19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Alkali metals readily …X… electron to give monovalent M+ ion. Here, X refer to
The oxidation state of K in KO₂ is …A… and the bonding type is …B… Here, A and B refer to
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 alkaline earth metal sulphates is least soluble in water? (Haryana PET 2010)
Which one of the following is present an an active ingredient in bleaching powder for bleaching action? (AIPMT 2011)
Melting and boiling point of the alkaline earth metal are …X… than the corresponding alkali metal due to …Y… sizes. Here, X and Y refer to s-BLOCK
Equimolar solution of the following were prepared in water separately. Which one of the solutions will record the highest pH? (AIPMT 2008)
The correct order of stability for the following superoxides is (EAMCET 2008)
When sodium nitrate is heated above 800° C then (JCECE 2006)
Lower melting point chloride is (JCECE 2006)
Magnesium burns in air to produce MgO and …X… with …Y… flame. Here, X and Y refer to
Consider the following abbreviations for hydrated What is the correct order of size of these hydrated alkali ions? n n n x Li H O , y Na H O ,z K H O (J & K CET 2006)
Alkaline earth metals are …X… than that of alkali metals. Here, X refer to
Match the Column I and Column II according to element and their characteristics colours, appears in flame test and select the correct option from the codes given below. Column I Column II A. Ca 1. Apples green B. Sr 2…
Powder of beryllium burns in air frequently to produce
In which of the following the hydration energy is higher than the lattice energy? (CBSE AIPMT 2007)
The atomic and ionic radii of the alkaline earth metals are …A… than those of the corresponding alkali metals in the corresponding period Here, A refers to
Which of the following is correctly order regarding hydration enthalpies of alkaline earth metals?
Which of the following is correctly represented according to their existence? I. MgCl₂ .6H₂O II. NaCl. 6H₂O III. KCl. 6H₂O IV. CaCl₂. 6H₂O
The alkali metals from salt-like hydride by the direct synthesis at elevated tempeature. The thermal stability of these hydrides decreases in which of the following orders? (AIPMT 2008)
Which of the following on thermal decomposition yields a basic as well as an acidic oxide? (Kerala CEE 2008)
The solubilities of carbonates decrease down the magnesium group due to a decrease in (RPMT 2008)
Which of the following oxides is not expected to react with sodium hydroxide? (CBSE AIPMT 2009)
Which of the following will give H₂ gas with dilute HNO₃? (CPMT 2009)
Beryllium and magnesium do not impart any colour to the flame test. The reason is that