19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which type of 'defect' has the presence of cations in the interstitial sites ?
In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is
‘A’ is an important constituent of cement which is responsible for setting of cement. What is the number of water of crystallization present in ‘A’?
Choose the incorrect statement among the following.
Which one of the following has magnesium?
The correct reason for smaller size of alkaline earth metal than that of alkali metal is that
Which of the following order is correct regarding electropositive character of alkaline earth metals?
Assertion (A): Ba, Ca and Sr produces individual characteristic colour to flame test. Reason (R): this is due to excitation of loosely held electrons from outermost orbit to excited state of orbital.
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 metal do not form salt with ethyne?
[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
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 …
Why lithium compound are soluble in organic solvent?
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
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
Alkali metals are generally silvery white but beryllium and magnesium appears to be
Chemical clinker can be obtained by the reaction of
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
Match the Column I and Column II according to element and their characteristics colours, appears in flame test and select the correct option from the codes given below. Column I Column II A. Ca 1. Apples green B. Sr 2…
Which of he following is/are less soluble in water? LiF, CsI, NaCl, KCl
What will be the oxidation state of nitrogen and alkali metal when the nitrogen and alkali metal react with each other?
In concentrated solution, the colour of alkali metals in liquid ammonia is