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.
| 601. |
Carbonates of lithium are not stable like that of sodium due to________________? |
| A. | Low electronegativity |
| B. | Low electropositivity |
| C. | Low charge density |
| D. | Not known yet |
| Answer» C. Low charge density | |
| 602. |
Formula of haloform is_________________? |
| A. | HCOX |
| B. | CX4 |
| C. | CHX3 |
| D. | CH3X |
| Answer» D. CH3X | |
| 603. |
Which one of the following is not an alkali metal ? |
| A. | Francium |
| B. | Caesium |
| C. | Rubidium |
| D. | Radium |
| Answer» E. | |
| 604. |
Aldehyde and ketone have same general formula for homologous series_________________? |
| A. | CnH2nO2n |
| B. | CnH2n |
| C. | CnH2nO |
| D. | CnH2nOn+1 |
| Answer» D. CnH2nOn+1 | |
| 605. |
Formalin consists of mixture of formaldehyde methyl alcohol and water Percentage of water in it is________________? |
| A. | 60% |
| B. | 50% |
| C. | 52% |
| D. | 8% |
| Answer» D. 8% | |
| 606. |
Acetaldehyele cyanohydrin on acid hydrolysis yields___________________? |
| A. | Tartaric acid |
| B. | Propanoic acid |
| C. | Lactic acid |
| D. | Valeric acid |
| Answer» D. Valeric acid | |
| 607. |
Iodoform test can be used to distinguish between_________________? |
| A. | ethanol and methanol |
| B. | acetaldehyde and methanal |
| C. | acetone and diethyl ketone |
| D. | all of the above |
| Answer» E. | |
| 608. |
Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter? |
| A. | PdCl2 |
| B. | Cu2Cl2 |
| C. | CuCl2 |
| D. | PbCl2 |
| Answer» D. PbCl2 | |
| 609. |
Which one exhibits aldol condensation____________________? |
| A. | HCHO |
| B. | C6H5CHO |
| C. | Cl3CCHO |
| D. | CH3COCH3 |
| Answer» E. | |
| 610. |
Cannizaros reaction takes place through the transfer of ____________________ from complex anion? |
| A. | hydrogen ion |
| B. | hydride ion |
| C. | oxide ion |
| D. | methoxide ion |
| Answer» C. oxide ion | |
| 611. |
Acetone reacts with HCN to form a cyanohydrin. It is an example of________________? |
| A. | electronphilic addition |
| B. | electrophilic substitution |
| C. | nucleophilic addition |
| D. | nucleophilic substitution |
| Answer» D. nucleophilic substitution | |
| 612. |
Formalin is ___________ solution of formaldehyde in water? |
| A. | 10% |
| B. | 20% |
| C. | 40% |
| D. | 60% |
| Answer» D. 60% | |
| 613. |
Which of the following is not a use of formaldehyde ? |
| A. | in silvery mirror |
| B. | in making medicine urotropine |
| C. | in making throat lozenges |
| D. | in making acetic acid |
| Answer» E. | |
| 614. |
Which of the following is not a use of acetaldehyde ? |
| A. | formation of phenolic resins |
| B. | formation of mirror |
| C. | antiseptic inhalant |
| D. | formation of throat lozenges |
| Answer» E. | |
| 615. |
The carbon atom of carbonyl group is__________________? |
| A. | sp hybridized |
| B. | sp2 hybridized |
| C. | cp3 hybridized |
| D. | dsp2 hybridized |
| Answer» C. cp3 hybridized | |
| 616. |
Which of the following will have the highest boiling point ? |
| A. | methanol |
| B. | ethanal |
| C. | propanal |
| D. | hexanone |
| Answer» E. | |
| 617. |
Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________? |
| A. | Nylon 66 |
| B. | urotropine |
| C. | Aniline formaldehyde plastic |
| D. | Bakelite |
| Answer» E. | |
| 618. |
Which of the following reactions may be assoclated with aldehyde and ketone ? |
| A. | nucleophile addition |
| B. | polymerization |
| C. | oxidation |
| D. | all of the above |
| Answer» E. | |
| 619. |
Halides in which halogen atoms act as a bridge between two atoms of the other element are called___________________? |
| A. | Covalent halides |
| B. | Electronegative halides |
| C. | Polymeric halides |
| D. | Polymeric hydrides |
| Answer» D. Polymeric hydrides | |
| 620. |
Which of the following substances does not give iodoform test ? |
| A. | acetaldehyde |
| B. | ethyl alcohol |
| C. | methyl alcohol |
| D. | acetone |
| Answer» D. acetone | |
| 621. |
The term internal salt refers to_____________________? |
| A. | Acidic character of amino acids |
| B. | Basic character of amino acids |
| C. | Dipolar character of amino acids |
| D. | Non-polar structure of amino acids |
| Answer» D. Non-polar structure of amino acids | |
| 622. |
Which of the following reaction is not shown by ketones ? |
| A. | reaction with HCN |
| B. | reaction with NaHSO3 |
| C. | reaction with 2 4 dinitrophenyl hydrazine |
| D. | reaction with Fehling solution |
| Answer» E. | |
| 623. |
Which of the following aldehydes shows rapid reaction with sodium nitroprusside ? |
| A. | formaldehyde |
| B. | accetaldehyde |
| C. | benzaldehyde |
| D. | acetone |
| Answer» E. | |
| 624. |
An acid with unpleasant smell_________________? |
| A. | formic acid |
| B. | acetic acid |
| C. | propionic acid |
| D. | butyric acid |
| Answer» E. | |
| 625. |
The reaction of carboxylic acids with alcohols in presence of cone. H2SO4 is called _________________? |
| A. | esterification |
| B. | neutralization |
| C. | hydrolysis |
| D. | saponification |
| Answer» B. neutralization | |
| 626. |
Carboxylic acid on reduction with HI / phosphorous yields_________________? |
| A. | alkane |
| B. | alcohols |
| C. | aldehydes |
| D. | ketones |
| Answer» B. alcohols | |
| 627. |
The irritation caused by red ants bite is due to____________________? |
| A. | Lactic acid |
| B. | Formic acid |
| C. | Uric acid |
| D. | Acetic acid |
| Answer» C. Uric acid | |
| 628. |
Which of the following is not an amino acids_____________________? |
| A. | glumatic acid |
| B. | lactic acid |
| C. | aspartic acids |
| D. | glycine |
| Answer» C. aspartic acids | |
| 629. |
Acidic amino acids have________________? |
| A. | 2 amino groups and 1 carboxylic group |
| B. | 1 amino and 1 carboxylic groups |
| C. | 2 carboxylic groups and 1 amino group |
| D. | 2 amino and 2 carboxylic groups |
| Answer» D. 2 amino and 2 carboxylic groups | |
| 630. |
Carboxylic acid reacts with ammonia to form ammonium salts which on heating produces_______________? |
| A. | CO2 |
| B. | Alkane |
| C. | Ester |
| D. | Acidamide |
| Answer» E. | |
| 631. |
The complete reduction carboxylic acid results in the formation of________________? |
| A. | Alkyne |
| B. | Alkene |
| C. | Alkane |
| D. | Alcohol |
| Answer» D. Alcohol | |
| 632. |
Which of the following is the strongest acid ? |
| A. | Water |
| B. | Formic acid |
| C. | Acetic acid |
| D. | Propanoic acid |
| Answer» C. Acetic acid | |
| 633. |
Which one of the following acids is present in lemon juice ? |
| A. | Citric acid |
| B. | Benzoic acid |
| C. | Tartaric acid |
| D. | Oxalic acid |
| Answer» B. Benzoic acid | |
| 634. |
Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide ? |
| A. | carbonic acid |
| B. | ethanol |
| C. | acetic acid |
| D. | methanoic acid |
| Answer» D. methanoic acid | |
| 635. |
Essential amino acids are___________________? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» C. 15 | |
| 636. |
ppm means________________? |
| A. | parts of solute in 1000 parts of solvent |
| B. | parts of solvent in 1000 parts of solute |
| C. | parts of solute in one million parts of solution |
| D. | parts of solvent in one million parts of solute |
| Answer» D. parts of solvent in one million parts of solute | |
| 637. |
Picric acid is_________________? |
| A. | monocarboxylc acid |
| B. | dicarboxylic acid |
| C. | aromatic carboxylic acid |
| D. | none of these |
| Answer» E. | |
| 638. |
In which of the following pairs are elements belonging to the same group ? |
| A. | Boron & Beryllium |
| B. | Nitrogen & Phosphorous |
| C. | Magnesium & Aluminium |
| D. | Gallium & Helium |
| Answer» C. Magnesium & Aluminium | |
| 639. |
Hydrogen resembles with carbon because of having________________? |
| A. | Same number of electrons in the valence shell |
| B. | Similar physical state |
| C. | Remarkable reducing properties |
| D. | Homovalent (show same valency) |
| Answer» D. Homovalent (show same valency) | |
| 640. |
Iodine is solid due to_________________? |
| A. | Strong covalent bond |
| B. | Large value of dipole moment |
| C. | High polarizability |
| D. | Strong hydrogen bonding |
| Answer» D. Strong hydrogen bonding | |
| 641. |
Keeping in view the size of atom which order is correct one ? |
| A. | Mg > Sr |
| B. | Ba > Mg |
| C. | Lu > Ce |
| D. | C1 > I |
| Answer» C. Lu > Ce | |
| 642. |
Which one of the following is not a periodic property ? |
| A. | Melting point of elements |
| B. | Boiling point of elements |
| C. | Ionization energy of elements |
| D. | Coordination number of ions |
| Answer» E. | |
| 643. |
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 | |
| 644. |
Cannizzaros reaction is not given by__________________? |
| A. | formaldehyde |
| B. | acetaldehyde |
| C. | benzaldehyde |
| D. | trimethyl acetaldehyde |
| Answer» C. benzaldehyde | |
| 645. |
When – COOH is attached directly to the benzene ring the acid is called__________________? |
| A. | Aliphatic |
| B. | Alicyclic |
| C. | Carboxylic |
| D. | Aromatic |
| Answer» E. | |
| 646. |
Voltaic cell is a_________________? |
| A. | irreversible cell |
| B. | reversible cell |
| C. | alkaline cell |
| D. | all of the above |
| Answer» E. | |
| 647. |
In modern periodic table all the leements are arranged in ascending order of__________________? |
| A. | Valency |
| B. | Atomic mass |
| C. | Atomic number |
| D. | Valence electrons |
| Answer» D. Valence electrons | |
| 648. |
Any process of chemical decay of metals due to the action of surrounding medium is called__________________? |
| A. | activation |
| B. | enameling |
| C. | corrosion |
| D. | coating |
| Answer» D. coating | |
| 649. |
Which of the following always increases on going from top to bottom in a group ? |
| A. | Metallic character |
| B. | Electronegativity |
| C. | Oxidizing power |
| D. | Tendency to get reduced |
| Answer» B. Electronegativity | |
| 650. |
Among halogens the highest boiling point is of___________________? |
| A. | Flrorine |
| B. | Chlorine |
| C. | Bromine |
| D. | Iodine |
| Answer» E. | |