MCQOPTIONS
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MCQOPTIONS
This section includes 92 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Minerals are |
| A. | liquids |
| B. | inorganic solid |
| C. | gases |
| D. | all of the above |
| Answer» C. gases | |
| 2. |
The halogen being used as analgesic is |
| A. | chlorine |
| B. | bromine |
| C. | iodine |
| D. | fluorine |
| Answer» C. iodine | |
| 3. |
Which is the rarest naturally occurring element of earth? |
| A. | Gold |
| B. | Antimony |
| C. | Germanium |
| D. | Astatine |
| Answer» E. | |
| 4. |
The deficiency of which one of the following leads to dental caries? |
| A. | Iron |
| B. | Copper |
| C. | Fluorine |
| D. | Zinc |
| Answer» D. Zinc | |
| 5. |
Which among the following is an element? |
| A. | Alumina |
| B. | Brass |
| C. | Graphite |
| D. | Silica |
| Answer» D. Silica | |
| 6. |
Which one of the following elements exists in liquid state at room temperature ? |
| A. | Mercury |
| B. | Lead |
| C. | Sodium |
| D. | Calcium |
| Answer» B. Lead | |
| 7. |
Carborundum is a compound of |
| A. | Ca |
| B. | Ge |
| C. | Si |
| D. | S |
| Answer» D. S | |
| 8. |
The inert gas abundantly found in atmosphere is |
| A. | Xe |
| B. | Kr |
| C. | He |
| D. | Ar |
| Answer» E. | |
| 9. |
Which gas is used in filling electric bulbs? |
| A. | Neon |
| B. | Argon |
| C. | Radon |
| D. | Krypton |
| Answer» C. Radon | |
| 10. |
Which one of the following elements is a metalloid ? |
| A. | P |
| B. | Al |
| C. | As |
| D. | Po |
| Answer» D. Po | |
| 11. |
Which one of the following noble gases is not found in the atmosphere? |
| A. | Argon |
| B. | Krypton |
| C. | Radon |
| D. | Xenon |
| Answer» D. Xenon | |
| 12. |
Which one of the following metals occurs in nature in free state ? |
| A. | Gold |
| B. | Sodium |
| C. | Aluminium |
| D. | Copper |
| Answer» B. Sodium | |
| 13. |
At 30 C, which 3 metals are all liquids? |
| A. | Hg, Fe, Zn |
| B. | Hg, Sn, Pb |
| C. | Zn, Pb, Sn |
| D. | Hg, Ga, Cs |
| Answer» E. | |
| 14. |
The first metal used by man was |
| A. | gold |
| B. | silver |
| C. | copper |
| D. | iron |
| Answer» D. iron | |
| 15. |
Consider the following statements with reference to the periodic table of chemical element1. Ionisation potential gradually decreases along a period2. In a group of element, electron affinity decreases as the atomic weight increases3. Ina given period, electronegativity decrease as the atomic number increasesWhich of these statement (s) is/are correct ? |
| A. | 1 only |
| B. | 2 only |
| C. | 1 and 3 |
| D. | 2 and 3 |
| Answer» C. 1 and 3 | |
| 16. |
Which of the following ions will from most water soluble hydroxide ? |
| A. | K |
| B. | Ni |
| C. | Zn |
| D. | Al |
| Answer» B. Ni | |
| 17. |
Which is chemically most active non-metal ? |
| A. | F |
| B. | He |
| C. | N |
| D. | O |
| Answer» B. He | |
| 18. |
Which one of the following has largest size ? |
| A. | C |
| B. | N |
| C. | O |
| D. | F |
| Answer» B. N | |
| 19. |
Which of the following is the smallest cation ? |
| A. | Na |
| B. | Mg |
| C. | Li |
| D. | Be |
| Answer» E. | |
| 20. |
Which of the following has the smallest size ? |
| A. | Mg |
| B. | Na |
| C. | F |
| D. | Al |
| Answer» E. | |
| 21. |
Assertion : In the periodic table of chemical element, electron affinity is always found to increase from top to bottom in a groupReason (R) : In a group, the atomic radii generally increase from top to bottom |
| A. | Both A and R are individually true and R is the correct explanation of A |
| B. | Both A and R are individually true but R is not the correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» E. | |
| 22. |
Which of the following isoelectronic species has the largest size ? |
| A. | N |
| B. | Mg |
| C. | F |
| D. | Na |
| Answer» B. Mg | |
| 23. |
In the reaction :Zn +H2SO4 ZnSO4 + H2, Zn undergoes |
| A. | Oxidation |
| B. | Reduction |
| C. | Simple dissolution |
| D. | Double decomposition |
| Answer» D. Double decomposition | |
| 24. |
Which of the following is the most common element in the universe? |
| A. | Hydrogen |
| B. | Oxygen |
| C. | Nitrogen |
| D. | Carbon |
| Answer» B. Oxygen | |
| 25. |
Minerals |
| A. | liquids |
| B. | inorganic solid |
| C. | gases |
| D. | all of the above |
| Answer» C. gases | |
| 26. |
The deficiency of which one of the following leads to |
| A. | Iron |
| B. | Copper |
| C. | Fluorine |
| D. | Zinc |
| Answer» D. Zinc | |
| 27. |
Which among the following is an |
| A. | Alumina |
| B. | Brass |
| C. | Graphite |
| D. | Silica |
| Answer» D. Silica | |
| 28. |
Carborundum |
| A. | Ca |
| B. | Ge |
| C. | Si |
| D. | S |
| Answer» D. S | |
| 29. |
Which one of the following elements exists in |
| A. | Mercury |
| B. | Lead |
| C. | Sodium |
| D. | Calcium |
| Answer» B. Lead | |
| 30. |
Which gas is used in |
| A. | Neon |
| B. | Argon |
| C. | Radon |
| D. | Krypton |
| Answer» C. Radon | |
| 31. |
Which one of the following elements is a |
| A. | P |
| B. | Al |
| C. | As |
| D. | Po |
| Answer» D. Po | |
| 32. |
At |
| A. | Hg, Fe, Zn |
| B. | Hg, Sn, Pb |
| C. | Zn, Pb, Sn |
| D. | Hg, Ga, Cs |
| Answer» E. | |
| 33. |
The element that has the highest first ionization potential is |
| A. | Boron |
| B. | Nitrogen |
| C. | Oxygen |
| D. | Carbon |
| Answer» C. Oxygen | |
| 34. |
"Which elements are arranged in increasing order of atomic weight, every eighth element has properties similar to the first." This law had been given by |
| A. | Moseley |
| B. | Dobereiner |
| C. | Newland |
| D. | Lother-Mayer |
| Answer» D. Lother-Mayer | |
| 35. |
Which of the following among alkali metals is most reactive ? |
| A. | Na |
| B. | K |
| C. | Rb |
| D. | Cs |
| Answer» E. | |
| 36. |
Which among the following has the highest ionization potential ? |
| A. | Li |
| B. | B |
| C. | Ne |
| D. | F |
| Answer» D. F | |
| 37. |
Which of the following has the highest ionisation potential |
| A. | N |
| B. | C |
| C. | O |
| D. | F |
| Answer» E. | |
| 38. |
The screening effect on inner electrons of the nucleus causes |
| A. | Decrease in the ionisation energy |
| B. | Increase in the ionisation energy |
| C. | No effect on the ionisation energy |
| D. | Increase in the attraction of the nucleus to the electrons |
| Answer» D. Increase in the attraction of the nucleus to the electrons | |
| 39. |
Consider the following statements with reference to the periodic table of chemical element |
| A. | 1 only |
| B. | 2 only |
| C. | 1 and 3 |
| D. | 2 and 3 |
| Answer» C. 1 and 3 | |
| 40. |
Which of the following properties occurs in alkali metals ? |
| A. | Highest ionisation energy |
| B. | Largest atomic radil |
| C. | Highest density |
| D. | None of these |
| Answer» C. Highest density | |
| 41. |
The elements on the right side of the periodic table are |
| A. | Metals |
| B. | Metalloids |
| C. | Non-metals |
| D. | Transition elements |
| Answer» D. Transition elements | |
| 42. |
The highest metal is |
| A. | Li |
| B. | Mg |
| C. | Ca |
| D. | Na |
| Answer» B. Mg | |
| 43. |
The first elements of rare earth metal is |
| A. | Cerium |
| B. | Actinium |
| C. | Uranium |
| D. | Lanthanum |
| Answer» B. Actinium | |
| 44. |
Which of the following transition metal is in liquid state ? |
| A. | Chromium |
| B. | Cadmium |
| C. | Mercury |
| D. | Vanadium |
| Answer» D. Vanadium | |
| 45. |
Which one of the following electronic configurations exhibits metallic character ? |
| A. | 2, 7 |
| B. | 2, 8, 2 |
| C. | 2, 8, 4 |
| D. | 2, 8, 8 |
| Answer» C. 2, 8, 4 | |
| 46. |
The properties of elements of Mendeleev's periodic law were the periodic functions of their |
| A. | Atomic number |
| B. | Atomic weight |
| C. | Mass of the atom |
| D. | Shape of the atom |
| Answer» C. Mass of the atom | |
| 47. |
The long form of periodic table was developed by |
| A. | Bohr |
| B. | Mendeleey |
| C. | Range and Werner |
| D. | Rutherford |
| Answer» D. Rutherford | |
| 48. |
Metal with maximum density here is |
| A. | Fe |
| B. | Mo |
| C. | Hg |
| D. | Os |
| Answer» E. | |
| 49. |
Which substance is the most metallic ? |
| A. | Bi |
| B. | As |
| C. | Ab |
| D. | None of these |
| Answer» B. As | |
| 50. |
In the following four elements, the ionidation potential of which one is the highest ? |
| A. | Argon |
| B. | Barium |
| C. | Cesiu, |
| D. | Oxygen |
| Answer» B. Barium | |