the following table. Column I Column II A. Li 1. Crimson red B. Na 2. Yellow C. K 3.…
Potassium is not prepared by Solvay process because …X… is too soluble to be precipitated by addition of ammonium hydrogen carbonate. Here, X refer to
Which of the following is known molecular formula of washing soda?