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.
| 901. |
Force responsible to hold atoms together in a compound is called ________________? |
| A. | Bond |
| B. | Attractive force |
| C. | Interaction |
| D. | All of above represent same entity |
| Answer» B. Attractive force | |
| 902. |
For which system does the equilibrium constant Kc has unit of (concentration)-1__________________? |
| A. | N2+3H2 2NH3 |
| B. | H2+I2 2HI |
| C. | 2NO2 N2H4 |
| D. | PCI5 PCI3+CI2 |
| Answer» D. PCI5 PCI3+CI2 | |
| 903. |
For which of the following compounds the term empirical formula cannot be applied ? |
| A. | NaCl |
| B. | H2O |
| C. | CCI4 |
| D. | It can be applied to all mentioned above |
| Answer» E. | |
| 904. |
For which mechanisms the first step involved is the same ? |
| A. | E1 + E2 |
| B. | E2 + SN2 |
| C. | E1 and SN1 |
| D. | SN1 and SN2 |
| Answer» D. SN1 and SN2 | |
| 905. |
For the reaction 2HI ____________> H2+ I2 |
| A. | Kp > kc |
| B. | Kc > kp |
| C. | Kp= kc |
| D. | Kp ≤ kc |
| Answer» D. Kp ≤ kc | |
| 906. |
For the measurement of standard electrode potential Zn is dipped in________________? |
| A. | 1 M ZnO solution |
| B. | 1 M ZnSO4 solution |
| C. | 1.5 M ZnSO4 solution |
| D. | 0.1 M ZnSO4 solution |
| Answer» C. 1.5 M ZnSO4 solution | |
| 907. |
For industrial preparation of CH3CHO catalytic promoter is_________________? |
| A. | PdCl2 |
| B. | Cu2Cl2 |
| C. | CuCl2 |
| D. | PbCl2 |
| Answer» C. CuCl2 | |
| 908. |
For determining the order of reaction we use__________________? |
| A. | Refractometric method |
| B. | Dilatometric method |
| C. | Optical activity method |
| D. | Half life method |
| Answer» E. | |
| 909. |
For a reaction involving only gases at 25?C the equilibrium constant can be expressed in terms of molarity Ke or partial pressure Kp. Which is true about the numerical value of Kp ? |
| A. | Kc is generally greaer than Kp |
| B. | Kc is generally less than Kp |
| C. | Kc is generally equal to Kp |
| D. | Kc is equal to Kp if the total moles of reactants and products are equal |
| Answer» E. | |
| 910. |
For a given process the heat changes at constant pressure (qp) and at constant volume (qv) are related to each other as___________________? |
| A. | qp = qv |
| B. | qp < qv |
| C. | qp > qv |
| D. | qp = qv / 2 |
| Answer» D. qp = qv / 2 | |
| 911. |
For a given mass of a gas at constant temperature, if the value V becomes 3 times, the pressure will becomes__________? |
| A. | 3P |
| B. | P/3 |
| C. | 3P/T |
| D. | 6P |
| Answer» C. 3P/T | |
| 912. |
For a gas where volume and pressures are 1dm3 and 2 atm respectively what should be its new volume when pressure is increased to 6 atm at constant temperature ? |
| A. | 1/2dm3 |
| B. | 1/3dm3 |
| C. | 1/4dm3 |
| D. | 2/3dm3 |
| Answer» C. 1/4dm3 | |
| 913. |
For 3rd order reaction the hhalf life is inversely proportional to initial concentration of reactants__________________? |
| A. | Single |
| B. | Square |
| C. | Cube |
| D. | Raise to power four |
| Answer» C. Cube | |
| 914. |
Following are the anions of soap which form Ca and Mg ions which we see as curd in water |
| A. | Sodium hexadecanoate |
| B. | Sodium octadecanoate |
| C. | Sodium pentadecanoate |
| D. | Both A & B |
| Answer» E. | |
| 915. |
Fluted filter paper is used to__________________? |
| A. | Filter hot solution |
| B. | Avoid premature crystallization |
| C. | Increase the rate of filtration |
| D. | Decrease the area |
| Answer» D. Decrease the area | |
| 916. |
Fluorine can react with_________________? |
| A. | Xe |
| B. | Kr |
| C. | Rn |
| D. | All of the above |
| Answer» E. | |
| 917. |
First organic compound synthesized in laboratory was _________________? |
| A. | tartaric acid |
| B. | ethyl alcohol |
| C. | methanol |
| D. | urea |
| Answer» E. | |
| 918. |
First ionization potential of alkaline earth metal is greater than alkali metals because___________________? |
| A. | They are more reactive |
| B. | They have greater atomic radii |
| C. | They have smaller atomic sizes |
| D. | All |
| Answer» D. All | |
| 919. |
Find the PH of a 0.001 M solution of Nitric acid HNO3? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 920. |
FeSO4 forms brown ring with________________? |
| A. | N2O3 |
| B. | NO2 |
| C. | NO |
| D. | N2O |
| Answer» D. N2O | |
| 921. |
Example of ‘globular’ proteins is __________ ? |
| A. | Peptide |
| B. | Enzymes |
| C. | Primary protein |
| D. | Secondary proteins |
| Answer» C. Primary protein | |
| 922. |
Every sample of matter with uniform properties and fixed composition is called_________________? |
| A. | solute |
| B. | solvent |
| C. | solution |
| D. | phase |
| Answer» E. | |
| 923. |
Ethylene diammine is ligand________? |
| A. | mono dentate |
| B. | Bi dentate |
| C. | tri dentate |
| D. | Poly dentate |
| Answer» C. tri dentate | |
| 924. |
Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________? |
| A. | primary alcohol |
| B. | secondary alcohol |
| C. | tertiary alcohol |
| D. | dihydric alcohol |
| Answer» B. secondary alcohol | |
| 925. |
Ethyl chloride with nascent hydrogen produces_________________? |
| A. | methane |
| B. | ethane |
| C. | propane |
| D. | butane |
| Answer» C. propane | |
| 926. |
Ethy1 chloride on reduction in the presence of Zn/HCI produces___________________? |
| A. | n. butane |
| B. | Ethanol |
| C. | Ethane |
| D. | Diethy1 ether |
| Answer» D. Diethy1 ether | |
| 927. |
Ethers show functional group isomerism with __________________? |
| A. | aldehydes |
| B. | ketones |
| C. | alcohols |
| D. | carboxylic acid |
| Answer» D. carboxylic acid | |
| 928. |
Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter? |
| A. | PdCl2 |
| B. | Cu2Cl2 |
| C. | CuCl2 |
| D. | PbCl2 |
| Answer» D. PbCl2 | |
| 929. |
Ether functional group can be represented as ____________________? |
| A. | OH |
| B. | R-CO-R |
| C. | R-O-R |
| D. | R-COOH |
| Answer» D. R-COOH | |
| 930. |
Ethanol can be converted into ethanoic acid by_________________? |
| A. | Hydrogenation |
| B. | Hydration |
| C. | Oxidation |
| D. | Fermentation |
| Answer» D. Fermentation | |
| 931. |
Ethanol and methanol can be distinguished by a__________________? |
| A. | Iodoform test |
| B. | Lucas test |
| C. | Benedicts test |
| D. | Tollens test |
| Answer» B. Lucas test | |
| 932. |
Estimation of amounts of different components in a sample is________________? |
| A. | Quantitative analysis |
| B. | Qualitative analysis |
| C. | Stochiometery |
| D. | Physical chemistry |
| Answer» B. Qualitative analysis | |
| 933. |
Essential amino acids are___________________? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» C. 15 | |
| 934. |
Equilibrium state is achieved quickly by the addition of ________________? |
| A. | reactants |
| B. | acid |
| C. | base |
| D. | catalyst |
| Answer» E. | |
| 935. |
Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________? |
| A. | one / seventeen |
| B. | sixteen / seventeen |
| C. | one / three |
| D. | two / three |
| Answer» D. two / three | |
| 936. |
Enzynies that catalyze the transfer of groups within molecule are called_________________? |
| A. | Isomerases |
| B. | Lyases |
| C. | Transferases |
| D. | Ligases |
| Answer» B. Lyases | |
| 937. |
Enzymes from the same organism which catalyze same reaction but are chemically and physically distinct from each other are called______________? |
| A. | Oxidoreductases |
| B. | Hydrolases |
| C. | Isoenzymes |
| D. | Isomerases |
| Answer» D. Isomerases | |
| 938. |
Enzyme proved useful in cancer treatment is_______________? |
| A. | Lactic dehydrogenase |
| B. | Alkaline phosphatase |
| C. | L-asparaginase |
| D. | Cellulase |
| Answer» D. Cellulase | |
| 939. |
Enthalpy of combustion for food fuel and other compounds can be measured accurately by________________? |
| A. | glass calorimeter |
| B. | bomb calorimeter |
| C. | thermometer |
| D. | manometer |
| Answer» C. thermometer | |
| 940. |
Enthalpy of a reaction can be measured by ____________________? |
| A. | glass calorimeter |
| B. | manometer |
| C. | Barometer |
| D. | thermometer |
| Answer» B. manometer | |
| 941. |
Enthalpy change can be_________________? |
| A. | calculated by Hess law |
| B. | can be measured by calorimeter |
| C. | both A and B |
| D. | none |
| Answer» D. none | |
| 942. |
Energy released or absorbed when electrons are added in atom is_________________? |
| A. | Ionization potential |
| B. | Electronegativity |
| C. | Electron affinity |
| D. | Activation energy |
| Answer» D. Activation energy | |
| 943. |
Energy required to remove electron from an atom______________? |
| A. | Ionization potential |
| B. | Electronegativity |
| C. | Electron affinity |
| D. | Activation energy |
| Answer» B. Electronegativity | |
| 944. |
Energy required to form transition state is called _________________? |
| A. | Ea |
| B. | P.E |
| C. | V |
| D. | K.E |
| Answer» B. P.E | |
| 945. |
Energy of reactant higher than energy of product favours A. Endothermic_______________? |
| A. | Exothermic |
| B. | Moderate reaction |
| C. | No reaction |
| D. | None of these |
| Answer» B. Moderate reaction | |
| 946. |
Energy of atom in compound is___________________? |
| A. | Higher than individual |
| B. | Lesser than individual |
| C. | No change |
| D. | Impossible to predict |
| Answer» C. No change | |
| 947. |
Energy of activation for backward reaction is less than forward reaction for ___________ reactio? |
| A. | Endothermic |
| B. | Exothermic |
| C. | Moderate |
| D. | Fast |
| Answer» B. Exothermic | |
| 948. |
End name of enzyme is___________________? |
| A. | yl |
| B. | ase |
| C. | one |
| D. | al |
| Answer» C. one | |
| 949. |
Empirical formula of chloroform is____________________? |
| A. | CH2 C12 |
| B. | CH3C1 |
| C. | CC14 |
| D. | CHCL3 |
| Answer» E. | |
| 950. |
Elimination bimolecular reactions involve____________________________? |
| A. | first order kinetics |
| B. | second order kinetics |
| C. | third order kinetics |
| D. | zero order kinetics |
| Answer» C. third order kinetics | |