Last seen: Jan 13, 2022
(d) 5 Explanation: Impurity of higher group is doped to get n-type semiconductor. Thus, silicon (valency = 4) should be doped with the element wit...
(b) Neutral Explanation: p-Type semiconductors are neutral but they conduct electricity through positive holes.
(b) equal number of cations and anions are missing from the lattice
(a) Frenkel defect
(d) ionic solid Explanation: Constituent units of graphite are carbon atoms, held together by covalent bonding in 2D network structure. Thus, it i...
(c) electron Explanation: Pure crystals have constituents i.e., atoms or molecules or ions as lattice points which are arranged in fixed stoichiom...
(d) CrO2 Explanation: CrO2, TiO and ReO3 are some typical metal oxides which show electrical conductivity similar to metal. While SO2, MgO and SO2...
(c) TiO3 Explanation: TiO3 behaves as conductor or insulator depending on temperature because of variation of energy gap between valence band and ...
(b) free valence electrons Explanation: In graphite one carbon atom is attached to three other carbon atoms. One electron of carbon remains free. ...
(a) Very low value of electrical conductivity in the molten state Explanation: Type of solid: Ionic solids Constituent particles: Ions Bonding...
Together by London force or dispersion force. This is soft and non-conductor of electricity. Water is a hydrogen bonded molecular solid in which H ...
(c) Diamond Explanation: Diamond is a three-dimensional network solid in which each carbon atom is tetrahedrally bonded with four carbon atoms.
(a) London forces Explanation: I2 is a molecular solid Type of solid: Molecular solids (non-polar) Constituent particles: Molecules Bonding/...
(b) a regular arrangement of constituent particles observed over a long distance in the crystal lattice. Explanation: A solid is said to be crysta...
(d) They are anisotropic in nature Explanation: Amorphous solids are isotropic because they show thermal and optical properties, same in all direc...
(a) Same in all directions Explanation: Since quartz glass is an amorphous solid having short range order of constituents. Hence, value of refract...
(b) Quartz glass (SiO2) Explanation: Crystalline Silica (Quartz) 1. Crystalline in nature. Also called quartz. 2. All four corners of SiO44- t...
(b) Isotropic nature Explanation: Anisotropy: Crystalline solids are anisotropic in nature, that is some of their physical properties like electri...
(b) Low temperature Explanation: At low temperature substance exists in solid state due to decrease in molecular motion which leads to strong cohe...
The given properties are the properties of a covalent or network solid. Therefore, the given solid is a covalent or network solid. Examples of such ...