19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Lithium and magnesium oxides and hydroxides are …X… soluble in water. Here, X refers to
Similarity between lithium and magnesium is particularly stricken and arises because of their
Alkali metal nitrates decomposes to produce …X… while lithium nitrate on heating decomposes to corresponding …Y… Here, Y and Y refer fo
Choose the correct statements (s) regarding lithium and alkali metals I. Lithium is much harder. Its m.p and b.p are higher than other alkali metals. II. Lithium is highly reactive and strongest reducing agent in com…
Anomalous behavior of lithium is due to I. exceptionally small size of its atom II. High polarizing power. III. High Charge Radius ratio. Choose the correct option
Match the Column I and Column II and choose the correct option from the codes give below. Column I Column II A. Potassium 1. Soft soap B. Potassium chloride 2. Fertilizer C. Potassium hydroxide 3. Photoelectric cells …
…A… is used in devising photoelectric cells. Here, A refer to
…A…is used in the manufacturing of soft soap. Here, A refer to
Which of the following metal is used to form useful alloys?
When sodium is dissolved in liquid ammonia is solution of deep blue colour is obtained. The colour of solution is due to
Alkali metals dissolve in liquid ammonia and produces
Which of the following is correct metals regarding least and most powerful reducing agent among alkali metals?
Which of the following metal has high value of polarization?
Lithium halides are somewhat …A… It is because …B… value of polarization capability of lithium ion. Here, A and B refer to
The nature of bonding in hydride of alkali metal is
Alkali metal reacts with water vigorously to form hydroxides and dihydrogen. Which of the following alkali metals reacts with water least vigorously?
The oxidation state of K in KO2 is …A… and the bonding type is …B… Here, A and B refer to
Alkali metals are kept in kerosene oil. Which of the following reason (s) is/are correct regarding this statements?
Which of the following elements(s) form stable superoxide?
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 element(s) is used as useful electrode(s) in photoelectric cells?
Alkali metals can be detected by their respective …A… Here, A refer to
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.…
The alkali metals and their salts show characteristics colour to
The low melting point of alkali is due to