19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
On combustion in excess of air lithium forms mainly …X… sodium forms …Y… while potassium forms …Z…Here, X, Y and Z refer to
Choose the correct statement/statement out of the following (a) f H always became less negative on moving top to bottom for alkali halides (b) f H always becomes less negative from fluoride to iodide for alkali metals
Alkali metal nitrates decomposes to produce …X… while lithium nitrate on heating decomposes to corresponding …Y… Here, Y and Y refer fo
Similarity between lithium and magnesium is particularly stricken and arises because of their
Choose the incorrect statement out of the following
Which of the following is correct regarding salt of oxo- acids of alkali metals?
…A… is used in devising photoelectric cells. Here, A refer to
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 …
When sodium is dissolved in liquid ammonia is solution of deep blue colour is obtained. The colour of solution is due to
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
Lithium halides are somewhat …A… It is because …B… value of polarization capability of lithium ion. Here, A and B refer to
Alkali metals dissolve in liquid ammonia and produces
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 comp…
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
…A… has maximum degree of hydration. Here, A refers to
Which of the following metal salt is mostly hydrated?
Alkali metals readily …X… electron to give monovalent M+ ion. Here, X 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.…
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 increase…
The oxidation state of K in KO₂ is …A… and the bonding type is …B… Here, A and B refer to
Solvay process is used in the preparation of
What will be the product when ammonium chloride is treated with calcium hydroxide?
Magnesium burns in air to produce MgO and …X… with …Y… flame. Here, X and Y refer to
When sodium nitrate is heated above 800° C then (JCECE 2006)
Epsom salt is (RPMT 2010)