MCQOPTIONS
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MCQOPTIONS
This section includes 1262 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 851. |
Any substance which accepts H+ is base favours the concept___________________? |
| A. | Lowrys |
| B. | Lewis |
| C. | Arrhenius |
| D. | None of these |
| Answer» B. Lewis | |
| 852. |
In case of gases Kc is replaced by_______________? |
| A. | Ka |
| B. | Kb |
| C. | Kp |
| D. | K |
| Answer» D. K | |
| 853. |
Idea of pH and pOH was put forward by________________? |
| A. | Gibbs |
| B. | Einstein |
| C. | Sorenson |
| D. | Chadwick |
| Answer» D. Chadwick | |
| 854. |
Kc value has_______________? |
| A. | No units |
| B. | Units |
| C. | Both A & B |
| D. | None |
| Answer» D. None | |
| 855. |
Which of the following is a macro nutrient ? |
| A. | boron |
| B. | iron |
| C. | copper |
| D. | carbon |
| Answer» E. | |
| 856. |
When the value of Kc is very small then_______________________? |
| A. | reaction is at start |
| B. | product conc. Is maximum |
| C. | reactant conc. Is minimum |
| D. | reaction is completed |
| Answer» C. reactant conc. Is minimum | |
| 857. |
Which of the following is not a heavy industry ? |
| A. | iron |
| B. | fertilizer |
| C. | paper |
| D. | none |
| Answer» E. | |
| 858. |
At start of reaction the concentration of reactants is_______________? |
| A. | high |
| B. | low |
| C. | according to Kc |
| D. | constant |
| Answer» B. low | |
| 859. |
Which of the following solutions of H2SO4 is more concentrated ? |
| A. | 1 Molar solution |
| B. | 1 molal solution |
| C. | 1 normal solution |
| D. | all have same concentration |
| Answer» B. 1 molal solution | |
| 860. |
Requirement of macronutrient per acre of the land is_________________? |
| A. | 5 to 200 kg |
| B. | 20-200 kg |
| C. | 200-400 kg |
| D. | 30-400 kg |
| Answer» B. 20-200 kg | |
| 861. |
In which of the following layer of atmosphere there is more thickness of ozone layer ? |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | photosphere |
| Answer» C. mesosphere | |
| 862. |
Ka<10-3 means______________? |
| A. | Very strong base |
| B. | Very weak acid |
| C. | Very strong acid |
| D. | Very strong salt |
| Answer» C. Very strong acid | |
| 863. |
Which statement is wrong ? |
| A. | the amount of ozone layer is greater in the region close to the equator |
| B. | ozone acts as filter for UV radiations |
| C. | in the equatorial region it acts as pollutant |
| D. | CFCs play effective role in removing O3 in the stratosphere |
| Answer» B. ozone acts as filter for UV radiations | |
| 864. |
Which of the following is not a condition for the formation of smog ? |
| A. | sufficient NO |
| B. | sunlight |
| C. | less movement of air |
| D. | winds |
| Answer» E. | |
| 865. |
Newspaper can be recycled again and again how many times ? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 866. |
In the purification of portable water the coagulant used is_________________? |
| A. | alum |
| B. | nickel sulphate |
| C. | copper sulphate |
| D. | barium sulphate |
| Answer» B. nickel sulphate | |
| 867. |
Which of the following gases is the main cause of acid rain ? |
| A. | CO |
| B. | NO2 |
| C. | both a & b |
| D. | none of the above |
| Answer» C. both a & b | |
| 868. |
Which of the following is not a secondary pollutant_________________? |
| A. | ozone |
| B. | carbonic acid |
| C. | sulphuric acid |
| D. | carbon dioxide |
| Answer» E. | |
| 869. |
Major cause of SO2 on global scale is__________________? |
| A. | volcanoes |
| B. | electric sparks |
| C. | combustion |
| D. | all |
| Answer» B. electric sparks | |
| 870. |
Which of the following factors help to measure quallity of water ? |
| A. | DO |
| B. | BOD |
| C. | COD |
| D. | all of the above |
| Answer» E. | |
| 871. |
A single chlorine free radical can destroy how many ozone molecules ? |
| A. | 10 |
| B. | 100 |
| C. | 10000 |
| D. | 100000 |
| Answer» E. | |
| 872. |
Which of the following is used as water disinfectant to avoid the formation of toxic compounds_________________? |
| A. | Cl2 |
| B. | O3 |
| C. | ClO2 |
| D. | both B & C |
| Answer» E. | |
| 873. |
Which of the following are the conditions of colligative properties_______________? |
| A. | Non-electrolye solute |
| B. | Non-volatile solute |
| C. | Dilute solution |
| D. | All of the above |
| Answer» E. | |
| 874. |
Which of the following is an example of liquid in gas solution? |
| A. | Opals |
| B. | Dust particles in smoke |
| C. | Paints |
| D. | Fog |
| Answer» E. | |
| 875. |
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 | |
| 876. |
Solubility of KCIO3 gives__________________? |
| A. | continuous and falling solubility curve |
| B. | discontinuous and falling solubility curve |
| C. | continuous and rising solubility curve |
| D. | discontinuous and rising solubility curve |
| Answer» D. discontinuous and rising solubility curve | |
| 877. |
The compounds in which water molecules are added are called_______________? |
| A. | Hydrated ions |
| B. | double salts |
| C. | hydrates |
| D. | complexes |
| Answer» D. complexes | |
| 878. |
Which one of the following alcohol has greater boiling point___________________? |
| A. | ethanol |
| B. | ethylene glaycol |
| C. | glycerol |
| D. | methanol |
| Answer» D. methanol | |
| 879. |
Density of H2SO4 in lead accumulator is__________________? |
| A. | 1.25g/cm3 |
| B. | 1.3g/cm3 |
| C. | 1.20g/cm3 |
| D. | 1.15g/cm3 |
| Answer» B. 1.3g/cm3 | |
| 880. |
Every sample of matter with uniform properties and fixed composition is called_________________? |
| A. | solute |
| B. | solvent |
| C. | solution |
| D. | phase |
| Answer» E. | |
| 881. |
The component of solution which is in smaller amount is called_________________? |
| A. | solvent |
| B. | solute |
| C. | phase |
| D. | ion |
| Answer» C. phase | |
| 882. |
The molal boiling point constant is the ration of the elevation of boiling point to____________________? |
| A. | Molarity |
| B. | Molality |
| C. | More fraction of solvent |
| D. | Mole fraction of solute |
| Answer» C. More fraction of solvent | |
| 883. |
Which of the following unit of concentration is independent of temperature ? |
| A. | Molarity |
| B. | Molality |
| C. | Mole fraction |
| D. | all |
| Answer» C. Mole fraction | |
| 884. |
Hydration is a process in which_________________? |
| A. | Molecules are surrounded by solvent molecules |
| B. | Ions are surrounded by solvent molecules |
| C. | Both ions and molecules are surrounded by solvent molecules |
| D. | Both ions and molecules are surrounded by water molecules |
| Answer» E. | |
| 885. |
Absolute alcohol is obtained when rectified spirit is treated with__________________? |
| A. | Ca(OH)2 |
| B. | CaCO3 |
| C. | CaCl2 |
| D. | CaO |
| Answer» E. | |
| 886. |
The determination of correct molecular weight from Raoults law is applicable to_________________? |
| A. | a volatile solute in dilute solution |
| B. | a non-electrolyte & non volatile solute in concentrated solution |
| C. | a non-electrolyte & non volatile solute in concentrated solute |
| D. | non volatile solute in a dilute solution |
| Answer» E. | |
| 887. |
Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ? |
| A. | Zeolites |
| B. | Sulphonides |
| C. | Lime |
| D. | Nitrates |
| Answer» B. Sulphonides | |
| 888. |
Molten NaCl conducts electricity due to the presence of_______________? |
| A. | Free electrons |
| B. | Free molecules |
| C. | Free ions |
| D. | Atoms of Na and Cl |
| Answer» D. Atoms of Na and Cl | |
| 889. |
Which has the minimum freezing point ? |
| A. | One Molal NaCI |
| B. | One molal KCI solution |
| C. | One molal CaCI2 |
| D. | One molal urea solution |
| Answer» D. One molal urea solution | |
| 890. |
Zn(s)/Zn+2(aq) 1M | | Cu+2(aq) 1M/Cu(s) is representation of reaction in______________? |
| A. | Daniel cell |
| B. | Downs cell |
| C. | Voltaic cell |
| D. | Nelsons cell |
| Answer» D. Nelsons cell | |
| 891. |
The relative lowering of vapour pressure is directly proportional to molality if the solution is________________? |
| A. | concentrated |
| B. | dilute |
| C. | saturated solution |
| D. | all of the above |
| Answer» C. saturated solution | |
| 892. |
In electrolytic cell electricity carries________________? |
| A. | spontaneous reaction |
| B. | non-wpontaneous reaction |
| C. | neutralization |
| D. | all of above |
| Answer» C. neutralization | |
| 893. |
Electricity in voltaic cell is produced due to_________________? |
| A. | neutralization |
| B. | oxidation |
| C. | reduction |
| D. | both B & C |
| Answer» E. | |
| 894. |
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 | |
| 895. |
In Galvanic cell electrons flow from anode to cathode through__________________? |
| A. | external electric circuit |
| B. | salt bridge |
| C. | movement of ions |
| D. | all of the above |
| Answer» B. salt bridge | |
| 896. |
The strength of solution of an element whose electrode potential is to be measured is________________? |
| A. | 2M |
| B. | 1N |
| C. | 1m |
| D. | 1M |
| Answer» E. | |
| 897. |
Which of the following cell is not rechargeable ? |
| A. | Lead storage battery |
| B. | Silver oxide cell |
| C. | Fuel cell |
| D. | Ni-Cd cell |
| Answer» C. Fuel cell | |
| 898. |
The important function of burning zone in the rotary kilm is __________________? |
| A. | to dry the moisture of slurry |
| B. | to decompose lime stone to unslaked lime |
| C. | combination of different oxides like CaO SiO2 Fe2O3 and Al2O3 |
| D. | to reduce the impurities |
| Answer» D. to reduce the impurities | |
| 899. |
Stronger the oxidizing agent greater is the________________? |
| A. | Oxidation potential |
| B. | Reduction potential |
| C. | Redox potential |
| D. | emf of cell |
| Answer» C. Redox potential | |
| 900. |
The degree of dissociation of week electrolyte increases as________________? |
| A. | Pressure increases |
| B. | Dilution decreases |
| C. | Dilution increases |
| D. | None |
| Answer» D. None | |