19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
In a crystalline solid, having formula XY₂O₄, oxide ions are arranged in cubic close packed lattice while, cations X are present in tetrahedral voids and cations Y are present in octahedral voids. The percentage of te…
A solid has a structure in which W atoms are located at the corners of a cubic lattice. O atoms at the centre of edges and Na atom at centre of the cube. The formula for the compound is (AllMS 2018) (a) NaWO (b) NaWO …
Number of unit cells in 4 g of X (atomic mass=40). Which crystallises in bcc pattern is (NA=Avogadro number)
The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its coordination number is
Which of the following is an example of network solid? (AIIMS 2018) (a) SO Solid (b) 2I
Those substances which show permanent magnetism even in the absence of magnetic field are called
Solid SO₂ and NH₃ are the examples of which of the following types of solids? (CBSE 2018)
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)
Total volume of atoms present in a face centred cubic unit cell of a metal is (r = radius of atom) (a) r (b) r (c) r (d) r
Which is not a property of solids
Amorphous substances show (1) Short and long range order (2) Short range order (3) Long range order (4) Have no sharp M.P.
Amorphous solids are
Crystalline solid is
Which of the following metal salt is mostly hydrated?
Choose the correct option from the codes given below regarding elements and their characteristics colour given in Column I and II of the following table. Column I Column II A. Li 1. Crimson red B. Na 2. Yellow C. K 3.…
…A… has maximum degree of hydration. Here, A refers to
Choose the correct statements(s) among the following. I. Alkali metal is highly reactive. II. Alkali metal has lowest ionization enthalpy among their respective period. III. Ionization energy of alkali metals increase…
Which of the following is not an alkaline earth metal?
Alkali metals readily …X… electron to give monovalent M+ ion. Here, X refer to
The oxidation state of K in KO₂ is …A… and the bonding type is …B… Here, A and B refer to
Lithium halides are somewhat …A… It is because …B… value of polarization capability of lithium ion. Here, A and B refer to
Alkali metals dissolve in liquid ammonia and produces
When sodium is dissolved in liquid ammonia is solution of deep blue colour is obtained. The colour of solution is due to
…A… is used in devising photoelectric cells. Here, A refer to
Match the Column I and Column II and choose the correct option from the codes give below. Column I Column II A. Potassium 1. Soft soap B. Potassium chloride 2. Fertilizer C. Potassium hydroxide 3. Photoelectric cells …