19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Niobium crystallises in body centred cubic structure. If density is 8.55 g cm-3, then the atomic radius of niobium is (atomic mass of niobium = 93u) (AllMS 2018)
The low melting point of alkali is due to
Match List-I with List-II. List-I List-II
Identify the incorrect statement from the following (NEET 2022)
Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is: (NEET 2021)
The structure of beryllium chloride in solid state and vapour phase, are: (NEET 2021)
HCl was passed through a solution of CaCl2, MgCl2 and NaCl. Which of the following compound(s) crystallise(s)? (NEET 2020)
The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals (NEET 2020)
Which of the following is an amphoteric hydroxide? (NEET 2019)
Crude sodium chloride obtained by crystallisation of brine solution does not contain (Odisha NEET 2019)
Which of the alkali metal chloride (MCl) forms its dihyrate salt (MCl.2H2O) easily? (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 oxides is most acidic in nature? (NEET 2018)
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
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)
Which of the following alkaline earth metal sulphates is least soluble in water? (Haryana PET 2010)
Molecular formula of Glauber’s salt is (JCECE 2010)
Epsom salt is (RPMT 2010)
Gypsum on heating to 390 K gives. (RPMT 2010)