19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
A crystalline solid
Crystalline solid is
Amorphous substances show (1) Short and long range order (2) Short range order (3) Long range order (4) Have no sharp M.P.
Which is not a property of solids
Xenon crystallises in the fcc lattice and the edge of the unit cell is 620 pm. The nearest neighbour distance of Xe is
Which is not a property of solids
Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are [NEET 2021]
Which type of defect present in NaCl ? (JIPMER 2019)
The number of tetrahedral and octahedral voids in a CCP array of 100 atoms are respectively (Kerala CEE 2014)
Which of the following does not show electrical conduction in its physical state ? (CBSE AIPMT 2013)
Schottky defect in crystals is observed when (RPMT 2010)
The property of crystalline solid is not (OJEE 2010)
Assertion No compound has both Schottky and Frenkel defects. Reason Both defects change the density of the solid. [AIIMS 2008]
Electrons in a paramagnetic compound are
Those substances which show permanent magnetism even in the absence of magnetic field are called
On the basis of their magnetic properties, substances can be classified into …A… categories. Here, A refers to
Identify the incorrect statement.
Doping of silicon (Si) with boron (B) leads to
Which of the following has the highest value of energy gap?
If we mix pentavalent impurity in a crystal lattice of germanium then what type of semiconductor formation will occur?
…A… and …B… are the examples of intrinsic semiconductors. Here, A and B refer to
In case of semiconductors, the gap between the valence band and conduction band is …A… Here, A refers to
Insulators are the solids with very low conductivities ranging between …A… Here, A refers to
Types of point defects are
In a Schottky defect,