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.
| 651. |
The maximum fixation of solar energy is done by |
| A. | Bacteria |
| B. | Protozoa |
| C. | Fungi |
| D. | Green plants |
| Answer» E. | |
| 652. |
The maximum number of electrons that can be accommodated in a shell depends on the formula_x005F_x000D_ |
| A. | 1n2 |
| B. | n2 |
| C. | 3n2 |
| D. | 2n2 |
| Answer» E. | |
| 653. |
The mass of one molecule of oxygen is_x005F_x000D_ |
| A. | 2.3 x 10-23 g |
| B. | 3.3 x 10-23 g |
| C. | 4.3 x 10-23 g |
| D. | 5.3 x 10-23 g |
| Answer» E. | |
| 654. |
The mass of proton and mass of ________ is same. |
| A. | Neutron |
| B. | Electron |
| C. | Isoprone |
| D. | Alpha particle |
| Answer» B. Electron | |
| 655. |
The major ingredient of sweetened soft drink is |
| A. | Carbonated water |
| B. | Hydrochloric acid |
| C. | Phosphoric acid |
| D. | Caffeine |
| Answer» B. Hydrochloric acid | |
| 656. |
The mass of a mole of NaCl is the |
| A. | 58.44 gm/mol |
| B. | 57.25 gm/mol |
| C. | 56.31 gm/mol |
| D. | 59.14 gm/mol |
| Answer» B. 57.25 gm/mol | |
| 657. |
The mass number of an isotope of an element is 298. If its nucleus has 196 neutrons, what is its atomic number? |
| A. | 196 |
| B. | 102 |
| C. | 494 |
| D. | 298 |
| Answer» C. 494 | |
| 658. |
The mass number of an isotope of an element is 298. If its nucleus has 189 neutrons, what is its atomic number? |
| A. | 298 |
| B. | 189 |
| C. | 109 |
| D. | 487 |
| Answer» D. 487 | |
| 659. |
The mass number of an isotope of an element is 298. If its nucleus has 188 neutrons, what is its atomic number? |
| A. | 488 |
| B. | 110 |
| C. | 298 |
| D. | 188 |
| Answer» C. 298 | |
| 660. |
The main use of salt in the diet is to_x005F_x000D_ |
| A. | produce in small amounts the hydrochloric acid required for the digestion of food |
| B. | increase the solubility of food particles in water |
| C. | make the taste of food better |
| D. | ease the process of cooking |
| Answer» B. increase the solubility of food particles in water | |
| 661. |
The main element used in the vulcanisation of rubber is |
| A. | nickel |
| B. | copper |
| C. | sulphur |
| D. | graphite |
| Answer» D. graphite | |
| 662. |
The main cause of rancidity in foods is the ____ of fats and oils. |
| A. | hydrolysis |
| B. | clarification |
| C. | reduction |
| D. | oxidation |
| Answer» E. | |
| 663. |
The main mineral constituents of the continental mass are ________ and alumina. |
| A. | iron oxide |
| B. | silica |
| C. | water |
| D. | oxygen |
| Answer» C. water | |
| 664. |
The luster of a metal is due to presence of free electrons. |
| A. | 1 |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 665. |
The least reactive elements of the periodic table are:_x005F_x000D_ |
| A. | Transition elements |
| B. | Inner transition elements |
| C. | Alkali metals |
| D. | Noble gases |
| Answer» E. | |
| 666. |
The law of constant proportions was enunciated by |
| A. | Dalton |
| B. | Berthelot |
| C. | Avogadro |
| D. | Proust |
| Answer» E. | |
| 667. |
The Kinetic energy of gas molecules |
| A. | is unaffected by temperature variations |
| B. | decreases with increase of temperature |
| C. | increases with decrease of temperature |
| D. | increases with increase of temperature |
| Answer» E. | |
| 668. |
The isotopes of chlorine with mass number 35 and 37 exist in the ratio of |
| A. | 0.043055555555556 |
| B. | 0.085416666666667 |
| C. | 0.12569444444444 |
| D. | 0.12777777777778 |
| Answer» D. 0.12777777777778 | |
| 669. |
The hazardous component in most antifreeze is |
| A. | Ethane alcohol |
| B. | Ethylene Glycol |
| C. | Ehtylene |
| D. | Ethene |
| Answer» C. Ehtylene | |
| 670. |
The hardest natural substance is |
| A. | Graphite |
| B. | Diamond |
| C. | Iron |
| D. | Copper |
| Answer» C. Iron | |
| 671. |
The hard Shell of an egg was dissolved in HCL. The egg was then placed in a concentration solution of NaCl. What will happens ______ |
| A. | The egg will shrink |
| B. | The egg will swell |
| C. | The egg will become harder |
| D. | There will be hardly any visible change |
| Answer» B. The egg will swell | |
| 672. |
The fundamental particles present in equal numbers in neutral atoms are |
| A. | protons and electrons |
| B. | neutrons and electrons |
| C. | protons and neutrons |
| D. | protons and positrons |
| Answer» B. neutrons and electrons | |
| 673. |
The gas evolved when sodium carbonate reacts with hydrochloric acid is |
| A. | Hydrogen |
| B. | Chlorine |
| C. | Hydrogen Chloride |
| D. | Carbon dioxide |
| Answer» E. | |
| 674. |
The function of nitrogen in air is |
| A. | to make air a moderate supporter of combustion |
| B. | to maintain the density of air constant |
| C. | to prevent the hydrogen in air from exploding |
| D. | to reduce the poisonous nature of ozone in air |
| Answer» B. to maintain the density of air constant | |
| 675. |
The freezing point of water at 760mm pressure is |
| A. | 0 K |
| B. | 273 K |
| C. | 273 C |
| D. | -273 C |
| Answer» C. 273 C | |
| 676. |
The formula of lithium nitride is:_x005F_x000D_ |
| A. | Li2N |
| B. | LiN |
| C. | Li3N2 |
| D. | Li3N |
| Answer» E. | |
| 677. |
The formula C6H14 represents the hydrocarbon ___._x005F_x000D_ |
| A. | Hexene |
| B. | Heptyne |
| C. | Hexane |
| D. | Hexyne |
| Answer» D. Hexyne | |
| 678. |
The force that a neutron exerts on a proton inside an atom is: |
| A. | Tidal force |
| B. | Gravitational force |
| C. | Electrostatic force |
| D. | Nuclear force |
| Answer» E. | |
| 679. |
The first indication that a stable nucleus can be broken down was afforded by |
| A. | Rutherford |
| B. | Madam Curie |
| C. | Soddy |
| D. | Schmidt |
| Answer» B. Madam Curie | |
| 680. |
The first two steps in the lithification process are |
| A. | Cementation and Proposal |
| B. | Compaction and Ratification |
| C. | Compaction and Cementation |
| D. | Ratification and Cementation |
| Answer» D. Ratification and Cementation | |
| 681. |
The first electron shell which is the nearest to the nucleus never holds more than 'n' electrons, where 'n' is equal to:_x005F_x000D_ Â _x005F_x000D_ |
| A. | 8 |
| B. | 4 |
| C. | 6 |
| D. | 2 |
| Answer» E. | |
| 682. |
The enzyme in whosepresence glucose and fructose are converted into alcohol is |
| A. | Diastase |
| B. | Maltase |
| C. | Invertase |
| D. | Zymase |
| Answer» E. | |
| 683. |
The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10 dm3 at 27°C is to a volume of 100 dm3_x005F_x000D_ |
| A. | 42.3 J/ mole / K |
| B. | 38.3 J/ mole / K |
| C. | 35.8 J/ mole / K |
| D. | 32.3 J/ mole / K |
| Answer» C. 35.8 J/ mole / K | |
| 684. |
The elements known as primary nutrients for plants |
| A. | Nitrogen, Phosphorus and Potassium |
| B. | Nitrogen, Oxygen and Silicon |
| C. | Potassium, Boron and Nitrogen |
| D. | Nitrogen, Phosphorus and Iron |
| Answer» B. Nitrogen, Oxygen and Silicon | |
| 685. |
The element with the highest electron affinity among halogens is |
| A. | F |
| B. | I |
| C. | Cl |
| D. | Br |
| Answer» D. Br | |
| 686. |
The element that has the highest first ionization potential is....... |
| A. | Oxygen |
| B. | Carbon |
| C. | Boron |
| D. | Nitrogen |
| Answer» E. | |
| 687. |
The element present in the fourth period and in the second group is ..........._x005F_x000D_ Â _x005F_x000D_ |
| A. | Calcium |
| B. | Potassium |
| C. | Scandium |
| D. | Magnesium |
| Answer» B. Potassium | |
| 688. |
The element present in all organic molecules is |
| A. | Hydrogen |
| B. | Oxygen |
| C. | Carbon |
| D. | None of the above |
| Answer» D. None of the above | |
| 689. |
The element gold occurs in which period? |
| A. | 11 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» D. 7 | |
| 690. |
The electronic configuration of four elements is given below. Which one among the following will be more electro neeative?_x005F_x000D_ |
| A. | A1(2,8,3) |
| B. | P(2,8,5) |
| C. | C1(2,8,7) |
| D. | S(2,8,6) |
| Answer» D. S(2,8,6) | |
| 691. |
The depletion in Ozone layer is caused by ___________ . |
| A. | Nitrous oxide |
| B. | Carbon dioxide |
| C. | Chlorofluorocarbons |
| D. | Methane |
| Answer» D. Methane | |
| 692. |
The current atomic model would be revised if |
| A. | better microscopes are invented in the future |
| B. | a new element is discovered in the future |
| C. | better microscopes were being used to study its structure |
| D. | new information about an atoms structure is discovered |
| Answer» E. | |
| 693. |
The crop that has the highest photosynthetic activity - |
| A. | Sugarcane |
| B. | Wheat |
| C. | Cotton |
| D. | Rice |
| Answer» B. Wheat | |
| 694. |
The credit for the discovery of transuranic element goes to |
| A. | Hahn |
| B. | Rutherford |
| C. | Seaborg |
| D. | Curie |
| Answer» D. Curie | |
| 695. |
The credit for classifying the elements on the basis of their atomic masses goes to |
| A. | John Dalton |
| B. | John Alexander Reina Newlands |
| C. | Dmitri Mendeleev |
| D. | Johann Wolfgang Dobereiner |
| Answer» D. Johann Wolfgang Dobereiner | |
| 696. |
The conversion of hard water into soft water by boiling or adding calcium hydroxide is called _______. |
| A. | Baker's process |
| B. | Temp's process |
| C. | Clarke's process |
| D. | Lake's process |
| Answer» D. Lake's process | |
| 697. |
The compound used in prickly-Âheat powder to prevent excessive sweating is |
| A. | Boric acid |
| B. | Phosphoric acid |
| C. | Carbonic acid |
| D. | Sulphonic acid |
| Answer» B. Phosphoric acid | |
| 698. |
The compound MgCl2 is named |
| A. | Magnesium Chloride |
| B. | Magnesium Chlorine |
| C. | Magnesium Dichloride |
| D. | Dimagnesium Chloride |
| Answer» B. Magnesium Chlorine | |
| 699. |
The complexity and variety of organic molecules is due to |
| A. | their interaction with water |
| B. | their tremendously large sizes |
| C. | the chemical versatility of carbon atoms |
| D. | the variety of rare elements in organic molecules |
| Answer» D. the variety of rare elements in organic molecules | |
| 700. |
The commonly used coolant in refrigerators is |
| A. | Ammonia |
| B. | Nitrogen |
| C. | Freon |
| D. | Oxygen |
| Answer» D. Oxygen | |