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.
| 651. |
Which of the following ion is stable in aqueous solution ? |
| A. | H+ |
| B. | H- |
| C. | Cl- |
| D. | All are stable |
| Answer» D. All are stable | |
| 652. |
The scientist who did not contribute in the construction of periodic table ? |
| A. | Al-Razi |
| B. | Moseley |
| C. | Dobereiner |
| D. | Democritus |
| Answer» E. | |
| 653. |
Melting points of VII-A group elements down the group ____________________? |
| A. | Increase |
| B. | Decrease |
| C. | Remain constant |
| D. | No regular trend |
| Answer» B. Decrease | |
| 654. |
A catalyst can not effect__________________? |
| A. | Products |
| B. | Chemical equilibrium |
| C. | Reactants |
| D. | both A & B |
| Answer» E. | |
| 655. |
Concept of Triads was introduced by_______________? |
| A. | Dobereiner |
| B. | Newland |
| C. | Mendeleev |
| D. | Al-Razi |
| Answer» B. Newland | |
| 656. |
Which order of ionization energy is correct_________________? |
| A. | Mg P |
| B. | Mg > A1 |
| C. | both A & B |
| D. | None of these |
| Answer» C. both A & B | |
| 657. |
Inner transition elements are called _________________? |
| A. | Lanthanides |
| B. | Actinides |
| C. | Rare earth metals |
| D. | All |
| Answer» E. | |
| 658. |
Shielding effect across the period_________________? |
| A. | Increases |
| B. | Decreases |
| C. | Can not be predicted |
| D. | Remains constant |
| Answer» E. | |
| 659. |
Sum of exponents of molar concentration is called___________________? |
| A. | Order of reaction |
| B. | Molecularity |
| C. | Rate of reaction |
| D. | Average of reaction |
| Answer» B. Molecularity | |
| 660. |
Elements with similar chemical properties appear in the_________________? |
| A. | Same family |
| B. | Same period |
| C. | p block elements |
| D. | Right upper corner |
| Answer» B. Same period | |
| 661. |
Ionization energy depends upon____________________? |
| A. | Nuclear charge |
| B. | Atomic size |
| C. | Shielding effect |
| D. | I.E depends upon all of the above and nature of orbital |
| Answer» E. | |
| 662. |
Each catalyst has_________________? |
| A. | Specificity |
| B. | Special structure |
| C. | Its own Ea |
| D. | all of above |
| Answer» E. | |
| 663. |
End name of enzyme is___________________? |
| A. | yl |
| B. | ase |
| C. | one |
| D. | al |
| Answer» C. one | |
| 664. |
Co-enzymes are_________________? |
| A. | Non proteineous |
| B. | Proteineous |
| C. | sugars |
| D. | lipids |
| Answer» B. Proteineous | |
| 665. |
Which of the following possesses maximum hydration energy ? |
| A. | Na+ |
| B. | K+ |
| C. | Mg+2 |
| D. | Ca+2 |
| Answer» D. Ca+2 | |
| 666. |
For determining the order of reaction we use__________________? |
| A. | Refractometric method |
| B. | Dilatometric method |
| C. | Optical activity method |
| D. | Half life method |
| Answer» E. | |
| 667. |
Apparent charge on atom in molecule is___________________? |
| A. | valency |
| B. | coordination number |
| C. | oxidation number |
| D. | charge number |
| Answer» D. charge number | |
| 668. |
On increasing the temperature the rate of reaction increases mainly because_________________? |
| A. | The activation energy of the reaction increases |
| B. | Concentration of the reacting molecules increases |
| C. | Collision frequency increases |
| D. | None of these |
| Answer» D. None of these | |
| 669. |
When a graph is plotted between 1/T on X-axis and log k on y-axis a straight line is obtained with a negative slope which has two end in__________________? |
| A. | I and II quadrant |
| B. | II and III quadrant |
| C. | III and IV quadrant |
| D. | II and IV quadrant |
| Answer» E. | |
| 670. |
In rate expression the concentration of reactants is negative. It shows_______________? |
| A. | Concentration of reactant does not change |
| B. | Concentration of product increases |
| C. | Concentration of reactant decreases |
| D. | Concentration of reactant increases |
| Answer» D. Concentration of reactant increases | |
| 671. |
Biocatalytical proteins are_________________? |
| A. | Enzymes |
| B. | Substrate |
| C. | Lipids |
| D. | any of above |
| Answer» B. Substrate | |
| 672. |
Rate of reaction when concentration of reactants are taken as unity is called_________________? |
| A. | Arrhenius constant |
| B. | Molecularity |
| C. | Specific rate constant |
| D. | Ideal rate constant |
| Answer» D. Ideal rate constant | |
| 673. |
Rate of disappearance of reactant is equal to_________________? |
| A. | Rate of reaction |
| B. | Rate of formation of product |
| C. | Energy released during reaction |
| D. | A and B |
| Answer» B. Rate of formation of product | |
| 674. |
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 | |
| 675. |
Which one of the following sets consists of all coinage metals ? |
| A. | Cu Hg Au |
| B. | Cu Ag Au |
| C. | Ag Au Hg |
| D. | Cu Fe Au |
| Answer» C. Ag Au Hg | |
| 676. |
When catalysts and reactants are in more than one phase it is________________? |
| A. | Homogeneous catalysis |
| B. | Heterogeneous catalysis |
| C. | Catalysis |
| D. | Ea |
| Answer» C. Catalysis | |
| 677. |
The rate of reaction___________________? |
| A. | Increases as the reaction proceeds |
| B. | Decreases as the reaction proceeds |
| C. | Remains the same as the reaction proceeds |
| D. | May decrease or increase as the reaction proceeds |
| Answer» C. Remains the same as the reaction proceeds | |
| 678. |
The value of activation energy is primarily determined by_______________? |
| A. | Temperature |
| B. | Effective collision |
| C. | Concentration of reactants |
| D. | Chemical nature of reactants and products |
| Answer» C. Concentration of reactants | |
| 679. |
Which order of reaction obeys the relation t1/2 = 1/Ka____________________? |
| A. | First order |
| B. | Second order |
| C. | Third order |
| D. | Zero order |
| Answer» C. Third order | |
| 680. |
The specific rate constant of a first order reaction depends on the________________? |
| A. | Time |
| B. | Concentration of the reactant |
| C. | Temperature |
| D. | Concentration of the product |
| Answer» D. Concentration of the product | |
| 681. |
Spontaneous reactions are_______________? |
| A. | Moderate |
| B. | Slow |
| C. | Fast |
| D. | not natural |
| Answer» D. not natural | |
| 682. |
Unit of rate of reaction is_________________? |
| A. | Moles dm-3 sec-1 |
| B. | Moles dm-3 |
| C. | Moles sec-1 |
| D. | Mol-1 dm3 sec-1 |
| Answer» B. Moles dm-3 | |
| 683. |
Which of the following potassium fertilizers are more useful for horticultural crops tobacco & potatoes ? |
| A. | KCI |
| B. | KNO3 |
| C. | K2SO4 |
| D. | KMnO4 |
| Answer» C. K2SO4 | |
| 684. |
Which of the following fertilizers is not useful for paddy rice ? |
| A. | urea |
| B. | DAP |
| C. | Ammonium sulphate |
| D. | Ammonium nitrate |
| Answer» E. | |
| 685. |
The element that act as anode always have ______________ position in electrochemical cell? |
| A. | higher |
| B. | lower |
| C. | in middle |
| D. | no effect of position |
| Answer» B. lower | |
| 686. |
Which one of the following set of raw material is most suitable for manufacture of urea ? |
| A. | CH4 N2 and CO2 |
| B. | H2 N2 and CO |
| C. | H2 CO2 and H2O |
| D. | H2O N2 and H2 |
| Answer» B. H2 N2 and CO | |
| 687. |
Argillaceous material does not include________________? |
| A. | vlay |
| B. | marine shells |
| C. | slate |
| D. | blast furnace slag |
| Answer» C. slate | |
| 688. |
The nutrients which are required in very small amount for the normal growth of plants are called_________________? |
| A. | nitrogenous fertilizers |
| B. | micronutrients |
| C. | phosphorus fertilizer |
| D. | all of the above |
| Answer» C. phosphorus fertilizer | |
| 689. |
The percentage of nitrogen in urea is________________? |
| A. | 36% |
| B. | 46% |
| C. | 56% |
| D. | 66% |
| Answer» C. 56% | |
| 690. |
Cement is a mixture of________________? |
| A. | clay and clinker |
| B. | clay lime stone and gypsum |
| C. | lime stone and gypsum |
| D. | lime stone and clay |
| Answer» C. lime stone and gypsum | |
| 691. |
Cement is a mixture of so many compounds roasted in rotary kiln. Which substances has greater percentage ? |
| A. | Lime (CaO) |
| B. | Silica (SiO2) |
| C. | Alumina (Al2O3) |
| D. | Magnesia (MgO) |
| Answer» B. Silica (SiO2) | |
| 692. |
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 | |
| 693. |
Which sequence of steps is correct for the manufacture of cement ? |
| A. | crushing heating mixing grinding |
| B. | crushing mixing heating grinding and mixing |
| C. | crushing grinding mixing heating |
| D. | mixing heating grinding crushing |
| Answer» D. mixing heating grinding crushing | |
| 694. |
Nylon is obtained by heating___________________? |
| A. | Acrylic acid |
| B. | Epichlorohydrin |
| C. | Vinyl chloride |
| D. | Adipic acid with hexamethylene diamine |
| Answer» E. | |
| 695. |
Amylose is__________________? |
| A. | Soluble in water |
| B. | Insoluble in water |
| C. | Soluble in alcohol |
| D. | Partially soluble in alcohol |
| Answer» B. Insoluble in water | |
| 696. |
Carbohydrates are polyhydroxy compounds of___________________? |
| A. | Glucose |
| B. | Glyceraldehydes |
| C. | Oligosaccharides |
| D. | Aldehydes and ketones |
| Answer» E. | |
| 697. |
All proteins yield ___________ upon complete hydrolysis? |
| A. | Nitrogen |
| B. | Amino acids |
| C. | Carbon and hydrogen |
| D. | Sulphur |
| Answer» C. Carbon and hydrogen | |
| 698. |
Regular coiling or zigzagging of polypeptide through hydrogen bonding is its_______________? |
| A. | Quantum structure |
| B. | Secondary structure |
| C. | Tertiary structure |
| D. | Primary structure |
| Answer» C. Tertiary structure | |
| 699. |
Compounds attracted by applied strong magnetic field are called__________________? |
| A. | diamagnetic |
| B. | paramagnetic |
| C. | good conductor |
| D. | ferromagnetic |
| Answer» C. good conductor | |
| 700. |
Which of the following is typical transition metal ? |
| A. | Sc |
| B. | Y |
| C. | Cd |
| D. | Co |
| Answer» E. | |