MCQOPTIONS
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MCQOPTIONS
This section includes 49 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following has strongest intermolecular forces of attraction? |
| A. | Hydrogen (H2) |
| B. | Chlorine (Cl2) |
| C. | Lodine (I2) |
| D. | Methane (CH4) |
| Answer» D. Methane (CH4) | |
| 2. |
Which has strongest bonding in the solid state? |
| A. | Hydrogen Chloride (HCI) |
| B. | Chlorine (Cl2) |
| C. | Xenon(Xe) |
| D. | Sodium Chloride (NaCI) |
| Answer» E. | |
| 3. |
When substance moves from a solid to a liquid state all of the following changes occur except |
| A. | Molecules become more disordered |
| B. | K.E of the molecules decreases |
| C. | Intermolecular forces become weaker |
| D. | Molecule become further separated |
| Answer» C. Intermolecular forces become weaker | |
| 4. |
When the atoms of third layer are arranged in such a way that they directly lie above the atoms of first layer then this arrangement is called |
| A. | ABAB (hexagonal) |
| B. | ABCABC (Cubic) |
| C. | Orthor hombic |
| D. | Rhombohedral |
| Answer» B. ABCABC (Cubic) | |
| 5. |
In order to mention the boiling point of water at 110?C the external pressure should be |
| A. | Between 760 torr and 1200 torr |
| B. | Between 200 torr and 760 torr |
| C. | 765 torr |
| D. | Any value of pressure |
| Answer» B. Between 200 torr and 760 torr | |
| 6. |
Which one is false for evaporation? |
| A. | Surface phenomenon |
| B. | Continuous |
| C. | Exothermic |
| D. | Cause cooling |
| Answer» D. Cause cooling | |
| 7. |
Vapour pressure of water at 100?C is |
| A. | 55 mm Hg |
| B. | 760 mm Hg |
| C. | 355 mm Hg |
| D. | 1489 mm Hg |
| Answer» C. 355 mm Hg | |
| 8. |
If we provide very high amount of heat to a liquid its boiling point will |
| A. | Increase |
| B. | Remains constant |
| C. | Decrease |
| D. | There will be no boiling |
| Answer» C. Decrease | |
| 9. |
Crystallites are present in |
| A. | Crystalline solids |
| B. | Amorphous solids |
| C. | Liquid crystals |
| D. | All of the above |
| Answer» C. Liquid crystals | |
| 10. |
A solid may be made up of |
| A. | Atoms |
| B. | Ions |
| C. | Molecules |
| D. | A b and c |
| Answer» E. | |
| 11. |
A malleable solid is one which can be |
| A. | Converted into wires |
| B. | Converted into thin sheets |
| C. | Melted easily |
| D. | All of the above |
| Answer» C. Melted easily | |
| 12. |
Amorphous substances posses |
| A. | No definite geometry |
| B. | No definite heat of fusion |
| C. | No sharp melting points |
| D. | All of the above |
| Answer» D. All of the above | |
| 13. |
Crystalline solids can be identified easily from their |
| A. | Sharp melting point |
| B. | Definite geometry |
| C. | Transition temperature |
| D. | Colour |
| Answer» B. Definite geometry | |
| 14. |
Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to |
| A. | More strength of H-bonding |
| B. | More strength of London forces |
| C. | Less polarizability |
| D. | All of the above |
| Answer» C. Less polarizability | |
| 15. |
Ice is ___________ crystal |
| A. | Metallic |
| B. | Molecular |
| C. | Covalent |
| D. | Ionic |
| Answer» C. Covalent | |
| 16. |
Select a pair of compounds which are isomorphic in nature. |
| A. | NaCI and KNO3 |
| B. | MgO and NaF |
| C. | KNO3 and MgO |
| D. | NaF and CaCO3 |
| Answer» C. KNO3 and MgO | |
| 17. |
The viscosity of solids is |
| A. | Infinite |
| B. | Negligible |
| C. | Medium |
| D. | No concept of viscosity in solid |
| Answer» B. Negligible | |
| 18. |
a?b?c ?????#90? is representation of crystal system |
| A. | Monoclinic |
| B. | Triclinic |
| C. | Hexagonal |
| D. | Trigonal |
| Answer» C. Hexagonal | |
| 19. |
The phenomenon in which a compound exists in two or more crystalline forms is called |
| A. | Isomorphism |
| B. | Polymorphism |
| C. | Anisotropy |
| D. | Allotropy |
| Answer» C. Anisotropy | |
| 20. |
Which solids are called true solids? |
| A. | Metallic |
| B. | Amorphous |
| C. | Crystalline |
| D. | Vitreous |
| Answer» D. Vitreous | |
| 21. |
Steam causes more sever burn than the boiling water because it possesses. |
| A. | Latent heat of fusion |
| B. | Latent heat of vaporization |
| C. | Latent heat of sublimation |
| D. | All of the above |
| Answer» C. Latent heat of sublimation | |
| 22. |
Bucky balls is an allotropic from of |
| A. | Sulphur |
| B. | Carbon |
| C. | Silica |
| D. | Tin |
| Answer» C. Silica | |
| 23. |
The conversion of vapours back into their liquid state is called |
| A. | Crystallization |
| B. | Evaporization |
| C. | Vaporization |
| D. | Condensation |
| Answer» E. | |
| 24. |
Formation of vapours from the surface of a liquid is called |
| A. | Vapourization |
| B. | Evaporation |
| C. | Condensation |
| D. | Cracking |
| Answer» C. Condensation | |
| 25. |
When water freezes at 0?C its density decreases due to |
| A. | Change of bond angles |
| B. | Cubic structure of ice |
| C. | Empty space present in the structure of ice |
| D. | Change of bond length |
| Answer» D. Change of bond length | |
| 26. |
The ttractive forces between the partial positive end of one molecule and partial negative end of other molecule are called |
| A. | Dipole-dipole forces |
| B. | Ion dipole-dipole forces |
| C. | London dispersion forces |
| D. | Debye forces |
| Answer» B. Ion dipole-dipole forces | |
| 27. |
The boiling point increases down the zero group element due to |
| A. | Ion dipole forces |
| B. | London forces |
| C. | Hydrogen bonding |
| D. | Dipole dipole forces |
| Answer» C. Hydrogen bonding | |
| 28. |
Vapour pressure is not affected by |
| A. | Surface area |
| B. | Temperature |
| C. | Intermolecular forces |
| D. | Atmospheric pressure |
| Answer» B. Temperature | |
| 29. |
Rising of a wetting liquid in a capillary tube is due to |
| A. | Surface tension |
| B. | Cohesive forces |
| C. | Adhesive forces |
| D. | Viscosity |
| Answer» D. Viscosity | |
| 30. |
Table salt crystallizes with a |
| A. | Face centered cubic lattice |
| B. | Body centered cubic lattice |
| C. | Simple cubic lattice |
| D. | Othorhombic lattice |
| Answer» C. Simple cubic lattice | |
| 31. |
The number of formula units in 29.25g of common salt |
| A. | 6.022 x 1023 |
| B. | 3.01 x 1023 |
| C. | 2 x NA |
| D. | 4 x 6.022 x 1023 |
| Answer» C. 2 x NA | |
| 32. |
During which process empty spaces between particles become minimum? |
| A. | Ionization |
| B. | Condensation |
| C. | Fusion |
| D. | Evaporation |
| Answer» C. Fusion | |
| 33. |
Liquid gets the shape of the container when it is poured into it. Which one of the following reasons justifies it? |
| A. | Liquid do not have definite shape |
| B. | Liquid do not have definite volume |
| C. | Lieuid is highly compressible |
| D. | Liquid molecules can slide over each other |
| Answer» E. | |
| 34. |
Which one of the following has highest volatility |
| A. | Diethyl ether |
| B. | Ethyl alcohol |
| C. | Water |
| D. | Ethylene glycol |
| Answer» B. Ethyl alcohol | |
| 35. |
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 | |
| 36. |
The number amino acid units for each turn of helix on average are |
| A. | 21 |
| B. | 23 |
| C. | 25 |
| D. | 27 |
| Answer» E. | |
| 37. |
Which one of the following does not show hydrogen bonding ? |
| A. | Water |
| B. | Ethyl alcohol |
| C. | Phenol |
| D. | Diethyl ether |
| Answer» E. | |
| 38. |
Liquid crystal is discovered by |
| A. | William Crooks |
| B. | Fredrack Reinitzer |
| C. | J.J Thomson |
| D. | Bravis |
| Answer» C. J.J Thomson | |
| 39. |
Hydrogen bonding is involved in |
| A. | Solubility |
| B. | Cleansing action of detergents |
| C. | Biological molecules |
| D. | All |
| Answer» E. | |
| 40. |
Which one is a conductor but is not malleable? |
| A. | Iron |
| B. | Graphite |
| C. | Silver |
| D. | Platinum |
| Answer» C. Silver | |
| 41. |
Actually the vapour pressure on the surface of liquid in the flask is equal to |
| A. | ? h |
| B. | Pa - ?h |
| C. | Pa + ?h |
| D. | Pt = Pa - ?h |
| Answer» D. Pt = Pa - ?h | |
| 42. |
Forces of attraction which may be present between all kinds of atoms and molecules are |
| A. | Intramolecular |
| B. | Intermolecular |
| C. | Van der Waal |
| D. | Dipole-induced dipole |
| Answer» D. Dipole-induced dipole | |
| 43. |
The density of water may be |
| A. | Equal to that of ice |
| B. | Greater than that of ice |
| C. | Less than that of ice |
| D. | All are possible |
| Answer» C. Less than that of ice | |
| 44. |
The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of |
| A. | Vaporization |
| B. | Evaporation |
| C. | Crystallization |
| D. | Sublimation |
| Answer» B. Evaporation | |
| 45. |
Isomorphic substances have |
| A. | Same physical and chemical properties |
| B. | Same physical and different chemical properties |
| C. | Different physical and same chemical properties |
| D. | Different physical and chemical properties |
| Answer» E. | |
| 46. |
If a physical and chemical change takes place at a constant pressure then the heat change during the process is called |
| A. | Heat of transition |
| B. | Heat of fusion |
| C. | Enthalpy change |
| D. | All of above |
| Answer» D. All of above | |
| 47. |
The pressure during the molar heat of fusion is kept |
| A. | 0 atmosphere |
| B. | One atmosphere |
| C. | 2 atmosphere |
| D. | 10 atmosphere |
| Answer» C. 2 atmosphere | |
| 48. |
The amount of heat absorbed when one mole of a liquid is changed into gas at its boiling point is |
| A. | Molar heat of sublimation |
| B. | Molar heat of fusion |
| C. | Molar heat of vapourization |
| D. | Latent heat of that liquid |
| Answer» D. Latent heat of that liquid | |
| 49. |
All the enthalpy changes are |
| A. | Negative |
| B. | Positive |
| C. | May or may not be a or b |
| D. | None |
| Answer» D. None | |