MCQOPTIONS
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MCQOPTIONS
This section includes 30 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Identify the IUPAC name of the following structure. \[H-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-OH\] |
| A. | Pentanone |
| B. | Butyric acid |
| C. | Physical change |
| D. | Butanone |
| Answer» B. Butyric acid | |
| 2. |
Which property of methane helps it to be used as a fuel? |
| A. | It burns exothermically. |
| B. | It is a gas. |
| C. | Change in size is a physical change. |
| D. | It has a low boiling point. |
| Answer» B. It is a gas. | |
| 3. |
Match the entries of Column - I with those in Column - II. Column - I Column - IIa.Hexane1.\[{{C}_{4}}{{H}_{10}}\]b.Ethane2.\[{{C}_{6}}{{H}_{12}}\]c.Pentene3.\[{{C}_{5}}{{H}_{10}}\]d.Hexane4.\[{{C}_{2}}{{H}_{6}}\]e.Butane5.\[{{C}_{6}}{{H}_{14}}\] |
| A. | a-5, b-4, c-3, d-1, e-2 |
| B. | a-3, b-4, c-2, d-5, e-1 |
| C. | (ii) and (iii) only |
| D. | a-5, b-2, c-1, d-4, e-3 |
| Answer» D. a-5, b-2, c-1, d-4, e-3 | |
| 4. |
Identify the molecular formulae of the acid and the alcohol from which an ester can be prepared. |
| A. | \[C{{H}_{3}}COOH+{{C}_{2}}{{H}_{5}}OH\] |
| B. | \[HCOOH+{{C}_{2}}{{H}_{5}}OH\] |
| C. | Cranial and spinal nerves |
| D. | \[C{{H}_{3}}C{{H}_{2}}COOH+C{{H}_{3}}OH\] |
| Answer» B. \[HCOOH+{{C}_{2}}{{H}_{5}}OH\] | |
| 5. |
Which set contains all the possible combustion products of methane? |
| A. | Carbon, carbon dioxide, carbon monoxide and water |
| B. | Carbon, carbon monoxide and hydrogen |
| C. | Blood cells |
| D. | Carbon monoxide and water |
| Answer» B. Carbon, carbon monoxide and hydrogen | |
| 6. |
\[\text{IUPAC}\] name of \[\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,H-C-C{{H}_{3}}}{\mathop{\underset{||}{\mathop{\text{C}{{\text{H}}_{\text{3}}}-C-\text{H}}}\,}}\,\] |
| A. | unsymmetrical dimethyl ethylene |
| B. | symmetrical dimethyl ethylene |
| C. | Chloroplast |
| D. | trans-2-butene |
| Answer» E. | |
| 7. |
IUPAC name of the compound\[H-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-{{(C{{H}_{2}})}_{4}}COOH\]is |
| A. | hexanoic acid \[-5-al-1\] |
| B. | 6-oxohexanoic acid |
| C. | Lysosomes |
| D. | none of these |
| Answer» C. Lysosomes | |
| 8. |
Which of the following represents the correct IUPAC name of the compound\[C{{H}_{2}}=CH-C{{H}_{2}}Cl\]? |
| A. | Allyl chloride |
| B. | 1-chloro-3-propene |
| C. | (i), (ii) and (iii) only |
| D. | Vinyl chloride |
| Answer» D. Vinyl chloride | |
| 9. |
Chemically similar compounds differing by -\[C{{H}_{2}}\]unit are called |
| A. | Allotrops |
| B. | Homologues |
| C. | Golgi complex |
| D. | Tautomers |
| Answer» C. Golgi complex | |
| 10. |
Reagent which can distinguish propanal and propanone is |
| A. | Tollen's reagent |
| B. | Benedict reagent |
| C. | Euglena, Saccharomyces, Allium |
| D. | All of these |
| Answer» E. | |
| 11. |
The main source of organic compounds is |
| A. | coaltar |
| B. | petroleum |
| C. | A protozoan |
| D. | none of the above |
| Answer» C. A protozoan | |
| 12. |
The compound (s) used as an anti-freeze in radiators of automobiles is/are |
| A. | methyl alcohol |
| B. | ethyl alcohol |
| C. | Unicellular, prokaryotic protozoan |
| D. | methyl alcohol + water |
| Answer» D. methyl alcohol + water | |
| 13. |
Which one of the following is an allotrope of carbon? |
| A. | Glass |
| B. | Graphite |
| C. | (ii) and (iii) |
| D. | Both [b] and [c] |
| E. | None of these |
| Answer» E. None of these | |
| 14. |
Which of the following is the molecular mass of\[{{C}_{3}}{{H}_{7}}OH\]? |
| A. | 32 |
| B. | 46 |
| C. | Nucleoplasm |
| D. | 66 |
| E. | None of these |
| Answer» D. 66 | |
| 15. |
Butane with the molecular formula C H has: |
| A. | 10 covalent bonds |
| B. | 13 covalent bonds |
| C. | Chromoplast |
| D. | 8 covalent bonds |
| E. | None of these |
| Answer» C. Chromoplast | |
| 16. |
Which of the following is the molecular mass of \[{{C}_{2}}{{H}_{5}}OH\]? |
| A. | 32 |
| B. | 46 |
| C. | Respiration |
| D. | 18 |
| E. | None of these |
| Answer» C. Respiration | |
| 17. |
Read the given statements and mark the correct option. Statement 1: Homologous series is a series of compounds having similar chemical properties. Statement 2: The successive members of the homologous series differ by - \[C{{H}_{2}}\] group. |
| A. | Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. |
| B. | Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. |
| C. | Plastid |
| D. | Both statements 1 and 2 are false. |
| Answer» C. Plastid | |
| 18. |
Which among the following will undergo substitution reaction in the presence of sunlight? |
| A. | \[{{C}_{3}}{{H}_{6}}\] |
| B. | \[{{C}_{3}}{{H}_{8}}\] |
| C. | Nuclear membrane |
| D. | All the above |
| E. | None of these |
| Answer» C. Nuclear membrane | |
| 19. |
Detergents are sodium salts of long chain of: |
| A. | Ketones |
| B. | Aldehydes |
| C. | (iii) and (iv) |
| D. | Acetic acid |
| E. | None of these |
| Answer» D. Acetic acid | |
| 20. |
The name of the compound \[C{{H}_{3\,}}-C{{H}_{2}}\,-CHO\]is: |
| A. | Propanal |
| B. | Propanone |
| C. | Both into and out of the cells. |
| D. | Ethanal |
| E. | None of these |
| Answer» B. Propanone | |
| 21. |
An ester is formed when: |
| A. | Ethane reacts with acetic acid. |
| B. | Methanol reacts with sodium. |
| C. | Cells Tissues Organ system Organisms Organs |
| D. | Bleaching powder reacts with ethanol. |
| E. | None of these |
| Answer» D. Bleaching powder reacts with ethanol. | |
| 22. |
A compound formed after the oxidation of ethanol with alkaline potassium permanganate will: |
| A. | Turn blue litmus to red |
| B. | Turn red litmus to blue |
| C. | Mitochondria |
| D. | Both [a] and [c] |
| E. | None of these |
| Answer» E. None of these | |
| 23. |
Which one of the following acids is an example of monocarboxylic acids? |
| A. | Formic acid |
| B. | Acetic acid |
| C. | Leucoplasts |
| D. | Both [a] and [b] |
| E. | None of these |
| Answer» E. None of these | |
| 24. |
The gas evolved when ethanol reacts with sodium is: |
| A. | Carbon dioxide |
| B. | Hydrogen |
| C. | (I - D), (II - C), (III - B), (IV - A) |
| D. | Nitrogen |
| E. | None of these |
| Answer» C. (I - D), (II - C), (III - B), (IV - A) | |
| 25. |
The given hydrocarbon is: \[C{{H}_{3}}-\,C{{H}_{2}}\,-C{{H}_{2}}\,-C{{H}_{2}}-C{{H}_{3}}\] |
| A. | Butane |
| B. | Pentane |
| C. | A protozoan |
| D. | Pentyne |
| E. | None of these |
| Answer» C. A protozoan | |
| 26. |
Which one of the following is an example of alkyl group? |
| A. | \[{{C}_{2}}{{H}_{6}}\] |
| B. | \[C{{H}_{4}}\] |
| C. | Gene |
| D. | \[{{C}_{3}}{{H}_{4}}\] |
| E. | None of these |
| Answer» D. \[{{C}_{3}}{{H}_{4}}\] | |
| 27. |
Which one of the following statements is incorrect? |
| A. | An unsaturated hydrocarbon containing a triple bond is an alkyne. |
| B. | An unsaturated hydrocarbon containing a single bond is an alkane. |
| C. | Nucleolus |
| D. | All the above |
| E. | None of these |
| Answer» C. Nucleolus | |
| 28. |
Saanvi wrote IUPAC names of few compounds asked by her science teacher The teacher told her that one of the compounds was not correctly named. Identify the one with wrong name. |
| A. | \[C{{H}_{3}}C{{H}_{2}}\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}:\]butanone |
| B. | \[C{{H}_{3}}C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-H:\]Propanal |
| C. | Butanoic acid |
| D. | \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-OH:\]Butanol |
| Answer» D. \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-OH:\]Butanol | |
| 29. |
Which of the following is the IUPAC name of the formula\[{{C}_{4}}{{H}_{10}}\]? |
| A. | Ethane |
| B. | Butane |
| C. | It is odourless. |
| D. | Butyne |
| E. | None of these |
| Answer» C. It is odourless. | |
| 30. |
Which of the following are alkanes? |
| A. | \[{{C}_{2}}{{H}_{6}}\] |
| B. | \[{{C}_{3}}{{H}_{8}}\] |
| C. | a-5, b-4, c-3, d-2, e-1 |
| D. | All the above |
| E. | None of these |
| Answer» E. None of these | |