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.
| 701. |
Octane number 2 2 4-trimethyl pentane is__________________? |
| A. | 100 |
| B. | 90 |
| C. | 80 |
| D. | 70 |
| Answer» B. 90 | |
| 702. |
Nylon is obtained by heating___________________? |
| A. | Acrylic acid |
| B. | Epichlorohydrin |
| C. | Vinyl chloride |
| D. | Adipic acid with hexamethylene diamine |
| Answer» E. | |
| 703. |
Number of moles in 1 kg of solvent is called_________________? |
| A. | normality |
| B. | molarity |
| C. | molality |
| D. | mole fraction |
| Answer» D. mole fraction | |
| 704. |
Nucleic acids direct the synthesis of__________________? |
| A. | Glucose |
| B. | Triglycerides |
| C. | Proteins |
| D. | All |
| Answer» D. All | |
| 705. |
Nucleic acids were first demonstrated in_________________? |
| A. | Pus cells |
| B. | Sperm heads |
| C. | 1872 |
| D. | all of the above |
| Answer» B. Sperm heads | |
| 706. |
Non-stoichiometric compounds of transition elements are called___________________? |
| A. | hydrates |
| B. | hydrides |
| C. | binary compounds |
| D. | interstitial compounds |
| Answer» E. | |
| 707. |
Non-metals usually form _________________ oxides? |
| A. | Acidic |
| B. | Amphoteric |
| C. | Neutral |
| D. | All of the above |
| Answer» B. Amphoteric | |
| 708. |
Noble gases are so called zero group because they have:_________? |
| A. | Zero Valency |
| B. | Zero Electronegativity |
| C. | Zero Electron Affinity |
| D. | Both A and B |
| E. | All of these |
| Answer» E. All of these | |
| 709. |
Noble gases are named so because they are__________________? |
| A. | less reactive |
| B. | Zero group elements |
| C. | Having completely filled valence shell |
| D. | All |
| Answer» E. | |
| 710. |
Nitronium ion is___________________? |
| A. | NO3 |
| B. | NO |
| C. | NO2- |
| D. | NO2+ |
| Answer» E. | |
| 711. |
Nitration of chlorobenzene gives___________________? |
| A. | o – chloronitrobenzene |
| B. | p – chloronitrobenzene |
| C. | m – chloronitrobenzene |
| D. | A & B |
| Answer» E. | |
| 712. |
Nitrates of which pair of elements give different products on thermal decomposition ? |
| A. | Na K |
| B. | Mg Ca |
| C. | Li Na |
| D. | Li Ca |
| Answer» D. Li Ca | |
| 713. |
Nitrates of which pair gives different products on thermal decomposition___________________? |
| A. | Na K |
| B. | Mg Ca |
| C. | Li Na |
| D. | Li Ca |
| Answer» D. Li Ca | |
| 714. |
Newspaper can be recycled again and again how many times ? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 715. |
Neutrons moving with an energy of 1.2 MeV are called_______________? |
| A. | Fast neutrons |
| B. | Slow neutrons |
| C. | Moderate neutrons |
| D. | All are possible |
| Answer» B. Slow neutrons | |
| 716. |
Negative log of mular concentration of H+ ions is called___________________? |
| A. | pH |
| B. | pOH |
| C. | pKa |
| D. | pKw |
| Answer» B. pOH | |
| 717. |
Ncleophilic addition reactions are catalysed__________________? |
| A. | Acid |
| B. | Base |
| C. | Both A and B |
| D. | None |
| Answer» D. None | |
| 718. |
NaOH is named as caustic soda because________________? |
| A. | It corrodes the organic tissues |
| B. | It is used in soda water |
| C. | It reacts with chlorine gas |
| D. | It reacts with fats to form soap |
| Answer» B. It is used in soda water | |
| 719. |
Mostly ionic compound are produced in between elements of_________________? |
| A. | IA and VIA |
| B. | IA IIA and VIIA |
| C. | IB and VIIB |
| D. | IA and IB |
| Answer» C. IB and VIIB | |
| 720. |
Mostly elements have fractional atomic masses because of______________________? |
| A. | mass of an atom itself is in fraction |
| B. | atomic masses are average masses of isobars |
| C. | atmoic masses are average masses of isotopes proportional to their relative abundance |
| D. | atmoic masses are average masses of isotopes |
| Answer» D. atmoic masses are average masses of isotopes | |
| 721. |
Most of thermodynamic parameters are_________________? |
| A. | system |
| B. | surrounding |
| C. | phase |
| D. | state functions |
| Answer» E. | |
| 722. |
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 | |
| 723. |
Molozonide is unstable and changes into ozonide on_________________? |
| A. | reduction |
| B. | oxidation |
| C. | hydrolysis |
| D. | rearrangement |
| Answer» E. | |
| 724. |
moles of each aluminium and oxygen react with each other to produce aluminium oxide. The amount of product formed is______________________? |
| A. | 0.18 mole |
| B. | 0.27 mole |
| C. | 0.24 mole |
| D. | 0.09 mole |
| Answer» B. 0.27 mole | |
| 725. |
Molecular orbitals are filled according to _________________? |
| A. | Auf bau principle |
| B. | Hunds rule |
| C. | Paulis Exclusion principle |
| D. | All these |
| Answer» E. | |
| 726. |
Molecular orbital which have higher energy than atomic orbitals is called___________________? |
| A. | Bonding molecular orbital |
| B. | Antibonding molecular orbital |
| C. | Hybrid orbital |
| D. | Super atomic orbital |
| Answer» C. Hybrid orbital | |
| 727. |
Molecular orbital Theory is also called_________? |
| A. | Bonding theory |
| B. | Band theory |
| C. | Antibondingtheory |
| D. | π and σ bonding theory |
| Answer» D. π and σ bonding theory | |
| 728. |
Molecular mass of water (18g) means__________________? |
| A. | 1-mole molecules of water |
| B. | 1-gram molecule of water |
| C. | 3-gram atoms |
| D. | all |
| Answer» E. | |
| 729. |
Molecular ions are formed by passing______________________? |
| A. | High energy electron beam |
| B. | ? – particle |
| C. | X-rays |
| D. | All of the above |
| Answer» E. | |
| 730. |
Molar heat of vaporization of water is_________________? |
| A. | 40.7 KJ/mole |
| B. | 40.7 J/mole |
| C. | 40.7 cal/mole |
| D. | 40.7 Kcal/mole |
| Answer» B. 40.7 J/mole | |
| 731. |
Modern periodic table has been divided in ___________ blocks? |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 7 |
| Answer» C. 8 | |
| 732. |
Mixtures which distill over without change in composition called___________________? |
| A. | zeotropic mixture |
| B. | azeotropic mixture |
| C. | amphoteric mixture |
| D. | ideal solution |
| Answer» C. amphoteric mixture | |
| 733. |
Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from_______________? |
| A. | acetylene |
| B. | N-hexane |
| C. | Benzene sulphonic acid |
| D. | Sodium benzoate |
| Answer» C. Benzene sulphonic acid | |
| 734. |
Milikan used ______________ in his atomizer? |
| A. | Milk |
| B. | Honey |
| C. | Oil |
| D. | Water |
| Answer» D. Water | |
| 735. |
Michael Faraday discovered benzene in the gas which was produced by destructive distillation of vegetable oil that is done in________________? |
| A. | The presence of Oxygen |
| B. | The presence of Hydrogen |
| C. | The absence of Oxygen |
| D. | The presence of excessive Oxygen |
| Answer» D. The presence of excessive Oxygen | |
| 736. |
Methyl alcohol is not used__________________? |
| A. | As a solvent |
| B. | As an antifreezing agent |
| C. | As a substitute for petrol |
| D. | For denaturing of ethyl alcohol |
| Answer» D. For denaturing of ethyl alcohol | |
| 737. |
Methyl alcohol is not used as___________________? |
| A. | a solvent |
| B. | an anti freezing agent |
| C. | a substitute for petrol |
| D. | for denaturing of ethyl alcohol |
| Answer» D. for denaturing of ethyl alcohol | |
| 738. |
Methane is used in power generation in chemical industries being a__________________? |
| A. | natural gas |
| B. | good caloric value |
| C. | cheaper |
| D. | All |
| Answer» D. All | |
| 739. |
Methanol can be obtained from_________________? |
| A. | water gas |
| B. | destructive distillation of wood |
| C. | methane |
| D. | all |
| Answer» E. | |
| 740. |
Metallic crystals are soluble in________________? |
| A. | Polar solvent |
| B. | Non polar solvent |
| C. | Fused metal |
| D. | None |
| Answer» D. None | |
| 741. |
Metallic characters of alkali metals_____________________? |
| A. | Increase down the group |
| B. | Decrease down the group |
| C. | No regular trend |
| D. | Remain same |
| Answer» B. Decrease down the group | |
| 742. |
Melting points of VII-A group elements down the group ____________________? |
| A. | Increase |
| B. | Decrease |
| C. | Remain constant |
| D. | No regular trend |
| Answer» B. Decrease | |
| 743. |
Measurement of the degree of polarity is___________________? |
| A. | Electron affinity |
| B. | Ionic character |
| C. | Ionization energy |
| D. | Dipole moment |
| Answer» E. | |
| 744. |
Mass spectrometer is used to determine Mass number of isotopes and___________________? |
| A. | Atomic number |
| B. | Relative abundance |
| C. | Electronic configuration |
| D. | All of the above |
| Answer» C. Electronic configuration | |
| 745. |
Marsh gas is_______? |
| A. | Nitrogen |
| B. | Ethane |
| C. | Methane |
| D. | Hydrogen |
| Answer» D. Hydrogen | |
| 746. |
Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ? |
| A. | The nature of its oxides |
| B. | The charge on its ions |
| C. | The formula of its oxide |
| D. | Its number of isotopes |
| Answer» E. | |
| 747. |
Major cause of SO2 on global scale is__________________? |
| A. | volcanoes |
| B. | electric sparks |
| C. | combustion |
| D. | all |
| Answer» B. electric sparks | |
| 748. |
Main source of organic compounds is__________________? |
| A. | Animal |
| B. | Fossil |
| C. | Coal |
| D. | Plants |
| Answer» B. Fossil | |
| 749. |
Magnetic quantum number specifies___________? |
| A. | Size of orbitals |
| B. | Shape of orbitals |
| C. | Orientation of orbitals |
| D. | All of the above |
| Answer» D. All of the above | |
| 750. |
Magnesium metal does not burn in the vessel containing_______________? |
| A. | N2 |
| B. | O2 |
| C. | N2 and O2 |
| D. | Ne |
| Answer» E. | |