19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following is/are correct pair(s) regarding diagonally related elements?
On moving top to bottom among a group the correct trend of hydration enthalpies for alkali metal ions is
Which of the following metal do not form salt with ethyne?
What will be the oxidation state of nitrogen and alkali metal when the nitrogen and alkali metal react with each other?
Among the following element the non-radioactive elements(s) is/are
Along the group atomic and ionic radii are …X… and along the period atomic and ionic radii are …Y… Here, X and Y refer to
Property of the alkaline earth metals that increases with their atomic number
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 …
The most electropositive alkali metal is
In concentrated solution, the colour of alkali metals in liquid ammonia is
Which of he following is/are less soluble in water? LiF, CsI, NaCl, KCl
On moving top to bottom the negative value of formation …A… for fluoride of alkali metals. Here, A refer to
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
The most correct reason for colour of alkali metal ions is
Which of the following ion(s) is/are responsible for biological functions such as maintenance of ion balance and nerve impulse conduction?
Alkali metals are never found in free state because
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…
The colour of alkali metal ions in any sample can be detected by
Why lithium compound are soluble in organic solvent?
[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
Hydrogen carbonate of lithium doesn’t exist in solid state due to
Chemical clinker can be obtained by the reaction of
Choose the incorrect statement among the following.
For the reaction, H PO NaOH NaH PO H O → What is the equivalent weight of H₃PO₂? (mol. wt. is M)