MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in |
| A. | Conduction |
| B. | Convection |
| C. | Radiation |
| D. | Both conduction and convection |
| Answer» C. Radiation | |
| 2. |
Harmful bacteria in drinking water cannot be destroyed by |
| A. | Chlorination |
| B. | boiling |
| C. | adding caustic soda |
| D. | ozonisation |
| Answer» D. ozonisation | |
| 3. |
Haemoglobin has the highest affinity with which of the following? |
| A. | SO2 |
| B. | CO2 |
| C. | CO |
| D. | NO2 |
| Answer» D. NO2 | |
| 4. |
Haematite is an ore/mineral of |
| A. | Zinc |
| B. | Iron |
| C. | Lead |
| D. | Manganese |
| Answer» C. Lead | |
| 5. |
Group displacement law was given by |
| A. | Bacquerel |
| B. | Rutherford |
| C. | Mendeleaf |
| D. | Soddy and Fajan |
| Answer» E. | |
| 6. |
Group 8A of the periodic table contains the_x005F_x000D_ |
| A. | least reactive metals |
| B. | most reactive nonmetals |
| C. | most reactive metals |
| D. | least reactive nonmetals |
| Answer» E. | |
| 7. |
Group 7A of the periodic table contains the |
| A. | most reactive metals |
| B. | least reactive non metals |
| C. | most reactive non metals |
| D. | least reactive metals |
| Answer» D. least reactive metals | |
| 8. |
Glycolysis is the conversion of |
| A. | Glucose to pyruvate |
| B. | Glucose to proteins |
| C. | Pyruvate to glucose |
| D. | All of the above |
| Answer» B. Glucose to proteins | |
| 9. |
Gold and silver are extracted from their respective ores by _______ |
| A. | Smelting |
| B. | Roasting |
| C. | Leaching |
| D. | Hydro metallurgy |
| Answer» E. | |
| 10. |
Glycol is used to manufacture which of the following ? |
| A. | Nylon |
| B. | Artificial silk |
| C. | Terylene |
| D. | Rubber |
| Answer» D. Rubber | |
| 11. |
Glass is a.........mixture of metallic........... |
| A. | homogenous, sulphates |
| B. | homogenous, silicates |
| C. | heterogenous, carbonates |
| D. | heterogenous, nitrates |
| Answer» C. heterogenous, carbonates | |
| 12. |
Glass is also called ________. |
| A. | Supercooled liquid |
| B. | Super liquid |
| C. | Ideal liquid |
| D. | Distilled liquid |
| Answer» B. Super liquid | |
| 13. |
Given in the options are sets of particular characteristics of elements and how they vary across the period and down the group in the following format:_x005F_x000D_  _x005F_x000D_ Characteristic of an element - Across the period - Down the group_x005F_x000D_  _x005F_x000D_ |
| A. | Electropositive Character/metallic character - Increase - Decrease |
| B. | Electropositive Character/metallic character - Increase - Increase |
| C. | Electropositive Character/metallic character - Decrease - Increase |
| D. | Electropositive Character/metallic character - Decrease - Decrease |
| Answer» D. Electropositive Character/metallic character - Decrease - Decrease | |
| 14. |
Give the iupac name for the following compound?_x005F_x000D_ |
| A. | Sec-Butylcyclohexine |
| B. | Isopropylcyclohexane |
| C. | 2-Cyclohexybutane |
| D. | None of the above |
| Answer» C. 2-Cyclohexybutane | |
| 15. |
Give the common name for the following compound_x005F_x000D_ CH32CHÂ CH2Â -Â Br |
| A. | Isobutyl bromide |
| B. | Methyl bromide |
| C. | Propyl bromide |
| D. | Butyl bromide |
| Answer» B. Methyl bromide | |
| 16. |
Give an example of a salt which gives an aqueous solution of pH less than 7. |
| A. | Ammonium chloride |
| B. | Sodium carbonate |
| C. | Sodium bicarbonate |
| D. | Sodium chloride |
| Answer» B. Sodium carbonate | |
| 17. |
Give a possible molecular formula for C3H5ClO? |
| A. | C6H10Cl2O2 |
| B. | C6H10O2 |
| C. | C6H10ClO2 |
| D. | C6H12Cl2O2 |
| Answer» B. C6H10O2 | |
| 18. |
Generally covalently bonded molecules ______._x005F_x000D_ Â _x005F_x000D_ I. have high boiling and melting point as compare to ionically bonded molecules_x005F_x000D_ II. poor conductors of electricity_x005F_x000D_ III. have weak intermolecular force_x005F_x000D_ |
| A. | Only I and II |
| B. | Only I and III |
| C. | Only II and III |
| D. | All I, II and III |
| Answer» D. All I, II and III | |
| 19. |
Gases used in normal welding? |
| A. | Oxygen and Acetylene |
| B. | Acetylene and Nitrogen |
| C. | Oxygen, Hydrogen and Acetylene |
| D. | Oxygen and Hydrogen |
| Answer» B. Acetylene and Nitrogen | |
| 20. |
Gamma rays are |
| A. | high energy electrons |
| B. | low energy electrons |
| C. | high energy electromagnetic |
| D. | high energy positrons waves |
| Answer» D. high energy positrons waves | |
| 21. |
Gammaxene, D.D.T. & Bleaching powder are important compounds of |
| A. | Nitrogen |
| B. | Phosphorus |
| C. | Chlorine |
| D. | Sulphur |
| Answer» D. Sulphur | |
| 22. |
Galvanization a process to prevent rusting involves use of ___ coating to steel or iron. |
| A. | Nickel |
| B. | Magnesium |
| C. | Copper |
| D. | Zinc |
| Answer» E. | |
| 23. |
Formation of curd from milk is chemical reaction. |
| A. | 1 |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 24. |
Formation of cation occurs by |
| A. | gain of electron |
| B. | loss of electron |
| C. | gain of proton |
| D. | loss of proton |
| Answer» C. gain of proton | |
| 25. |
Formation of anions occurs by |
| A. | loss of neutrons |
| B. | gain of protons |
| C. | gain of electrons |
| D. | none |
| Answer» D. none | |
| 26. |
For dilution of a concentrated acid, we should add: |
| A. | water into the diluted acid |
| B. | water into the concentrated acid |
| C. | first water into the acid and then more acid into the water |
| D. | concentrated acid into water |
| Answer» C. first water into the acid and then more acid into the water | |
| 27. |
Fire extinguishers emit which gas? |
| A. | Carbon monoxide |
| B. | Chlorine |
| C. | Carbon dioxide |
| D. | Nitrogen |
| Answer» D. Nitrogen | |
| 28. |
Find the similarity in the following :_x005F_x000D_ Â _x005F_x000D_ Carbon, Silicon, Boron, Arsenic_x005F_x000D_ |
| A. | All of them are gases |
| B. | All of them are non-metals |
| C. | All of them are metals |
| D. | No similarity |
| Answer» C. All of them are metals | |
| 29. |
Find the similarity in the following :_x005F_x000D_ Carbon, Silicon, Boron, Arsenic_x005F_x000D_ |
| A. | All of them are gases |
| B. | All of them are non-metals |
| C. | All of them are metals |
| D. | No similarity |
| Answer» C. All of them are metals | |
| 30. |
Fill in the blank with the most appropriate option._x005F_x000D_ Â _x005F_x000D_ Quicklime reacts with water to form ___._x005F_x000D_ |
| A. | slaked lime |
| B. | limestone |
| C. | chalk powder |
| D. | chloride of lime |
| Answer» B. limestone | |
| 31. |
Fill in the blank with the most appropriate option._x005F_x000D_ Â _x005F_x000D_ Ethanol is denatured to ___._x005F_x000D_ |
| A. | make it unsuitable for drinking |
| B. | make it suitable for drinking |
| C. | increase its stability |
| D. | make it suitable as an antiseptic |
| Answer» B. make it suitable for drinking | |
| 32. |
Fill in the blank with the most appropriate option._x005F_x000D_ Â _x005F_x000D_ An element attains stability when it achieves ________ state._x005F_x000D_ |
| A. | an only-duplet |
| B. | an only-octet |
| C. | a duplet or octet |
| D. | a heptate |
| Answer» D. a heptate | |
| 33. |
Fe2O3 + 2Al ⟶ Al2O3 + 2Fe_x005F_x000D_  _x005F_x000D_ The above reaction is an example of ______._x005F_x000D_ |
| A. | Combination reaction |
| B. | Double displacement reaction |
| C. | Decomposition reaction |
| D. | Displacement reaction |
| Answer» E. | |
| 34. |
Fe has 26 protons in its nucleus. What are the number of electrons in Fe2+ (II) ion? |
| A. | 24 |
| B. | 26 |
| C. | 28 |
| D. | 13 |
| Answer» B. 26 | |
| 35. |
Except Helium, all noble gases have how many electrons in the outermost shell? |
| A. | 4 |
| B. | 8 |
| C. | 6 |
| D. | 10 |
| Answer» C. 6 | |
| 36. |
Factors that may influence enzyme activity?_x005F_x000D_ |
| A. | pH |
| B. | Substrate concentration |
| C. | Temperature |
| D. | All the above |
| Answer» E. | |
| 37. |
Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at –6°C will be: (Kf  for water = 1.86 Kg/mol and molar mass of ethylene glycol = 62 kg/mol) |
| A. | 204.60 g |
| B. | 304.30 g |
| C. | 804.32 g |
| D. | 400.00 g |
| Answer» D. 400.00 g | |
| 38. |
Ethanol is converted into ethoxy ethane, |
| A. | by heating excess of ethanol with conc. H2SO4 at 140°C |
| B. | by treating with conc. H2SO4 at room temperature |
| C. | by treating with conc. H2SO4 at 273 K |
| D. | by heating Ethanol with excess of conc. H2SO4 at 443 K |
| Answer» B. by treating with conc. H2SO4 at room temperature | |
| 39. |
Energy transfer by convection is primarily restricted to |
| A. | fluids |
| B. | solids |
| C. | liquids |
| D. | gases |
| Answer» B. solids | |
| 40. |
Elements that are poor conductors of heat and electricity are |
| A. | Metals |
| B. | Non metals |
| C. | Halogens |
| D. | Noble |
| Answer» C. Halogens | |
| 41. |
Energy produced in nuclear reaction is given by |
| A. | Charle's law |
| B. | Grahm's law |
| C. | Gay - Lussac's law |
| D. | Einstein's law |
| Answer» E. | |
| 42. |
Ethane gas has a slightly ______ taste. |
| A. | sweet |
| B. | bitter |
| C. | sour |
| D. | salty |
| Answer» B. bitter | |
| 43. |
Elements having same atomic numbers but different mass number are called ______._x005F_x000D_ Â _x005F_x000D_ |
| A. | isotones |
| B. | Isotopes |
| C. | isomopes |
| D. | isobar |
| Answer» C. isomopes | |
| 44. |
Elements A, B and C occur as Dobereiners triads. If the atomic mass of A is 7 and that of C is 39, what will be the atomic mass of B? |
| A. | 20 |
| B. | 40 |
| C. | 23 |
| D. | 12 |
| Answer» B. 40 | |
| 45. |
Electrons in the highest energy level of an atom are called ________. |
| A. | valence protons |
| B. | orbital protons |
| C. | valence electrons |
| D. | orbital electrons |
| Answer» D. orbital electrons | |
| 46. |
Electrons can be deflected by which of the following? |
| A. | Only magnetic field |
| B. | Only electric field |
| C. | Both magnetic and electric field |
| D. | No option is correct |
| Answer» D. No option is correct | |
| 47. |
Electronegativity ..... from left to right in a row in the periodic table and electro positivity ...... from left to right in a row in the periodic table._x005F_x000D_ |
| A. | decreases, increases |
| B. | decreases, decreases |
| C. | increases, increases |
| D. | increases, decreases |
| Answer» E. | |
| 48. |
Earth's crust mainly contains ______. |
| A. | bauxite |
| B. | manganese |
| C. | silica |
| D. | iron |
| Answer» D. iron | |
| 49. |
Each consecutive member of the family of hydrocarbons differs from the previous member by the ......... group._x005F_x000D_ |
| A. | Methylene |
| B. | Ethyl |
| C. | Methyl |
| D. | Ethylene |
| Answer» B. Ethyl | |
| 50. |
Dust particles in the air of large industrial cities are removed by |
| A. | Sedimentation |
| B. | Electrophoresis |
| C. | Tyndall effect |
| D. | Brownian movement |
| Answer» C. Tyndall effect | |