Chemistry
-
Jun 1, 2022
a. Sodium b. Magesium c. Zine d. Copper Ans. a Explanation : Sodium (Na) is a body centred cube. (7)
-
Jun 1, 2022
a. 4 and 2 b. 9 and 14 c. 14 and 9 d. 2 and 4 Ans.d (8)
-
Jun 1, 2022
a. 8 b. 4 c. 2 d. 6 Ans. d Explanation : a cube has 6 faces so it is...
-
Jun 1, 2022
a ≠b ≠c, α ≠ϒ = 90 º is a. Calcite b. Graphite c. Rhombic sulphur d....
-
Jun 1, 2022
a. 7 b. 13 c. 32 d. 230 Ans. b Explanation : There are 14 Bravasi lattices (space lattices) (9)
-
Jun 1, 2022
a. lonic b. Covalent c. Metallic d. Molecular Ans.c Explanation : Metallic crystals are good conductor of heat and current...
-
Jun 1, 2022
a. Bigger ions form the close packed structure b. Smaller ions occupy either the tetrahedral or the octahedral voids depending...
-
Jun 1, 2022
a. Conducting solid b. Network solid c. Covalent solid d. Ionic solid Ans. d (16)
-
Jun 1, 2022
a. SiO2 B. MgO c. SO2 (s) d. CrO2 Ans. d Explanation : CrO2 , TiO and ReOÂ Â are...
-
Jun 1, 2022
a. TiO b. SiO2 c. TiO3 d. MgO Ans. c Explanation : Certain metal oxides like VO 2, VO, VOÂ 3...
-
Jun 1, 2022
Mg (s)Â Â 2. TiO (s)Â Â 3. IÂ 2 Â Â Â 4. HÂ 2 O (s) a. only 1 b....
-
Jun 1, 2022
a. London forces b. Dipole dipole interactions c. Covalent bonds d. Coulombic forces Ans. a (6)
-
Jun 1, 2022
a. London forces b. Dipole- dipole interaction c. Covalent bonds d. Coulombic forces Ans.a Explanation : Iodine molecules are a...
-
Jun 1, 2022
a. Same in all directions b. Different in different directions c. Cannot be measured d. Always zero Ans.a Explanation :...
-
Jun 1, 2022
a. Graphite (C) b. Quartz glass (SiO2) c. Chrome alum d. Silicon carbide (SiC) Ans. b Explanation : Quartz glass...
-
Jun 1, 2022
a. Solid substance in real sense b. Liquid in real sense c. Supercooled liquid d. Substance with definite melting solid...
-
Jun 1, 2022
a. Weakly bonded together b. Strongly bonded together c. Spherically symmetrical d. Arranged in planes Ans. d Explanation : Crystals...
-
Jun 1, 2022
a. Fe3  O4 b. CrO 2 c. H2 O d. MnO Ans. d Explanation : MnO this aries when the dipole...
-
Jun 1, 2022
a. Octahedral sulphur b. Monoclinic sulphur c. Plastic sulphur d. Colloidal sulphur Ans. a (24)
-
Jun 1, 2022
a. They melt over a range of temperature b. They are anisotropic c. There is no orderly arrangement of particles...
-
Jun 1, 2022
a. KCl b. Glass c. lce d. Diamond Ans.b Explanation : Amorphous or non- crystalline solids do not have sharp...
-
Jun 1, 2022
a. Changes abruptly form solid to liquid when heated b. Has no definite melting point c. Undergoes deformation of its...
-
Jun 1, 2022
a. All the domains get oriented in the direction of magnetic field b. All the domains get oriented in the...
-
Jun 1, 2022
a. Pyro – electricity b. Piezo electricity c. Ferro- electricity d. Ferri- electricity Ans. a Explanation : It is the...
-
Jun 1, 2022
a. Glass b. Rubber c. Plastic d. Sugar Ans. d Explanation : Sugar is a crystalline solid while glass, rubber...
-
Jun 1, 2022
a. Si b. NaF c. Al d. Ar Ans. a Explanation : Silicon is a covalent crystal in which constituent...
-
Jun 1, 2022
a. Silica b. Sodium silicate c. Silicon carbide d. Silicon Ans.a Explanation : Quartz is a covalent crystal having a...
-
Jun 1, 2022
a. They prossess high melting point and boiling point b. All are electrolyte c. Exhibit the property of isomorphism d....
-
Jun 1, 2022
a. The capacity of layers of metal ions to slide over the other b. The interaction of electrons with metal...
-
Jun 1, 2022
a. MnOÂ 2 b. TiOÂ 2 c. VOÂ 2 d. CrOÂ 2 Ans. a Explanation : MnO 2 Â is antiferromagnetic (13)
-
Jun 1, 2022
a. Paramagnetic substances are weakly attracted by magnetic field b. Ferromagnetic substances cannot be magnetised c. The domains in antiferromagnetic...
-
Jun 1, 2022
a. Very low value of electrical conductivity in the molten state b. Brittle nature c. Very strong forces of interactions...
-
Jun 1, 2022
a. A regular arrangement of constituent particles observed over a short distance in the crystal lattice b. A regular arrangement...
-
Jun 1, 2022
a. High temperature b. Low temperature c. High thermal energy d. Weak cohesive forces Ans. b (11)
-
Jun 1, 2022
a. Ionic crystal b. Covalent crystal c. Metallic crystal d. Molecular crystal Ans. d Explanation : Wax crystal are molecular...
-
Jun 1, 2022
a. Atoms as their structural units b. Molecules as structural units c. Ions held together by electrostatic forces d. High...
-
Jun 1, 2022
a. Electrical attraction forces b. Vander Waal’s forces c. Covalent bond forces d. Strong electrostatic attraction forces Ans. c Explanation...
-
Jun 1, 2022
a. Both the bands are overlapped with each other b. Very small c. Infinite d. Very large Ans. d Explanation...
-
Jun 1, 2022
a. Pyroelectricity b. Ferroelectricity c. Peizoelectricity d. Ferrielectricity Ans. c Explanation : When polar crystal is subjected to a mechanical...
-
Jun 1, 2022
a. Isomers b. Isotopes c. Allotropes d. Polymers Ans. c Explanation : Diamond and graphite are the crystalline allotropes of...