19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following is non-crystalline solid
Which is not a property of solids
Chemical clinker can be obtained by the reaction of
A chemical (A) is used for the preparation of washing soda to recover ammonia. When CO2 is bubbled through an aqueous solution of A, the solution turns milky. It is used white washing due to disinfectant nature. What …
Property of the alkaline earth metals that increases with their atomic number
Which one of the following has magnesium?
Assertion (A): Ba, Ca and Sr produces individual characteristic colour to flame test. Reason (R): this is due to excitation of loosely held electrons from outermost orbit to excited state of orbital.
On moving top to bottom among a group the correct trend of hydration enthalpies for alkali metal ions is
Which of the following has the lowest value of hydration enthalpy?
The hydration enthalpies of alkali metal ions …A… with increase in ionic sizes. Here, A refer to
Alkali metals are never found in free state because
Which of the following ion(s) is/are responsible for biological functions such as maintenance of ion balance and nerve impulse conduction?
Which of the following is/are correct pair(s) regarding diagonally related elements?
Which of the following statements(s) is/are incorrect regarding the s-block elements? I. Francium is highly radioactive element. II. Oxides and hydroxides of alkali metals and alkaline earth metals are not alkaline i…
Among the following element the non-radioactive elements(s) is/are
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)
The suspension of slaked lime in water is (NEET 2016)
In context with beryllium, which one of the following statements is incorrect? (NEET 2016)
Solubility of the alkaline earth metal sulphates in water decreases in the sequence (AIPMT 2015)
Which one of the alkali metals forms only, the normal oxide, M2O on heating in air? (AIPMT 2012)
Which of the following compounds has the lowest melting point? (AIPMT 2011)
Which one of the following is present an an active ingredient in bleaching powder for bleaching action? (AIPMT 2011)
For alkali metals, which one of the following trends is incorrect? (KCET 2010)
Correct order of stability of group IIA metal carbonates is (OJEE 2009)
Among the following, the least thermally stable is (J & K CET 2009)