MCQOPTIONS
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MCQOPTIONS
This section includes 1315 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which one is a soluble salt inH2O |
| A. | CuS |
| B. | Zn(OH)2 |
| C. | CaCl2 |
| D. | PbCl2 |
| Answer» D. PbCl2 | |
| 2. |
The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is |
| A. | Dalton's law |
| B. | Gay Lussac's law |
| C. | Henry's law |
| D. | Raoult's law |
| Answer» D. Raoult's law | |
| 3. |
The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of |
| A. | an addition reaction |
| B. | a condensation reaction |
| C. | an oxidation reaction |
| D. | an elimination reaction |
| Answer» C. an oxidation reaction | |
| 4. |
The main active constituent of tea and coffee is |
| A. | nicotine |
| B. | chlorophyll |
| C. | caffeine |
| D. | aspirin |
| Answer» D. aspirin | |
| 5. |
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is |
| A. | helium |
| B. | ozone |
| C. | oxygen |
| D. | methane |
| Answer» C. oxygen | |
| 6. |
The ionic radii of N3-, O2-, F- and Na+ follows the order |
| A. | N3- > O2- > F- > Na+ |
| B. | N3- > Na+ > O2- > F- |
| C. | Na+ > O2- > N3- > F- |
| D. | O2- > F- > Na+ > N3- |
| Answer» B. N3- > Na+ > O2- > F- | |
| 7. |
Zeolite is |
| A. | hydrated ferric oxide |
| B. | hydrated sodium aluminium silicate |
| C. | sodium hexameta phosphate |
| D. | sodium tetra borate |
| Answer» C. sodium hexameta phosphate | |
| 8. |
Yeast used in making bread |
| A. | acts as a catalyst for fermentation. |
| B. | does not help the process of fermentation |
| C. | makes it tasty |
| D. | acts as a preservative |
| Answer» B. does not help the process of fermentation | |
| 9. |
Why is Carbon Monoxide a pollutant ? |
| A. | Reacts with haemoglobin |
| B. | Makes nervous system inactive |
| C. | It reacts with Oxygen |
| D. | It inhibits glycolysis |
| Answer» B. Makes nervous system inactive | |
| 10. |
Why is argon gas used along with tungsten wire in an electric bulb? |
| A. | To increase the life of the bulb |
| B. | To reduce the consumption of electricity |
| C. | To make the emitted light colored |
| D. | To reduce the cost of the bulb |
| Answer» B. To reduce the consumption of electricity | |
| 11. |
Why do atoms bond? |
| A. | To reduce potential energy and gain stability |
| B. | To make atoms |
| C. | To increase potential energy and lose stability |
| D. | To increase potential energy and gain stability |
| Answer» B. To make atoms | |
| 12. |
Why does carbon tetrachloride have no dipole moment? |
| A. | Because of same size of carbon and chlorine atoms |
| B. | Because of regular tetrahedral structure |
| C. | Because of planar structure |
| D. | Because of similar electron affinities of carbon and chlorine |
| Answer» C. Because of planar structure | |
| 13. |
Who was the first man to go to space? |
| A. | Yuri Gagarin |
| B. | Yuri Rontgen |
| C. | Yuris Cui |
| D. | Yuris Mahatinn |
| Answer» B. Yuri Rontgen | |
| 14. |
Who stated the following law : 'The properties of the elements are the periodic function of their atomic masses'? |
| A. | Dobereiner |
| B. | Moseley |
| C. | Newlands |
| D. | Mendeleev |
| Answer» E. | |
| 15. |
Who predicted the existence of some yet to be discovered elements on the basis of gaps in his periodic table?_x005F_x000D_ |
| A. | Mendeleev |
| B. | Dobereiner |
| C. | Newlands |
| D. | |
| Answer» B. Dobereiner | |
| 16. |
Who present the theory of radioactive disintegration |
| A. | Rutherford and Soddy |
| B. | Soddy and Fajan |
| C. | Thomson and Rutherford |
| D. | Hahn and strassman |
| Answer» B. Soddy and Fajan | |
| 17. |
Who is the father of modern chemistry? |
| A. | Priestley |
| B. | Lavoisier |
| C. | Dalton |
| D. | Mendeleeff |
| Answer» C. Dalton | |
| 18. |
Who formulated ‘the atomic theory’ of a matter? |
| A. | Avogadro |
| B. | Dalton |
| C. | Newton |
| D. | Pascal_x005F_x000D_ |
| Answer» C. Newton | |
| 19. |
Who invented the modern periodic table? |
| A. | Faraday |
| B. | Mendeleev |
| C. | Newton |
| D. | Bohr |
| Answer» C. Newton | |
| 20. |
Who first discovered the every eighth element had properties similar to that of the first?_x005F_x000D_ |
| A. | Newlands |
| B. | Moseley |
| C. | Dobereiner |
| D. | Mendeleev |
| Answer» B. Moseley | |
| 21. |
Who among the following laid the foundation of chemical sciences by establishing two important laws of chemical combination? |
| A. | Joseph L. Proust |
| B. | Antoine L. Lavoisier |
| C. | Ernest Rutherford |
| D. | Democritus |
| Answer» C. Ernest Rutherford | |
| 22. |
White phosphorous is stored in:_x005F_x000D_ |
| A. | Oxygen |
| B. | Alcohol |
| C. | Hydrogen |
| D. | Water |
| Answer» E. | |
| 23. |
Which type of reaction occurs when carbon burns in oxygen to give carbo dioxide?_x005F_x000D_ |
| A. | Addition reaction |
| B. | Substition reaction |
| C. | Combustion reaction |
| D. | Decomposition reaction |
| Answer» D. Decomposition reaction | |
| 24. |
Which type of molecule is CF4? |
| A. | nonpolar, with a symmetrical distribution of charge |
| B. | polar, with an asymmetrical distribution of charge |
| C. | nonpolar, with an asymmetrical distribution of charge |
| D. | polar, with a symmetrical distribution of charge |
| Answer» B. polar, with an asymmetrical distribution of charge | |
| 25. |
Which was not produced by volcanic outgassing? |
| A. | Carbon dioxide |
| B. | Water vapor |
| C. | Sulfur |
| D. | Oxygen |
| Answer» E. | |
| 26. |
Which type of Ethanol is made from sources like molasses, sugarcane, sugar beet, sorghum and edible oil seeds?_x005F_x000D_ |
| A. | 2G ethanol |
| B. | 1G ethanol |
| C. | Clean ethanol |
| D. | 3G ethanol |
| Answer» C. Clean ethanol | |
| 27. |
Which type of bond is found in sodium bromide? |
| A. | Ionic |
| B. | Covalent |
| C. | Polar covalent |
| D. | None of the above |
| Answer» B. Covalent | |
| 28. |
Which term describes an enzyme? |
| A. | reactant |
| B. | catalyst |
| C. | substrate |
| D. | product |
| Answer» C. substrate | |
| 29. |
Which substance contains metallic bonds? |
| A. | C6H12O6 |
| B. | Hg |
| C. | H2O |
| D. | NaCl |
| Answer» C. H2O | |
| 30. |
Which substance is produced when alcohol is added with petrol and used as a fuel?_x005F_x000D_ |
| A. | Only oxygen |
| B. | Only carbon-dioxide |
| C. | Only water |
| D. | Carbon-dioxide and water both |
| Answer» C. Only water | |
| 31. |
Which subatomic particle has a positive charge?_x005F_x000D_ |
| A. | Proton |
| B. | Neutron |
| C. | Electron |
| D. | Ion |
| Answer» B. Neutron | |
| 32. |
Which subatomic particle has a negative charge?_x005F_x000D_ |
| A. | Neutron |
| B. | Proton |
| C. | Ion |
| D. | Electron |
| Answer» E. | |
| 33. |
Which structural formula represents a dipole?_x005F_x000D_ |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 1 |
| Answer» E. | |
| 34. |
Which statement(s) is/are CORRECT regarding Dalton’s Atomic theory?_x005F_x000D_  _x005F_x000D_ I. All matters are made of very tiny particles._x005F_x000D_ II. Atoms of different elements have different masses and chemical properties._x005F_x000D_ III. The relative number of atoms is variable in any compound._x005F_x000D_ |
| A. | Only I and II |
| B. | Only I and III |
| C. | Only II and III |
| D. | All I, II and III |
| Answer» B. Only I and III | |
| 35. |
Which statement is true of all atoms that are anions? |
| A. | The atom has fewer protons than does a neutral atom of the same element. |
| B. | The atom has more protons than electrons. |
| C. | The atom has more neutrons than protons. |
| D. | The atom has more electrons than protons. |
| Answer» E. | |
| 36. |
Which statement is NOT true about polymers? |
| A. | Polymers are large molecules composed of small monomeric units |
| B. | Polymes are macromolecules |
| C. | Polymers are complex molecules composed of random sequences of atoms |
| D. | All the above |
| Answer» D. All the above | |
| 37. |
Which statement describes the acid found in vinegar acetic acid ? |
| A. | It feels slippery |
| B. | It reacts with Mg to produce H2 |
| C. | It tastes bitter |
| D. | It releases OH- in a solution |
| Answer» C. It tastes bitter | |
| 38. |
Which statement describes nuclear binding energy? |
| A. | It is the energy that is required to overcome mass defect. |
| B. | It is the result of converting mass to energy. |
| C. | It is the energy that is required to bind protons and neutrons together in a nucleus. |
| D. | None of the above |
| Answer» B. It is the result of converting mass to energy. | |
| 39. |
Which statement best describes the electronegativity of an element? |
| A. | Electronegativity of an atom is it's ability to produce energy while losing an electron. |
| B. | Electronegativity of an atom is it's ability to attract electrons during bond formation. |
| C. | Electronegativity of an atom is it's ability to lose electrons during cation formation. |
| D. | Electronegativity of an atom is it's ability to share electrons during a covalent bond formation. |
| Answer» C. Electronegativity of an atom is it's ability to lose electrons during cation formation. | |
| 40. |
Which statement best describes electrons? |
| A. | Electrons orbit around the nucleus |
| B. | Electrons are composed of protons and neutrons |
| C. | Electrons reside in the nucleus |
| D. | Electrons have a positive charge |
| Answer» B. Electrons are composed of protons and neutrons | |
| 41. |
Which statement about weak bonds is correct? |
| A. | Covalent bonds are weak bonds |
| B. | They are hard to break |
| C. | Weak bonds are transient and easily reversible. |
| D. | All of the above |
| Answer» D. All of the above | |
| 42. |
Which statement about subatomic particles is not true? |
| A. | Protons and neutrons have the same charge |
| B. | Protons and electrons have the opposite charhes |
| C. | Protons and neutrons have almost the same mass |
| D. | All of the above |
| Answer» B. Protons and electrons have the opposite charhes | |
| 43. |
Which statement about electrons and atomic orbitals is NOT true? |
| A. | An orbital can contain a minimum of two electrons |
| B. | An electron has the same amount of energy in all orbitals |
| C. | An atom’s lowest energy level has only two orbitals |
| D. | All of the above |
| Answer» E. | |
| 44. |
Which species is a conjugate acid of OH- ?_x005F_x000D_ |
| A. | H+ |
| B. | O2- |
| C. | OH |
| D. | H2O |
| Answer» E. | |
| 45. |
Which solution is most concentrated? |
| A. | 6 g of solute in 10 ml of solution |
| B. | 20.5 g of solute in 50 ml of solution |
| C. | 30 g of solute in 120 ml of solution |
| D. | 2.6 g of solute in 2 ml of solution |
| Answer» E. | |
| 46. |
Which solution has the highest pH? |
| A. | 50.0 mL 0.0500 M calcium hydroxide, Ca(OH)2 (aq) |
| B. | 50.0 mL 0.0500 M sodium hydroxide, NaOH (aq) |
| C. | 50.0 mL 0.0500 M nitric acid, HNO3 (aq) |
| D. | 50.0 mL 0.0500 M nitrous acid, HNO2 (aq) |
| Answer» B. 50.0 mL 0.0500 M sodium hydroxide, NaOH (aq) | |
| 47. |
Which sample of matter is a mixture? |
| A. | KBr (S) |
| B. | NaCl (L) |
| C. | K (S) |
| D. | NaCl (Aq) |
| Answer» E. | |
| 48. |
Which scientist established the Law of Octaves? |
| A. | John Newlands |
| B. | Antoine Lavoisier |
| C. | Alfred Nobel |
| D. | Marie Curie |
| Answer» B. Antoine Lavoisier | |
| 49. |
Which sample is a pure substance? |
| A. | Table salt |
| B. | Pure water |
| C. | a test tube of zinc oxide |
| D. | All the above |
| Answer» E. | |
| 50. |
Which reaction occurs spontaneously? |
| A. | Cl2(g) + 2NaF(aq)--> F2(g) + 2NaCl(aq) |
| B. | I2(s) + 2NaF(aq)--> F2(g) + 2NaI(aq) |
| C. | Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq) |
| D. | I2(s) + 2NaBr(aq)--> Br2(l) + 2NaI(aq) |
| Answer» D. I2(s) + 2NaBr(aq)--> Br2(l) + 2NaI(aq) | |