MCQOPTIONS
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MCQOPTIONS
This section includes 69 Mcqs, each offering curated multiple-choice questions to sharpen your GK knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A radio-active substance has a half life of six months. Three-fourth of the substance will decay in____. |
| A. | Six months |
| B. | Ten months |
| C. | Twelve months |
| D. | Twenty four months |
| Answer» D. Twenty four months | |
| 2. |
The catalyst is a substance through which the rates of chemical reactions ________. |
| A. | Decreases |
| B. | Changes |
| C. | Increases |
| D. | None of these |
| Answer» D. None of these | |
| 3. |
Neutron was discovered - |
| A. | Chadwick |
| B. | Newton |
| C. | Rutherford |
| D. | Thomson |
| Answer» B. Newton | |
| 4. |
Who was the inventor of positron? |
| A. | Chadwick |
| B. | Anderson |
| C. | Rutherford |
| D. | J.J. Thomson |
| Answer» C. Rutherford | |
| 5. |
Which of the following has low density and low melting point? |
| A. | Na |
| B. | Fe |
| C. | Cu |
| D. | Au |
| Answer» B. Fe | |
| 6. |
.______ is least reactive element belonging to group 17. |
| A. | Bromine |
| B. | Iodine |
| C. | Chlorine |
| D. | Fluorine |
| Answer» C. Chlorine | |
| 7. |
Which of the below allotropes of carbon is in the form of geodesic globe? |
| A. | Fullerene |
| B. | Carbon nanotube |
| C. | Graphite |
| D. | Diamond |
| Answer» B. Carbon nanotube | |
| 8. |
In which of the following classifications are the elements arranged in the order of their increasing atomic number? |
| A. | The Modern Periodic Table |
| B. | Mendeleev's Periodic Table/ |
| C. | Newland's Law of Octaves |
| D. | Dobereiner's Triads |
| Answer» B. Mendeleev's Periodic Table/ | |
| 9. |
Which of the following is not a Green House gas? |
| A. | Nitrous oxide |
| B. | Nitrogen |
| C. | Methane |
| D. | Carbon dioxide |
| Answer» C. Methane | |
| 10. |
The percentage of nitrogen present in ammonium sulphate is: |
| A. | $$ 30.5 % $$ |
| B. | $$ 18 % $$ |
| C. | $$ 21 % $$ |
| D. | $$ 25 % $$ |
| Answer» D. $$ 25 % $$ | |
| 11. |
Which of the following gases turn lime water milky? |
| A. | Carbon Dioxide |
| B. | Oxygen |
| C. | Nitrogen |
| D. | Hydrogen |
| Answer» B. Oxygen | |
| 12. |
Which of the following has the least melting point? |
| A. | Carbon |
| B. | Silver |
| C. | Mercury |
| D. | Gold |
| Answer» D. Gold | |
| 13. |
What is the common name of CaoCl2? |
| A. | Washing Soda |
| B. | Bleaching Powder |
| C. | Baking Powder |
| D. | Baking Soda |
| Answer» C. Baking Powder | |
| 14. |
How are 'anions' formed? |
| A. | Addition of electron |
| B. | Removal of electron |
| C. | Addition of proton |
| D. | Removal of proton |
| Answer» B. Removal of electron | |
| 15. |
The coil in a heater is made of |
| A. | Nichrome |
| B. | Tungsten |
| C. | Copper |
| D. | Iron |
| Answer» B. Tungsten | |
| 16. |
Soda lime is a mixture of |
| A. | NaOH + CaCO3 |
| B. | NaOH + CaO |
| C. | NaOH + HOH |
| D. | None of these |
| Answer» C. NaOH + HOH | |
| 17. |
The atomic mass of an element has the maximum number of electrons in its second orbit |
| A. | 2 |
| B. | 8 |
| C. | 10 |
| D. | 16 |
| Answer» C. 10 | |
| 18. |
Which of the following is not necessary for photosynthesis? |
| A. | Oxygen |
| B. | Chlorophyll |
| C. | Sunlight |
| D. | Carbon dioxide |
| Answer» B. Chlorophyll | |
| 19. |
The melting point of tungsten is____. |
| A. | 3,083 C |
| B. | 3,830 C |
| C. | 3,380 C |
| D. | 3,308 C |
| Answer» D. 3,308 C | |
| 20. |
Who proposed the word 'molecule'? |
| A. | E. Rutherford |
| B. | J.J. Thomson |
| C. | Democritus |
| D. | John Dolton |
| Answer» D. John Dolton | |
| 21. |
Which of the following is not correct about diffusion? |
| A. | The rate of diffusion of gases is higher than that of solid and liquid. |
| B. | Diffusion is possible only when the particles of matter are in constant motion. |
| C. | The rate of diffusion of gases depends on their volume. |
| D. | Particles in diffusion move from high concentration to low concentration. |
| Answer» D. Particles in diffusion move from high concentration to low concentration. | |
| 22. |
The basis of classification of elements in modern periodic table is based on___. |
| A. | Atomic number |
| B. | Atomic mass |
| C. | Atomic volume |
| D. | Atomic density |
| Answer» B. Atomic mass | |
| 23. |
Horizontal columns are called in the Periodic table. |
| A. | Periodic |
| B. | Class |
| C. | Electrical chemical sequence |
| D. | Non-metal |
| Answer» B. Class | |
| 24. |
Alkali metal can |
| A. | Be highly unstable at room temperature |
| B. | vaporize at room temperature |
| C. | easily lose electrons |
| D. | easily gain electrons |
| Answer» D. easily gain electrons | |
| 25. |
What are the main components of Brass Alloy? |
| A. | Copper and Zinc |
| B. | Copper, Zinc and Nickel |
| C. | Copper and Strontium |
| D. | Copper and Nickel |
| Answer» B. Copper, Zinc and Nickel | |
| 26. |
Which gas is mostly present in Venus atmosphere? |
| A. | Hydrogen |
| B. | Carbon Dioxide |
| C. | Helium |
| D. | Nitrogen |
| Answer» C. Helium | |
| 27. |
'Every substance in the world is made up of very fine particles.' Who said this first? |
| A. | Dalton |
| B. | Kanad |
| C. | Rutherford |
| D. | Avogadro |
| Answer» B. Kanad | |
| 28. |
In the nucleus of Helium, |
| A. | four protons |
| B. | four neutrons |
| C. | two neutrons and two protons |
| D. | four protons and two electrons |
| Answer» D. four protons and two electrons | |
| 29. |
What happens in most toothpastes to prevent tooth decay? |
| A. | Bromide |
| B. | Fluoride |
| C. | Iodide |
| D. | Chloride |
| Answer» C. Iodide | |
| 30. |
Which of the following is not a normal salt? |
| A. | $$ {Na_2SO_4}$$ |
| B. | $$ {NaHSO_4}$$ |
| C. | $$ {Na_3PO_4}$$ |
| D. | $$ {CaSO_4}$$ |
| Answer» C. $$ {Na_3PO_4}$$ | |
| 31. |
Solutions having the same osmotic pressure at a given temperature are called_____. |
| A. | hypertonic solution |
| B. | hypotonic solution |
| C. | colloidal solution |
| D. | Isotonic solution |
| Answer» E. | |
| 32. |
Which is not a property of Ionic bond? |
| A. | Gain of electrons |
| B. | Losses of electrons |
| C. | Transfer of electrons |
| D. | Sharing of electrons |
| Answer» E. | |
| 33. |
Which of the following laws suggest a direct relationship between Temperature and Volume of a gas? |
| A. | Avogadro rule |
| B. | Charles rule |
| C. | Boyle rule |
| D. | None of these |
| Answer» C. Boyle rule | |
| 34. |
Emulsion is a dispersion of ____. |
| A. | Gas in Gas |
| B. | Solid in Solid |
| C. | Liquid in Liquid |
| D. | All of these |
| Answer» D. All of these | |
| 35. |
The general name of the elements of 17th group are |
| A. | Metals |
| B. | Noble gases |
| C. | Transition elements |
| D. | Halogens |
| Answer» E. | |
| 36. |
Gold is alloyed with which metal to make it harder? |
| A. | C |
| B. | Sn |
| C. | Cu |
| D. | Ag |
| Answer» D. Ag | |
| 37. |
Isotopes of an element do not have ______. |
| A. | Same number of electrons |
| B. | Same number of protons |
| C. | Same chemical properties |
| D. | Same physical properties |
| Answer» E. | |
| 38. |
The stranger gas is also known as___________. |
| A. | Helium |
| B. | Argon |
| C. | Xenon |
| D. | Neon |
| Answer» D. Neon | |
| 39. |
Which carbohydrate is used in silvering of mirrors? |
| A. | Glucose |
| B. | Starch |
| C. | Fructose |
| D. | Sucrose |
| Answer» B. Starch | |
| 40. |
Which of the following is not nucleon? |
| A. | Proton |
| B. | Neutron |
| C. | Both (A) and (B) |
| D. | Positron |
| Answer» E. | |
| 41. |
The chemical name of limestone is? |
| A. | Sodium Chloride |
| B. | Sodium Sulphide |
| C. | Calcium carbonate |
| D. | Magnesium Chloride |
| Answer» D. Magnesium Chloride | |
| 42. |
In atom, neutron was discovered by |
| A. | Rutherford |
| B. | Newton |
| C. | J.J . Thomson |
| D. | Chadwick |
| Answer» E. | |
| 43. |
The atoms, in which the number of Protons is same but the number of neutrons is different, are known as |
| A. | Isotones |
| B. | Isotopes |
| C. | Isobars |
| D. | Isomers |
| Answer» C. Isobars | |
| 44. |
The atomic nucleus was discovered by |
| A. | Einstein |
| B. | Thompson |
| C. | Rutherford |
| D. | Dalton |
| Answer» D. Dalton | |
| 45. |
The flavor of apple is mainly due to which one of the following? |
| A. | Ethanol |
| B. | Acetone |
| C. | Formalin |
| D. | Benzene |
| Answer» B. Acetone | |
| 46. |
Kerosene oil rises up in the wick of lantern because of |
| A. | The gravitational pull of the wick |
| B. | Surface tension |
| C. | Buoyant force of air |
| D. | Diffusion of the oil through the wick |
| Answer» C. Buoyant force of air | |
| 47. |
Halogens are belonging to: |
| A. | Group17 |
| B. | Group 8 |
| C. | Group 18 |
| D. | Group 7 |
| Answer» B. Group 8 | |
| 48. |
During uniform motion of an object along a straight line, its ___________ remains constant with time. |
| A. | acceleration |
| B. | velocity |
| C. | force |
| D. | deceleration |
| Answer» C. force | |
| 49. |
Burning of Hydrogen produces |
| A. | Soil |
| B. | Water |
| C. | Oxygen |
| D. | Ash |
| Answer» C. Oxygen | |
| 50. |
Baking soda is |
| A. | Sodium Sulphate |
| B. | Sodium Hydroxide |
| C. | Sodium Chloride |
| D. | Sodium Bicarbonate |
| Answer» E. | |