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.
| 651. |
Polyester resins are the product of the reaction of__________________? |
| A. | Dihydric alcohol and dicarboxylic aromatic acids |
| B. | Polyamines with aliphatic dicarboxylic acids |
| C. | Styrene in the presence of catalyst |
| D. | Epichlorohydrin with diphenylol propane |
| Answer» B. Polyamines with aliphatic dicarboxylic acids | |
| 652. |
Pollutants have adverse effect over_________________? |
| A. | Biosphere |
| B. | Ecosystem |
| C. | Both a & b |
| D. | Hydrosphere |
| Answer» C. Both a & b | |
| 653. |
Poisonous gas present in the exhaust fumes of a jet plane is__________? |
| A. | Flurocarbon |
| B. | Carbon monoxide |
| C. | Methane |
| D. | C2H2 |
| Answer» C. Methane | |
| 654. |
Plasma is used in_________________? |
| A. | Fluorescent bulb |
| B. | Neon signs |
| C. | Lasers |
| D. | All of these |
| Answer» E. | |
| 655. |
Planks theory says energy is emitted__________________? |
| A. | In continuous manner |
| B. | Discontinuous manner |
| C. | Simultaneously |
| D. | In the form of heat |
| Answer» C. Simultaneously | |
| 656. |
Picric acid is_________________? |
| A. | monocarboxylc acid |
| B. | dicarboxylic acid |
| C. | aromatic carboxylic acid |
| D. | none of these |
| Answer» E. | |
| 657. |
Pi bonds are produced by overlapping of__________________? |
| A. | Un-hybrid orbitals |
| B. | Hybrid orbitals |
| C. | Hybrid and un hybrid orbitals |
| D. | atomic orbital and hybrid orbital |
| Answer» B. Hybrid orbitals | |
| 658. |
Photographic plates are coated with a thin film of _________________? |
| A. | AgNO3 |
| B. | AgI |
| C. | AgCl |
| D. | AgBr |
| Answer» E. | |
| 659. |
Phosphorus is a Greek word and it means_________________? |
| A. | Light bearing |
| B. | Fire |
| C. | Impure |
| D. | Tetrahedral |
| Answer» B. Fire | |
| 660. |
Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________? |
| A. | Phosphine |
| B. | Phosphorus |
| C. | Water |
| D. | Phosphorus pentoxide |
| Answer» B. Phosphorus | |
| 661. |
Phosphorus helps in the growth of_________________? |
| A. | root |
| B. | leave |
| C. | stem |
| D. | seed |
| Answer» E. | |
| 662. |
Phosphoric acid is a weak acid and its basicity is____________________? |
| A. | 1 |
| B. | 3 |
| C. | zero |
| D. | 2 |
| Answer» C. zero | |
| 663. |
Phosphene gas will be produced if phosphorous acid is subjected to___________________? |
| A. | Oxidation |
| B. | Reduction |
| C. | Decomposition |
| D. | Both b & c |
| Answer» E. | |
| 664. |
Phenol was isolated by Runge from________________? |
| A. | vegetable oil |
| B. | coaltar |
| C. | wood |
| D. | none of these |
| Answer» C. wood | |
| 665. |
Phenanthrene is a fused polycyclic compound contains __________ benzene rings ? |
| A. | Two |
| B. | Three |
| C. | Four |
| D. | Five |
| Answer» C. Four | |
| 666. |
Pfund series are produced in the spectrum of hydrogen atom__________________? |
| A. | when electrons jump down to 2nd- orbit |
| B. | when electrons jump down to 3rd- orbit |
| C. | when electrons jump down to 4th- orbit |
| D. | when electrons jump down to 5th- orbit |
| Answer» E. | |
| 667. |
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 | |
| 668. |
Periodic table provides a basic framework to study elements with respect to their__________________? |
| A. | Physical properties |
| B. | Chemical properties |
| C. | Properties of their compounds |
| D. | All |
| Answer» E. | |
| 669. |
Percentage of sulfuric acid in lead accumulator is__________________? |
| A. | 40% |
| B. | 25% |
| C. | 30% |
| D. | 50% |
| Answer» D. 50% | |
| 670. |
Percentage of lead in lead pencil is________? |
| A. | Zero |
| B. | 20 |
| C. | 80 |
| D. | 70 |
| Answer» B. 20 | |
| 671. |
Percentage of calcium in calcium carbonate is___________________? |
| A. | 80% |
| B. | 30% |
| C. | 40% |
| D. | 20% |
| Answer» D. 20% | |
| 672. |
Pentane and 2-methyl butance have the same_______________? |
| A. | Boiling point |
| B. | Melting point |
| C. | Percentage composition |
| D. | Structural formula |
| Answer» D. Structural formula | |
| 673. |
Parke’s process is used in the extraction of________? |
| A. | Iron |
| B. | Sodium |
| C. | Silver |
| D. | Zinc |
| Answer» D. Zinc | |
| 674. |
Paramagnetic behaviour of substance is measured by a balance called___________________? |
| A. | Analytical balance |
| B. | Guoys balance |
| C. | Electrical balance |
| D. | Single beam balance |
| Answer» C. Electrical balance | |
| 675. |
P2O5 is a hygroscopic powder which sublimes at______________? |
| A. | 260°C |
| B. | 360°C |
| C. | 630°C |
| D. | 620°C |
| Answer» C. 630°C | |
| 676. |
Ozonolysis of benzene produces___________________? |
| A. | Glycol |
| B. | Glyoxal |
| C. | Vicinal diol |
| D. | Both B & C |
| Answer» C. Vicinal diol | |
| 677. |
Ozone hole is substantial depletion of ozone in every year during__________________? |
| A. | Aug – Nov |
| B. | Sep – Nov |
| C. | Nov – Dec |
| D. | Dec – Jan |
| Answer» C. Nov – Dec | |
| 678. |
Oxygen (molecular weight = 32) diffuses at a rate of 10cm3/min under the same conditions of temperature and pressure how fast will hydrogen (molecular weight = 2) diffuse ? |
| A. | 20cm3/min |
| B. | 40cm3/min |
| C. | 160cm3/min |
| D. | 2.5cm3/min |
| Answer» C. 160cm3/min | |
| 679. |
Oxygen does not react with all except_________________? |
| A. | Alkali |
| B. | Acid |
| C. | Water |
| D. | Metals |
| Answer» E. | |
| 680. |
Oxygen and sulphur resemble in all except________________? |
| A. | Electronic conviguration of valence shell electrons |
| B. | Show allotropy |
| C. | Polymeric |
| D. | Show same oxidation state |
| Answer» E. | |
| 681. |
Oxidation state of an atom represents____________________? |
| A. | Number of electrons gained |
| B. | Number of electrons lost |
| C. | Apparent charge in compound |
| D. | Its vacancies |
| Answer» D. Its vacancies | |
| 682. |
Oxidation state +1 for phosphorous is found in___________? |
| A. | H3PO3 |
| B. | H3PO4 |
| C. | H3PO2 |
| D. | H2P2O7 |
| Answer» D. H2P2O7 | |
| 683. |
Oxidation of primary alcohol gives________________? |
| A. | ketone |
| B. | Aldehyde |
| C. | Alkene then – COOH |
| D. | Ester |
| Answer» C. Alkene then – COOH | |
| 684. |
Orthoboric acid is 2.6% soluble in water at 40?C and ___________at 107°C. |
| A. | 26% |
| B. | 27% |
| C. | 37% |
| D. | <2.6% |
| Answer» D. <2.6% | |
| 685. |
Orgosterol is__________________? |
| A. | Orgocalciferol |
| B. | Vitamin D2 |
| C. | Sterol |
| D. | all of the above |
| Answer» D. all of the above | |
| 686. |
Organic compounds that are essentially nonpolar and exhibit weak intermolecular forces have________________? |
| A. | Low melting points |
| B. | Low vapour pressure |
| C. | High boiling points |
| D. | High electrical conductivity |
| Answer» B. Low vapour pressure | |
| 687. |
Organic compounds are soluble in ____________________? |
| A. | polar solvent |
| B. | non-polar solvent |
| C. | alkalies |
| D. | water |
| Answer» C. alkalies | |
| 688. |
Order of ease of halogenation in alkane is________________? |
| A. | I2>Cl2>Br2>F2 |
| B. | F2>Cl2>I2>Br2 |
| C. | F2>Cl2>Br2>I2 |
| D. | Cl2>F2>Br2>I2 |
| Answer» D. Cl2>F2>Br2>I2 | |
| 689. |
Orbitals of same energy produced after mixing of orbitals of different energy are called __________________? |
| A. | Degenerate orbitals |
| B. | Generate orbitals |
| C. | Hybrid orbitals |
| D. | Zeeman orbitals |
| Answer» B. Generate orbitals | |
| 690. |
Only sigma bonds are present in__________________? |
| A. | propene |
| B. | butanoic acid |
| C. | butanal |
| D. | ethoxy ethane |
| Answer» E. | |
| 691. |
Only London dispersion forces are present among the_________________? |
| A. | Molecules of water in liquid state |
| B. | Atoms of helium in gaseous state at high temperature |
| C. | Molecules of hydrogen chloride gas |
| D. | Molecules of solid iodine |
| Answer» E. | |
| 692. |
One of the outstanding features of boron is its ability to form__________________? |
| A. | Molecular addition compounds |
| B. | Molecular crystals |
| C. | Semiconductors |
| D. | Ionic compounds |
| Answer» B. Molecular crystals | |
| 693. |
One mole of an ideal gas at 546.5 K under 2 atm pressure has a volume of________________? |
| A. | 22.414 m³ |
| B. | 44.828 dm³ |
| C. | 22.414 dm³ |
| D. | 11.212 cm³ |
| Answer» D. 11.212 cm³ | |
| 694. |
One mole of CO2 contains? |
| A. | 6.022 x 1023 atoms of oxygen |
| B. | 22-gram electrons |
| C. | 6.022 x 1023 atms of carbon |
| D. | both B. & C. |
| Answer» E. | |
| 695. |
One fathom is equal to:__________? |
| A. | 6 feet |
| B. | 6 meters |
| C. | 60 feet |
| D. | 100 cm |
| Answer» B. 6 meters | |
| 696. |
on sp3 hybridization ________________? |
| A. | All p-orbitals are involved |
| B. | One s and 3 p-orbitals are involved |
| C. | one p-orbital is involved |
| D. | four p-orbitals are involved |
| Answer» C. one p-orbital is involved | |
| 697. |
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 | |
| 698. |
On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________? |
| A. | pink |
| B. | black |
| C. | yellow |
| D. | brick red |
| Answer» E. | |
| 699. |
Octane number can be improved by________________? |
| A. | Isomerization |
| B. | Adding (C2H5)4 Pb |
| C. | Adding (CH3)4 Pb |
| D. | All |
| Answer» E. | |
| 700. |
Octane number 2 2 4-trimethyl pentane is________________? |
| A. | 100 |
| B. | 90 |
| C. | 80 |
| D. | 70 |
| Answer» B. 90 | |