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.
| 551. |
The cooling of molten urea by air in the tower is called______________________? |
| A. | prilling |
| B. | evaporation |
| C. | condensation |
| D. | crystallization |
| Answer» B. evaporation | |
| 552. |
The conversion of vapours back into their liquid state is called__________________? |
| A. | crystallization |
| B. | evaporization |
| C. | vaporization |
| D. | condensation |
| Answer» E. | |
| 553. |
The concept of telluric helix was developed by___________? |
| A. | Lother Meyer |
| B. | A.E de Chancourtois |
| C. | Newland |
| D. | Dobereiner |
| Answer» C. Newland | |
| 554. |
The compounds in which water molecules are added are called_______________? |
| A. | Hydrated ions |
| B. | double salts |
| C. | hydrates |
| D. | complexes |
| Answer» D. complexes | |
| 555. |
The compound or complex ion which has a ring in its structure__________________? |
| A. | polydentate ligand |
| B. | chelate |
| C. | monodentate ligand |
| D. | hydrate |
| Answer» C. monodentate ligand | |
| 556. |
The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________? |
| A. | Ethylene iodide |
| B. | Ethylene bromide |
| C. | Ethylene chloride |
| D. | Ethylene fluoride |
| Answer» C. Ethylene chloride | |
| 557. |
The compound (CH3)3COH according to IUPAC is known as ___________? |
| A. | Tert-Butanol |
| B. | 2,2-Dimethyl-propanol |
| C. | Tert Alcohol |
| D. | 1,1- Diethylethanol |
| Answer» C. Tert Alcohol | |
| 558. |
The composition of mixture of clay and lime stone in the raw for cement material is __________________? |
| A. | 75% lime stone and 25% clay |
| B. | 25% lime stone and 75% clay |
| C. | 15% lime stone and 55% clay |
| D. | 55% lime stone and 15% clay |
| Answer» B. 25% lime stone and 75% clay | |
| 559. |
The composition of ‘ Golden spangles is_________? |
| A. | PbCrO4 |
| B. | PbI2 |
| C. | As2Cr2O7 |
| D. | BaCrO4 |
| Answer» B. PbI2 | |
| 560. |
The composition of brown ring in nitrate test is_________________? |
| A. | FeSO4.No |
| B. | FeSO4.No2 |
| C. | FeSO4.No3 |
| D. | FeSO4.N2o |
| Answer» B. FeSO4.No2 | |
| 561. |
The component of solution which is in smaller amount is called_________________? |
| A. | solvent |
| B. | solute |
| C. | phase |
| D. | ion |
| Answer» C. phase | |
| 562. |
The complete reduction carboxylic acid results in the formation of________________? |
| A. | Alkyne |
| B. | Alkene |
| C. | Alkane |
| D. | Alcohol |
| Answer» D. Alcohol | |
| 563. |
The common thing in phthalic acid and oxalic acid is that both are_________________? |
| A. | Aromatic |
| B. | Dicarboxylic |
| C. | Hydrocarbons |
| D. | Strong acids |
| Answer» C. Hydrocarbons | |
| 564. |
The common oxidation state of lanthanides is_________? |
| A. | +3 |
| B. | +2 |
| C. | +1 |
| D. | +4 |
| Answer» B. +2 | |
| 565. |
The common name of propane 1 3-dioic is_________________? |
| A. | Oxalic acid |
| B. | Aromatic acid |
| C. | Malonic acid |
| D. | Fumaric acid |
| Answer» D. Fumaric acid | |
| 566. |
The common name of propane -1 3-dioic acid is____________________? |
| A. | Oxalic acid |
| B. | Succinic acid |
| C. | Malonic acid |
| D. | Fumaric acid |
| Answer» D. Fumaric acid | |
| 567. |
The coloured glassy mass in borax bead test is due to the formation of___________________? |
| A. | metal borate |
| B. | metal meta borate |
| C. | metal boride |
| D. | metal silicate |
| Answer» C. metal boride | |
| 568. |
The colour of chlorine gas is_______________? |
| A. | pale yellow |
| B. | freenish yellow |
| C. | reddish brown |
| D. | grayish black |
| Answer» C. reddish brown | |
| 569. |
The chemical formula of sodium hypochlorite is________________? |
| A. | NaCLO |
| B. | NaClO2 |
| C. | NaClO3 |
| D. | NaClO4 |
| Answer» B. NaClO2 | |
| 570. |
The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:_______? |
| A. | Bromine |
| B. | Fluorine |
| C. | Chlorine |
| D. | Sulphur |
| Answer» E. | |
| 571. |
The chemical composition of cinnabar is__________________? |
| A. | ZnS |
| B. | PbS |
| C. | HgS |
| D. | FeS |
| Answer» D. FeS | |
| 572. |
The central atom along with ligands is called____________________? |
| A. | complex ion |
| B. | coordination sphere |
| C. | ligand |
| D. | complex compound |
| Answer» C. ligand | |
| 573. |
The carbon-carbon bond strength is maximum in__________? |
| A. | CH3CH3 |
| B. | CH2=CH2 |
| C. | Benzene |
| D. | Cyclohexane |
| Answer» B. CH2=CH2 | |
| 574. |
The carbon atom of carbonyl group is__________________? |
| A. | sp hybridized |
| B. | sp2 hybridized |
| C. | cp3 hybridized |
| D. | dsp2 hybridized |
| Answer» C. cp3 hybridized | |
| 575. |
The by-product of the process of Saponification is___________? |
| A. | Methanol |
| B. | Glycol |
| C. | Glycerol |
| D. | Sodium hydroxide |
| Answer» D. Sodium hydroxide | |
| 576. |
The Branch of chemistry dealing with brewing and distilling is called _______ ? |
| A. | Zygology |
| B. | Zymology |
| C. | Zymurgy |
| D. | Zootaxy |
| Answer» D. Zootaxy | |
| 577. |
The bond length of C=C is___________? |
| A. | 1.20A° |
| B. | 1.34A° |
| C. | 1.54A° |
| D. | 1.68A° |
| Answer» E. | |
| 578. |
The bond angle between hybrid orbitals in methane CH3 is___________? |
| A. | 115.5° |
| B. | 109.5° |
| C. | 105. 7° |
| D. | 180° |
| Answer» C. 105. 7° | |
| 579. |
The boiling point increases down the zero group element due to_________________? |
| A. | Ion dipole forces |
| B. | London forces |
| C. | Hydrogen bonding |
| D. | Dipole dipole forces |
| Answer» C. Hydrogen bonding | |
| 580. |
The best method of preparation of alkyl halides is a reaction of alcohol with__________________? |
| A. | Zn / HCI |
| B. | SOCl2 / Pyridine |
| C. | PCI3 |
| D. | PCI5 |
| Answer» C. PCI3 | |
| 581. |
The basic hydrolysis of ethyl acetate produces__________________? |
| A. | ethanol |
| B. | acetic acid |
| C. | ethanol and acetic acid |
| D. | ethanol and sodium acetate |
| Answer» E. | |
| 582. |
The balanced chemical equation for the reaction which occurs when Be is added to water is____________? |
| A. | Be+2H2O?Be (OH)2+H2 |
| B. | Be+H2O?Be (OH)2+H2 |
| C. | Be+H2O?[Be (OH)4]+2+H2 |
| D. | no reaction |
| Answer» E. | |
| 583. |
The average salinity of sea water is________? |
| A. | 3% |
| B. | 3.5% |
| C. | 2.5% |
| D. | 2% |
| Answer» C. 2.5% | |
| 584. |
The atoms of same element having same atomic number but different mass number are called____________________? |
| A. | Isobars |
| B. | Isomers |
| C. | Isotopes |
| D. | Isotropes |
| Answer» D. Isotropes | |
| 585. |
The atomic radii decreases by increasing atomic number in________________? |
| A. | Alkali metal |
| B. | Alkaline earth metal |
| C. | Elements from Li to Ne |
| D. | Halogens |
| Answer» D. Halogens | |
| 586. |
The atomic number of an element having maximum number of unpaired electrons in p-subshell is_______________? |
| A. | 7 |
| B. | 10 |
| C. | 12 |
| D. | 16 |
| Answer» B. 10 | |
| 587. |
The anhydride of HCIO4 is_________________? |
| A. | Cl2O |
| B. | Cl2O6 |
| C. | ClO2 |
| D. | Cl2O7 |
| Answer» E. | |
| 588. |
The amount of Zinc (at. Wt=65) necessary to produce 224 ml of H2 by the reaction with an acid will be______? |
| A. | 0.065gm |
| B. | 0.65gm |
| C. | 6.5gm |
| D. | 7.5gm |
| Answer» E. | |
| 589. |
The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is_____________________? |
| A. | Molar heat of sublimation |
| B. | Molar heat of fusion |
| C. | Molar heat of vapourization |
| D. | Latent heat of that liquid |
| Answer» D. Latent heat of that liquid | |
| 590. |
The aliphatic monocarboxylic acids are obtained by the hydrolysis of________________? |
| A. | proteins and oild |
| B. | fats and proteins |
| C. | fats and oils |
| D. | all above |
| Answer» D. all above | |
| 591. |
The addition of a catalyst to the reaction system__________________? |
| A. | Increases the rate of forward reaction only |
| B. | Increases the rate of reverse reaction |
| C. | Increases the rate of forward but decreases the rate of backward reaction |
| D. | Increases the rate of forward as well as backward reaction equally |
| Answer» E. | |
| 592. |
The acid which is used as ink remover is_________________? |
| A. | Oxalic acid |
| B. | Succinic acid |
| C. | Adipic acid |
| D. | Acetic acid |
| Answer» B. Succinic acid | |
| 593. |
The absolute value of charge on electron was determined by ________ ? |
| A. | J.J.Thomson |
| B. | Chadwick |
| C. | Rutherford |
| D. | Robert Millikan |
| Answer» E. | |
| 594. |
Secondary cell is_____________________? |
| A. | rechargeable |
| B. | non rechargeable |
| C. | electrolytic cell |
| D. | Daniel cell |
| Answer» B. non rechargeable | |
| 595. |
Second ionization potential of alkali metals are very high due to_______________? |
| A. | being s-block elements |
| B. | inert gas configurations |
| C. | ns1 electronic configuration |
| D. | being metals |
| Answer» C. ns1 electronic configuration | |
| 596. |
Saponification is the hydrolysis of fat or oil with an__________________? |
| A. | Acid |
| B. | Alkali |
| C. | Enzyme and alkali |
| D. | Enzyme and acid |
| Answer» C. Enzyme and alkali | |
| 597. |
Salt bridge transfers_______________? |
| A. | electrons |
| B. | anion |
| C. | current |
| D. | ions |
| Answer» E. | |
| 598. |
Safe and the most reliable method of drying crystals is through_________________? |
| A. | Filter paper |
| B. | Vacuum desiccators |
| C. | Oven |
| D. | None of these |
| Answer» C. Oven | |
| 599. |
Sabatier Senderns reaction involve _____________ in presence of Ni? |
| A. | Aalkene & H2 |
| B. | alkene & O2 |
| C. | alkene & N2 |
| D. | alkyne & Cl2 |
| Answer» B. alkene & O2 | |
| 600. |
Rutherfords planet like structure was defective and unsatisfactory because_________________? |
| A. | Moving e- accelerate towards the nucleus |
| B. | Continuous spectrum |
| C. | behavior of electron remain unexplained |
| D. | all |
| Answer» E. | |