19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
What will be the oxidation state of nitrogen and alkali metal when the nitrogen and alkali metal react with each other?
Hydrogen carbonate of lithium doesn’t exist in solid state due to
On moving top to bottom among a group the correct trend of hydration enthalpies for alkali metal ions is
[X] and [Y] are two nitrates of alkali metals [X] and [Y] on decomposition produces oxides and nitrites respectively. Here, [X] and [Y] refer to
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 in…
Which of the following is/are correct pair(s) regarding diagonally related elements?
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 …
Group I elements are collectively known as
Which of the alkali metal chloride (MCl) forms its dihyrate salt (MCl.2H₂O) easily? (Odisha NEET 2019)
Crude sodium chloride obtained by crystallisation of brine solution does not contain (Odisha NEET 2019)
Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s2 2s2 2p3, the simplest formula for this compound is (NEET 2018)
Which of the following is an amphoteric hydroxide? (NEET 2019)
Which of the following compounds has the lowest melting point? (AIPMT 2011)
In context with beryllium, which one of the following statements is incorrect? (NEET 2016)
Among CaH₂, BeH₂, BaH₂, the order of ionic character is (NEET 2018) (a) CaH BeH BaH (b) BeH BaH CaH (c) BeH CaH BaH (d) BaH BeH CaH
HCl was passed through a solution of CaCl₂, MgCl₂ and NaCl. Which of the following compound(s) crystallise(s)? (NEET 2020)
Molecular formula of Glauber’s salt is (JCECE 2010)
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)
Identify the incorrect statement from the following (NEET 2022)
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
Which of the following is present as impurity in crude sodium chloride?
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
Beryllium and magnesium do not impart any colour to the flame test. The reason is that
Match List-I with List-II. List-I List-II