MCQOPTIONS
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MCQOPTIONS
This section includes 1184 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1051. |
Bond will beionic when E.N difference of bonded atom is ____________________? |
| A. | Equal to 1.7 |
| B. | Greater than 1.7 |
| C. | Less than 1.7 |
| D. | No specificity exists |
| Answer» C. Less than 1.7 | |
| 1052. |
Bond order for N2 molecule is __________________? |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 1053. |
Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to_________________? |
| A. | More strength of H-bonding |
| B. | More strength of London forces |
| C. | Less polarizability |
| D. | All of the above |
| Answer» C. Less polarizability | |
| 1054. |
Boiling point elevations can be measured by__________________? |
| A. | Beckmanns method |
| B. | Landsbergers method |
| C. | Linds method |
| D. | none of the above |
| Answer» C. Linds method | |
| 1055. |
Bohrs model is contradicted by__________________? |
| A. | Plancks theory |
| B. | Dual nature of matter |
| C. | Heisenbergs uncertainty principle |
| D. | All of these |
| Answer» D. All of these | |
| 1056. |
Bleaching powder is not used for bleaching________________? |
| A. | Cotton |
| B. | Costly fabrics |
| C. | Linen |
| D. | Paper pulb |
| Answer» C. Linen | |
| 1057. |
Bleaching powder is an example of________________? |
| A. | Normal salt |
| B. | Double salt |
| C. | Mixed salt |
| D. | Complex |
| Answer» D. Complex | |
| 1058. |
Biocatalytical proteins are_________________? |
| A. | Enzymes |
| B. | Substrate |
| C. | Lipids |
| D. | any of above |
| Answer» B. Substrate | |
| 1059. |
Best position of hydrogen in the periodic table is above I.A Group which is mainly due to_______________? |
| A. | Both are electropositive |
| B. | Similar outer most shell electronic configuration |
| C. | Both form ionic compounds |
| D. | All |
| Answer» E. | |
| 1060. |
Benzene does not undergo___________________? |
| A. | Substitution reaction |
| B. | Addition reaction |
| C. | Polymerization reactions |
| D. | Oxidation reactions |
| Answer» D. Oxidation reactions | |
| 1061. |
Benzene is heated in air with V2O5 at 450°C it undergoes________________? |
| A. | Substitution reaction |
| B. | Addition reaction |
| C. | Elimination reaction |
| D. | Oxidation reaction |
| Answer» E. | |
| 1062. |
Benzene is a good solvent for__________________? |
| A. | fats |
| B. | resins |
| C. | iodine |
| D. | all the above |
| Answer» E. | |
| 1063. |
Beillstein test is used for________? |
| A. | Cl |
| B. | N2 |
| C. | CO2 |
| D. | CO |
| Answer» B. N2 | |
| 1064. |
BeCl2 has the hybrid orbitaks of type_______? |
| A. | Sp2 |
| B. | Sp3 |
| C. | Sp |
| D. | dsp2 |
| Answer» D. dsp2 | |
| 1065. |
Beckmanns apparatus is used to measure_______________? |
| A. | boiling point elevation |
| B. | depression in freezing point |
| C. | lowering of vapour pressure |
| D. | lowering of osmotic pressure |
| Answer» C. lowering of vapour pressure | |
| 1066. |
Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________? |
| A. | As nitrometer |
| B. | To remove air bubbles from molten metal |
| C. | To produce alloy |
| D. | As insulator |
| Answer» C. To produce alloy | |
| 1067. |
Basicity of orthophosphoric acid is________? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 1068. |
Azimuthal quantum number defines___________? |
| A. | e/m ratio of an electron |
| B. | Spin of an electron |
| C. | Angular momentum of an electron |
| D. | Magnetic momentum of an electron |
| Answer» D. Magnetic momentum of an electron | |
| 1069. |
Avogadros number may represent_________________? |
| A. | volume of particles |
| B. | number of particles |
| C. | mass of particles |
| D. | All of the above |
| Answer» E. | |
| 1070. |
Atomic radius can be determined by_________________? |
| A. | X – ray diffraction |
| B. | Spectrophotometer |
| C. | Optical microscope |
| D. | Electron microscope |
| Answer» B. Spectrophotometer | |
| 1071. |
Atomic orbits having same energy are called________________? |
| A. | Degenerate orbitals |
| B. | Bonding molecular orbitals |
| C. | Anti bonding molecular orbitals |
| D. | Half filled orbitals |
| Answer» B. Bonding molecular orbitals | |
| 1072. |
Atomic number of Mn is 25 what is the electronic configuration in the ground state________________? |
| A. | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁷ |
| B. | 1s² 2s² 2p6 3s² 3p⁶ 4s² 4p⁵ |
| C. | 1s² 2s² 2p⁶ 3s² 3p⁵ 3d10 |
| D. | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²3d⁵ |
| Answer» E. | |
| 1073. |
Atom with higher atomic number produces X-rays of__________________? |
| A. | Shorter wavelength |
| B. | Larger wavelength |
| C. | X-ray not produced |
| D. | All are possible |
| Answer» B. Larger wavelength | |
| 1074. |
Atom cannot be divided into simple unitstheorized by________________? |
| A. | Rutherford |
| B. | Dalton |
| C. | Bohr |
| D. | Schrodinger |
| Answer» C. Bohr | |
| 1075. |
At which electrode the reduction of the solution is occurring in Al-Ag cell_____________? |
| A. | A |
| B. | Ag |
| C. | Both |
| D. | Neither |
| Answer» C. Both | |
| 1076. |
At start of reaction the concentration of reactants is_______________? |
| A. | high |
| B. | low |
| C. | according to Kc |
| D. | constant |
| Answer» B. low | |
| 1077. |
At low temperature and pressure cracking can be done in presence of catalyst________________? |
| A. | Al2O3 |
| B. | Fe2O3 |
| C. | Al2O3 and SiO2 |
| D. | Fe2O3 and SiO2 |
| Answer» D. Fe2O3 and SiO2 | |
| 1078. |
At constant temperature the pressure of an ideal gas is doubled its density becomes_______________? |
| A. | Half |
| B. | Double |
| C. | Same |
| D. | None |
| Answer» C. Same | |
| 1079. |
As a substance moves from a solid to a liquid all of the following changes occur except ? |
| A. | molecules become more disordered. |
| B. | K.E of the molecules decreases |
| C. | intermolecular forces become weaker |
| D. | molecules move more frequently |
| Answer» C. intermolecular forces become weaker | |
| 1080. |
Arsenic oxides are removed by passing through_________________? |
| A. | Ferric hydroxide |
| B. | Sodium hydroxide |
| C. | Calcium hydroxide |
| D. | Aluminium hydroxide |
| Answer» B. Sodium hydroxide | |
| 1081. |
Argon gas was discovered by_______? |
| A. | Rayleigh |
| B. | Ramsay |
| C. | Lockerey |
| D. | Dalton |
| Answer» C. Lockerey | |
| 1082. |
Argillaceous material does not include________________? |
| A. | vlay |
| B. | marine shells |
| C. | slate |
| D. | blast furnace slag |
| Answer» C. slate | |
| 1083. |
Aqueous solution of borax above 62°C gives crystals of________________? |
| A. | Na2B4O7.4H2O |
| B. | Na2B4O7.5H2O |
| C. | Na2B4O7.2H2O |
| D. | Na2B4O7.10H2O |
| Answer» C. Na2B4O7.2H2O | |
| 1084. |
Apparent charge on atom in molecule is___________________? |
| A. | valency |
| B. | coordination number |
| C. | oxidation number |
| D. | charge number |
| Answer» D. charge number | |
| 1085. |
Anything which increases rate of reaction without being involved in the reaction________________? |
| A. | Promoter |
| B. | Catalyst |
| C. | Inhibitor |
| D. | All of the above |
| Answer» C. Inhibitor | |
| 1086. |
Anything which depends upon initial and final state of a system is_______________? |
| A. | environment |
| B. | surrounding |
| C. | state function |
| D. | enthalpy |
| Answer» D. enthalpy | |
| 1087. |
Any substance which accepts H+ is base favours the concept___________________? |
| A. | Lowrys |
| B. | Lewis |
| C. | Arrhenius |
| D. | None of these |
| Answer» B. Lewis | |
| 1088. |
Any process of chemical decay of metals due to the action of surrounding medium is called__________________? |
| A. | activation |
| B. | enameling |
| C. | corrosion |
| D. | coating |
| Answer» D. coating | |
| 1089. |
Animal fats are located particularly in__________________? |
| A. | Skeleton tissues |
| B. | Cardiac tissues |
| C. | Connective tissues |
| D. | Adipose tissues |
| Answer» E. | |
| 1090. |
Animal and vegetable fats are___________________? |
| A. | Glycerols |
| B. | Fatty acids |
| C. | Triesters formed from glycerol and fatty acids |
| D. | Tetraesters formed from glycerol and fatty acids |
| Answer» D. Tetraesters formed from glycerol and fatty acids | |
| 1091. |
Animal charcoal adsorbs the coloured_________________? |
| A. | impurities |
| B. | crystals |
| C. | solvents |
| D. | both A & B |
| Answer» B. crystals | |
| 1092. |
Aniline is a derivative of benzene which contains__________________? |
| A. | Imino group |
| B. | Amino group |
| C. | Amide group |
| D. | Nitro group |
| Answer» C. Amide group | |
| 1093. |
Angle of deflection was studied by________________? |
| A. | Hitorff |
| B. | Stoney |
| C. | William Crookes |
| D. | J.Perrin |
| Answer» E. | |
| 1094. |
An enzyme has its specificity due to________________? |
| A. | Substrate |
| B. | Structure |
| C. | Temperature |
| D. | Pressure |
| Answer» C. Temperature | |
| 1095. |
An element having low value of ionization energy and low value of electron affinity is likely to belong to__________________? |
| A. | Group IA |
| B. | Group IB |
| C. | Group VIIA |
| D. | Group VIII |
| Answer» B. Group IB | |
| 1096. |
An element has electronic conviguration 1s2 2s2 2p2. It belongs to__________________? |
| A. | Group II-A |
| B. | Group IV-A |
| C. | Group VII-A |
| D. | Group VI-A |
| Answer» C. Group VII-A | |
| 1097. |
An atom loses or gains electrons to__________________? |
| A. | Gain stability |
| B. | Form a bond |
| C. | Complete its outermost shell |
| D. | all are accurate justifications |
| Answer» E. | |
| 1098. |
An alcohol which can be prepared by fermentation is_________________? |
| A. | CH3OH |
| B. | C3H7OH |
| C. | CH3 – CH2 – OH |
| D. | C6H5OH |
| Answer» D. C6H5OH | |
| 1099. |
An acid with unpleasant smell_________________? |
| A. | formic acid |
| B. | acetic acid |
| C. | propionic acid |
| D. | butyric acid |
| Answer» E. | |
| 1100. |
Amylose is__________________? |
| A. | Soluble in water |
| B. | Insoluble in water |
| C. | Soluble in alcohol |
| D. | Partially soluble in alcohol |
| Answer» B. Insoluble in water | |