a. Electrical attraction forces b. Vander Waal’s forces c. Covalent bond forces d. Strong electrostatic attraction forces Ans. c Explanation : Quartz is a covalent solid in which constituent particles are atoms which are held together by covalent bond forces. …
a. Both the bands are overlapped with each other b. Very small c. Infinite d. Very large Ans. d Explanation : When insulators (non metal atoms) interact to form a solid their atomic orbitals mix to form two bunches of …
a. Pyroelectricity b. Ferroelectricity c. Peizoelectricity d. Ferrielectricity Ans. c Explanation : When polar crystal is subjected to a mechanical stress, electricity is produced a case of piezoelectricity. Reversely if electric field is applied mechanical stress is developed. Piezoelectric crystal …
a. Isomers b. Isotopes c. Allotropes d. Polymers Ans. c Explanation : Diamond and graphite are the crystalline allotropes of carbon (7)
a. Amorphism b. Isomophism c. Polymorphism d. Isomerism Ans. c Explanation : Polymorphism is an ability of a substance which shows two or more crystalline structure. (8)
a. Dryer b. Buffering agent c. Antiseptic d. Softener Ans.c Explanation : Bithional is added to soap as an antiseptic (7)
a. Long range order b. Short range order c. Disordered arrangement d. None of these Ans. a Explanation : Crystalline solids have regular arrangement of constituent particles, sharp melting points and are anisotropic (10)
a. In solid NaCl there are no ions b. Solid NaCl is covalent c. In solid NaCl there is no velocity of ions d. In solid NaCl there are no electrons Ans. c Explanaton :Solid NaCl is a bad conductor …
a. Covalent solids b. Ionic solids c. Pseudo solids d. Molecular solids Ans. b Explanation : Ionic solids have highest melting point due to strong electrostatic forces of attraction (6)
a. It both assertion and reason are true and the reason is the correct explanation of the assertion b. If Both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
a. Anisotropic b. Isotropic c. Hard d. Dense Ans. b Explanation : Not isotropic actually refers to anisotropic here. (13)
a. BatiO 3 b. K 4 [Fe(CN) 6 ] c. PB 2 O 3 d. PbZrO 3 Ans. a Explanation : BaTio 3 is a ferroelectric compound. (9)
a. Metallic b. Molecular c. Network d. Ionic e. Amorphous Ans. d Explanation : Properties of ionic solid (6)
a. It both assertion and reason are true and the reason is the correct explanation of the assertion b. If Both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
a. It both assertion and reason are true and the reason is the correct explanation of the assertion b. If Both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
a. Sodiumlauryl sulphate b. Pentaerythrity stearate c. Cetyltrimethyl ammonium chloride d. Sodium n- dodecyl benzene sulphonate Ans. b Explanatinon : Esters of high molecular mass formed by reactions between polyethylene glycol and mono carboxylic acid are non ionic detergents hence …
a. Cationic detergents b. Anioic detergents c. Non ionic detergents d. Soaps Ans. c (6)
a. C17 H35 COOk b.C17 H35 COOH c.C15 H31 COOH d. (C17 H35 COOk ) 2 Ca Ans. a Explanation : Soapa are the sodium or potassium salt of higher fatty acids. These are obtained by alkaline hydrolysis of oils and …
a. It both assertion and reason are true and the reason is the correct explanation of the assertion b. If Both assertion and reason are true but reason is not the correct explanation of the assertion c. If assertion is …
a. TV b. Radio c. Record player d. Freeze Ans. c Explanation : Piezoelectric crystals are used in record player. (9)
a. Ice b. Phosphorus c. Naphthalene d. Sodium fluoride Ans. a Explanation : Ice has the lowest melting point out of the given solids; hence it has the weakest intermolecular forces. (7)
a. Sodium lauryl sulphate b. Cetyltrimethyl ammmonium bromide c. Glyceryl oleate d. Sodium stearate Ans. a (8)
H2 SO 4 followed by neutralization by starting with a. Cholesterol b. Lauryl alcohol c. Cyclohexanol d. p-nitrophenol Ans. b Explanation : Detergents can be obtains by the sulphonation of lauryl alcohol followed by neutralisation (9)
a. Liquid hydrogen + liquid nitrogen b. Liquid oxygen + liquid argon c. Liquid hydrogen + liquid oxygen d. Liquid nitrogen + liquid oxygen Ans. c (9)
a. A liquid oxidizer and a solid fuel b. A composite solid propellant c. A biliquid propellant d. A solid liquid and gas as a propellant Ans. a (9)
Column I Column II A. Sodium perborate (I) disnifectant B. Chlorine …
a. Ester group b. Sodium sulphate c. Aldehyde d. Amine group Ans. b Explanation : A detergent molecule consists of a large hydrocarbon group that is non ionic and a sulphonate or a sulphate group that is ionic Example of …
a. As a filler b. To increases leathering c. To prevent rapid drying d. To make soap granules Ans. c Explanation : Glycerol is added to shaving soap to prevent rapid drying while to enhance the leathering property of soap …
a. Sodium carbonate b. Sodium rosinate c. Sodium stearate d. Trisodium phosphate Ans. b Explanation : Shaving soaps containn glycerol to prevent rapid drying while preparing this soap a gum called rosin is added to them It forms sodium rosinate …
a. Sodium laurylsulphate b. Sodium dodecylbenzenesulphonate c. Rosin d. Bithional Ans.d Explanation : Basically all soaps are made by boiling fats or oils with suitable hydroxide variations are made by a adding different raw materials Sodium laurylsulphate and sodium dodecylbenzenesulphonate …
a. Nitroglycerin + nitrocellulose b. N2 O4 + acrylic rubber c. N2 O4 + unsymmetrical dimethyl hydrazene d. None of these Ans. c Explanation : Both are in liquid form. (6)
a. O2 and N 2 O b.O2 and He c.O2 and NH 2 d. O2 and CO Ans. b Explanation : a mixture of O2 and He is used for respiration as helium is inert and light gas and diffuse rapidly (9)
a. CrO 3 b. Cr 2 O 3 c. N 2 O 4 d. H2 O 2 Ans.c Explanation : Hybrid fuel consists of solid fuel and a liquid oxidiser (8)
a. Soap b. Fertilizers c. Pesticides d. Detergents Ans.d Explanation : It is used as detergents (9)
a. normal alkyl chain b. Branched alkyl chian c. Phenyl side chain d. Cyclohexyl side chain Ans. a Explanation : Structurally biodegradable detergent contain normal (28)
a. Pheromones b. Hormones c. Nucleic acid d. Steroids Ans. a Explanation : by definition (8)
a. Liquid He b. Liquid Hydrogen c. Kerosene d. Liquid Hydrazine Ans. a Explanation : Helium is a non – combustible gas (because of inert gas) so it is not used as a fuel in the rocket propellant (13)
a. Sodium dedecylbenzene sulphonate b. Sodium lauryl sulphate c. Tetramethyl ammonium chloride d. Sodium stearyl sulphate e. Setytrimethyl ammonium uses Ans. e (10)