19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Choose the incorrect statement among the following.
The most electropositive alkali metal is
Which of the following statement(s) is/are incorrect regarding property of alkali metals? I. Alkali metal on reaction with water produces a gas as a byproduct which burns with poping sound. II. Alkali metals dissolve …
In concentrated solution, the colour of alkali metals in liquid ammonia is
What will be the oxidation state of nitrogen and alkali metal when the nitrogen and alkali metal react with each other?
The colour of alkali metal ions in any sample can be detected by
The most correct reason for colour of alkali metal ions is
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
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)