19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The most electropositive alkali metal is
Hydrogen carbonate of lithium doesn’t exist in solid state due to
On moving top to bottom the negative value of formation …A… for fluoride of alkali metals. Here, A refer to
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 …
Why lithium compound are soluble in organic solvent?
Which of the following metal do not form salt with ethyne?
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
Alkali metals are never found in free state because
The hydration enthalpies of alkali metal ions …A… with increase in ionic sizes. Here, A refer to
Which of the following is/are correct pair(s) regarding diagonally related elements?
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 has the lowest value of hydration enthalpy?
On moving top to bottom among a group the correct trend of hydration enthalpies for alkali metal ions is
The most correct reason for colour of alkali metal ions is
Solubility of sodium chloride in 100 g of water at 273 K is
Potassium is not prepared by Solvay process because …X… is too soluble to be precipitated by addition of ammonium hydrogen carbonate. Here, X refer to
Which of the following exist as decahydrate?
Crude…A… Generally obtained by crystallization of brine solution. Here, A refers to
Which of the following is present as impurity in crude sodium chloride?
The colour of alkali metal ions in any sample can be detected by
Which of the following is known molecular formula of washing soda?
Low solubility of CsI is due to
Which of the following is correct regarding salt of oxo- acids of alkali metals?
Low solubility of LiF in water is due to …A… Here, A refer to