MCQOPTIONS
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MCQOPTIONS
This section includes 376 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The copper (Cu) which is used for electrical wiring should be pure up to |
| A. | 1 |
| B. | 0.99 |
| C. | 0.9999 |
| D. | 0.98 |
| Answer» D. 0.98 | |
| 2. |
The most commonly used polyester is known as |
| A. | Terylene |
| B. | nylon |
| C. | fat |
| D. | protein |
| Answer» B. nylon | |
| 3. |
Group IV element that acts as an insulator is |
| A. | Carbon (Diamond) |
| B. | Tin (Sn) |
| C. | Lead (Pb) |
| D. | Silicon (Si) |
| Answer» B. Tin (Sn) | |
| 4. |
Only one 'benzene ring' is present in compounds of |
| A. | aryl |
| B. | acryl |
| C. | carboxylic |
| D. | ketone |
| Answer» B. acryl | |
| 5. |
The distance between two nuclei of the same type of atom is called |
| A. | covalent radius |
| B. | atomic radius |
| C. | metallic radius |
| D. | ionic radius |
| Answer» B. atomic radius | |
| 6. |
Carothers was a great chemist but he was |
| A. | prone to depression |
| B. | swallowed cyanide |
| C. | committed suicide |
| D. | all of above |
| Answer» E. | |
| 7. |
All group IV elements form a compound with |
| A. | zinc |
| B. | copper |
| C. | chlorine |
| D. | sulfur |
| Answer» D. sulfur | |
| 8. |
Halogens are themselves reduced hence they are |
| A. | oxidizing agents |
| B. | reducing agents |
| C. | redox agents |
| D. | re-agents |
| Answer» B. reducing agents | |
| 9. |
Blue cheese has smell because of ketone |
| A. | heptan-2-one |
| B. | heptan-3-one |
| C. | heptan-2-ol |
| D. | hexa-2-one |
| Answer» B. heptan-3-one | |
| 10. |
Transition elements are mostly used in construction materials because they are |
| A. | hard only |
| B. | rigid only |
| C. | flammable |
| D. | hard and rigid |
| Answer» E. | |
| 11. |
The main product of calcium carbonate is |
| A. | lime |
| B. | carbonates |
| C. | calcium |
| D. | limestone |
| Answer» E. | |
| 12. |
The number of carbon atoms in the longest chain of 1 molecule is indicated in its |
| A. | stem |
| B. | molecular formula |
| C. | empirical formula |
| D. | skeletal formula |
| Answer» B. molecular formula | |
| 13. |
The forces between the diatomic halogens are |
| A. | Van der Waal's forces |
| B. | permanent dipole-dipole forces |
| C. | electrovalent forces |
| D. | temporary dipole forces |
| Answer» B. permanent dipole-dipole forces | |
| 14. |
Finite resources like metals can be conserved by |
| A. | recycling |
| B. | extracting |
| C. | oxidizing |
| D. | reducing |
| Answer» B. extracting | |
| 15. |
The size of an atom can be described with the help of |
| A. | atomic radius |
| B. | metallic radius |
| C. | covalent radius |
| D. | Van der Waal's radius |
| Answer» C. covalent radius | |
| 16. |
The Group-IV element that has the highest bond energy is |
| A. | C-C Bond |
| B. | Si-Si Bond |
| C. | Ge-Ge Bond |
| D. | O-O bond |
| Answer» B. Si-Si Bond | |
| 17. |
At room temperature, Group-IV tetrachlorides (-Cl₄) are |
| A. | crystals |
| B. | solid lumps |
| C. | liquids |
| D. | gases |
| Answer» D. gases | |
| 18. |
Hydrogen react following addition reactions with |
| A. | aldehydes only |
| B. | ketones only |
| C. | haloalkanes |
| D. | aldehydes and ketones |
| Answer» E. | |
| 19. |
The electronegativity of Sulfur (S₈) is |
| A. | 2.58 |
| B. | 2.2 |
| C. | 3.44 |
| D. | 3.04 |
| Answer» B. 2.2 | |
| 20. |
The gas which is slightly soluble in water is |
| A. | CO |
| B. | CO₂ |
| C. | CO₃⁻² |
| D. | carbon |
| Answer» C. CO₃⁻² | |
| 21. |
Materials should be conserved because of |
| A. | limited number of ores |
| B. | they are easily replaceable |
| C. | infinity production |
| D. | unlimited production |
| Answer» B. they are easily replaceable | |
| 22. |
In Group IV, the highest melting point is of |
| A. | Carbon(Diamond) |
| B. | Tin (Sn) |
| C. | Lead (Pb) |
| D. | Silicon (Si) |
| Answer» B. Tin (Sn) | |
| 23. |
C₇H₁₆ uses the stem name as |
| A. | hexa- |
| B. | Hepta- |
| C. | Dec- |
| D. | non- |
| Answer» C. Dec- | |
| 24. |
In Halogens, greater opportunities for instantaneous dipoles arise due to |
| A. | low atomic radii |
| B. | low boiling point |
| C. | greater number of electrons |
| D. | high melting point |
| Answer» D. high melting point | |
| 25. |
In a molecule of tertiary Halogenoalkanes, the carbon atom is bonded to |
| A. | 3 carbon atoms |
| B. | 2 carbon atoms |
| C. | 4 carbon atom |
| D. | 1 carbon atom |
| Answer» B. 2 carbon atoms | |
| 26. |
Aluminum chloride is sometimes represented as |
| A. | AlCl₃ |
| B. | AlCl₂ |
| C. | Al₂Cl₃ |
| D. | Al₆Cl₂ |
| Answer» B. AlCl₂ | |
| 27. |
In additional polymerization, a monomer with double bond will simply |
| A. | turn into single bond |
| B. | remain same |
| C. | break |
| D. | get rotated |
| Answer» B. remain same | |
| 28. |
Bromine (Br₂) is released during reactions as |
| A. | reddish brown gas |
| B. | blue gas |
| C. | white gas |
| D. | reddish green gas |
| Answer» B. blue gas | |
| 29. |
The optimum pH value for action of sulfur dioxide (SO₂) resistance of microbe growth, is less than |
| A. | 3 |
| B. | 4 |
| C. | 2 |
| D. | 1 |
| Answer» C. 2 | |
| 30. |
The Nucleophilic substitution reaction is slowest with |
| A. | iodoalkanes |
| B. | fluoroalkanes |
| C. | chloroalkanes |
| D. | bromoalkane |
| Answer» C. chloroalkanes | |
| 31. |
The highest melting point among the four elements given below is of |
| A. | Ca |
| B. | Sr |
| C. | Be |
| D. | Ba |
| Answer» B. Sr | |
| 32. |
Tin and lead have same metallic structure at |
| A. | high temperature |
| B. | low temperature |
| C. | room temperature |
| D. | never |
| Answer» D. never | |
| 33. |
Derivatives of phenol are |
| A. | trichlorophenol only |
| B. | Dettol only |
| C. | ethers |
| D. | trichlorophenol and Dettol |
| Answer» E. | |
| 34. |
Acidic foods are mostly preserved with the help of a solution made from |
| A. | sulfur dioxide |
| B. | ammonium nitrate |
| C. | ammonium phosphate |
| D. | ammonium sulfate |
| Answer» B. ammonium nitrate | |
| 35. |
Further addition of ethanol will lead to the different product as |
| A. | ethanoic acid |
| B. | ketones |
| C. | benzaldehyde |
| D. | aldehydes |
| Answer» B. ketones | |
| 36. |
What is true about Phenol? |
| A. | it is solid |
| B. | it is a crystalline solid |
| C. | it is a gas |
| D. | it is a liquid |
| Answer» C. it is a gas | |
| 37. |
The reaction involving the breakdown of the water molecule is known as |
| A. | heterolytic |
| B. | hydrolysis |
| C. | homolytic |
| D. | none of above |
| Answer» C. homolytic | |
| 38. |
Low boiling points of Halogens indicate that the molecular structure is |
| A. | giant metallic structure |
| B. | giant molecules |
| C. | simple molecules |
| D. | crystal lattice |
| Answer» D. crystal lattice | |
| 39. |
In Group IV, the lowest melting point is of |
| A. | Tin (Sn) |
| B. | Lead (Pb) |
| C. | Silicon (Si) |
| D. | Germanium (Ge) |
| Answer» B. Lead (Pb) | |
| 40. |
There is saving of 95% energy in recycling rather than extracting of material |
| A. | copper |
| B. | aluminum |
| C. | iron |
| D. | glass |
| Answer» C. iron | |
| 41. |
In Group-IV, the bond energy decreases as we move |
| A. | down the Group |
| B. | up the group |
| C. | diagonally |
| D. | across the period |
| Answer» B. up the group | |
| 42. |
Bhaskara suggested perpetual motion by explaining a wheel could run |
| A. | to and fro |
| B. | forever |
| C. | up and down |
| D. | down and up |
| Answer» C. up and down | |
| 43. |
Tetrachlorides (-Cl₄) are |
| A. | volatile |
| B. | simple covalent molecules |
| C. | tetrahedral |
| D. | all of above |
| Answer» E. | |
| 44. |
When calcium oxide is burned with clay its makes |
| A. | cement |
| B. | steel |
| C. | calcium carbonate |
| D. | bricks |
| Answer» B. steel | |
| 45. |
Kilns and furnaces are lined by magnesium oxide because of its high |
| A. | strength |
| B. | melting point |
| C. | boiling point |
| D. | acidic nature |
| Answer» C. boiling point | |
| 46. |
Chlorofluorocarbon (CFC) is non-toxic and non-flammable was said by chemist |
| A. | Thomas Medley |
| B. | Thomas jenny |
| C. | J.J Thomson |
| D. | Albert Einstein |
| Answer» B. Thomas jenny | |
| 47. |
The process of decomposition of calcium carbonate (CaCO₃) and formation of calcium oxide (CaO) and carbon dioxide (CO₂) takes place in |
| A. | furnace |
| B. | factory |
| C. | industry |
| D. | lime kiln |
| Answer» E. | |
| 48. |
John Lister in the 19th century used phenol as |
| A. | detergent |
| B. | anesthetic |
| C. | antiseptic |
| D. | chlorination |
| Answer» D. chlorination | |
| 49. |
Zinc (Zn) forms only one ion (Zn⁺²) by completing its |
| A. | 3d orbital |
| B. | 2d orbital |
| C. | 3s orbital |
| D. | 2s orbital |
| Answer» B. 2d orbital | |
| 50. |
Hydrogen Cyanide |
| A. | is highly toxic |
| B. | is colorless |
| C. | have smell of almonds |
| D. | all of above |
| Answer» E. | |