MCQOPTIONS
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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. |
when magnesium reacts with oxygen, the nature of bond formed is |
| A. | covalent |
| B. | ionic |
| C. | None of Above |
| D. | metallic |
| Answer» C. None of Above | |
| 2. |
The higher the temperature the vibration of particles would be |
| A. | vigorous |
| B. | softer |
| C. | may get vigorous or may become softer |
| D. | normal |
| Answer» B. softer | |
| 3. |
The reverse process of melting is |
| A. | solidification |
| B. | boiling |
| C. | sublimation |
| D. | condensation |
| Answer» B. boiling | |
| 4. |
The atomic radius of silicon is |
| A. | 0.112 |
| B. | 0.117 |
| C. | 0.125 |
| D. | 0.104 |
| Answer» C. 0.125 | |
| 5. |
Melting point of tin is |
| A. | 132 °C |
| B. | 32 °C |
| C. | 332 °C |
| D. | 232 °C |
| Answer» E. | |
| 6. |
E standard is |
| A. | electrode |
| B. | standard electrode potential |
| C. | none |
| D. | electrode potential |
| Answer» C. none | |
| 7. |
Na3AlF6 melts ate 1000 C is called as |
| A. | bauxite |
| B. | cryolite |
| C. | sludge |
| D. | brine |
| Answer» C. sludge | |
| 8. |
The bond angles in water are |
| A. | 109.5° |
| B. | 120° |
| C. | 104.5° |
| D. | 87.5° |
| Answer» D. 87.5° | |
| 9. |
A number which is assigned to each atom or ion in a compound which explains its degree of oxidation is called |
| A. | oxidation number |
| B. | oxidation degree |
| C. | both b and c |
| D. | oxidation state |
| Answer» D. oxidation state | |
| 10. |
Electrons needed by Carbon atom to complete its outer most shell are |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» D. 3 | |
| 11. |
The overall reaction in the series of proper steps is termed as |
| A. | reaction |
| B. | mechanism |
| C. | all of them |
| D. | reaction mechanism |
| Answer» E. | |
| 12. |
Nitrogen forms N |
| A. | double covalent bond |
| B. | single covalent bond |
| C. | electrovalent bond |
| D. | triple covalent bond |
| Answer» E. | |
| 13. |
Nickel cadmium cells are |
| A. | low voltage supplier |
| B. | smaller |
| C. | a and c |
| D. | high voltage supplier |
| Answer» D. high voltage supplier | |
| 14. |
The vital part of nitrogen cycle is |
| A. | nitric acid |
| B. | nitrogen oxide |
| C. | nitrogen |
| D. | ammonia |
| Answer» B. nitrogen oxide | |
| 15. |
For first and second order of reactions the graph will be |
| A. | falling |
| B. | straight line |
| C. | curve |
| D. | rising |
| Answer» D. rising | |
| 16. |
For experiments to be carried out in a calorimeter one should have known the amounts of |
| A. | density of liquids |
| B. | volume of liquids |
| C. | All of Above |
| D. | viscosity of liquid |
| Answer» C. All of Above | |
| 17. |
The amount of pressure of liquid increases with |
| A. | base area |
| B. | volume |
| C. | depth |
| D. | mass |
| Answer» D. mass | |
| 18. |
A colorimeter helps to measure in a reaction mixture its |
| A. | reactants |
| B. | progress |
| C. | temperature |
| D. | products |
| Answer» C. temperature | |
| 19. |
A piece of glass with curved surface is termed as |
| A. | blind mirror |
| B. | biconcave mirror |
| C. | mirror |
| D. | lens |
| Answer» E. | |
| 20. |
Ionic compounds only conduct electricity when they are in state |
| A. | liquid |
| B. | solid |
| C. | molten |
| D. | gas |
| Answer» D. gas | |
| 21. |
The method in which small samples of reaction mixture is carried out at various times for chemical analysis is called |
| A. | analyzing |
| B. | sampling |
| C. | all of them |
| D. | continuous |
| Answer» C. all of them | |
| 22. |
When an object is pivoted at a corner, a turning effect about the pivot is caused by |
| A. | Tension |
| B. | Mass |
| C. | Friction |
| D. | Weight |
| Answer» E. | |
| 23. |
Which one of the following is not a transverse wave? |
| A. | Light waves |
| B. | Water waves |
| C. | Radio waves |
| D. | Sound waves |
| Answer» E. | |
| 24. |
Aluminum oxide never react or dissolve in |
| A. | alkali |
| B. | water |
| C. | base |
| D. | acid |
| Answer» C. base | |
| 25. |
Ions which are greater than their original atoms are |
| A. | positively charged |
| B. | negatively charged |
| C. | none |
| D. | neutral |
| Answer» C. none | |
| 26. |
Neither ions nor electrons are free to move in |
| A. | metals |
| B. | liquids |
| C. | All of Above |
| D. | ionic solids |
| Answer» E. | |
| 27. |
In SN2 mechanism 'S' stands for |
| A. | substitution |
| B. | subordinate |
| C. | systemic reaction |
| D. | sub-reaction |
| Answer» B. subordinate | |
| 28. |
Intermolecular forces are |
| A. | very strong |
| B. | very weak |
| C. | strong at room temperature |
| D. | weak at room temperature |
| Answer» C. strong at room temperature | |
| 29. |
CFCs have caused serious environmental hazard by depleting |
| A. | UV rays |
| B. | ozone layer |
| C. | none |
| D. | stratosphere |
| Answer» C. none | |
| 30. |
The molecule which fits into specific site of enzyme is called |
| A. | substrate |
| B. | substance |
| C. | reactant |
| D. | products |
| Answer» B. substance | |
| 31. |
When the medium of electromagnetic waves changes from air to water, their speed |
| A. | remains same |
| B. | increases |
| C. | may increase or decrease |
| D. | decreases |
| Answer» E. | |
| 32. |
The gravitational force on an object is termed as |
| A. | Tension |
| B. | Contact force |
| C. | Resistance |
| D. | Weight |
| Answer» E. | |
| 33. |
A substance which increases the rate of reaction but itself remain chemically unchanged is called a |
| A. | enzyme |
| B. | substrate |
| C. | product |
| D. | reactant |
| Answer» B. substrate | |
| 34. |
The conduction of electricity in metallic bonding is due to presence of |
| A. | lattice |
| B. | protons |
| C. | nucleus |
| D. | delocalized electrons |
| Answer» E. | |
| 35. |
Reduction of nitrobenzene will produce |
| A. | water |
| B. | phenyl amine |
| C. | none |
| D. | both a and b |
| Answer» E. | |
| 36. |
Carbonyl compounds which can be further oxidized easily to form carboxylic group involves |
| A. | ketones |
| B. | aldehydes |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 37. |
The Brownian Motion was discovered by the scientist |
| A. | John Brown |
| B. | Albert Brown |
| C. | Isaac Brown |
| D. | Robert Brown |
| Answer» E. | |
| 38. |
Number of moles of substance can be determined by |
| A. | mass of substance/molecular mass |
| B. | mass of substance/molar mass |
| C. | none |
| D. | atomic weight of substance/Avogadro constant |
| Answer» C. none | |
| 39. |
Enzyme carbonic anhydrase is used in |
| A. | anaerobic respiration |
| B. | aerobic respiration |
| C. | none |
| D. | both |
| Answer» C. none | |
| 40. |
The high response of thermocouple thermometer is due to |
| A. | two wires because the thermal energy would be divided |
| B. | double junctions as they would carry more heat energy |
| C. | metal wires because they are good conductors of electricity |
| D. | heavy mass because voltage would increase the flow of voltage |
| Answer» D. heavy mass because voltage would increase the flow of voltage | |
| 41. |
Choose the wrong, the size of the image formed in a plane mirror |
| A. | the height of the image depends on the object distance |
| B. | could be taller than the mirror |
| C. | the image height depends on the object height |
| D. | the width of the image is the same as of the object |
| Answer» C. the image height depends on the object height | |
| 42. |
John Lister in 19th century used phenol as |
| A. | anesthetic |
| B. | detergent |
| C. | chlorination |
| D. | antiseptic |
| Answer» E. | |
| 43. |
Chemically chlorofluorocarbons are |
| A. | reactive |
| B. | inert |
| C. | instable |
| D. | versatile |
| Answer» C. instable | |
| 44. |
In the prefix form, 0.000001 would be expressed as |
| A. | 0.01 mm |
| B. | 0.1 mm |
| C. | 0.0001 mm |
| D. | 0.001 mm |
| Answer» E. | |
| 45. |
The medium in which the light rays get slower in speed, this medium is termed as |
| A. | Lightingly denser |
| B. | Rarly denser |
| C. | Refractively denser |
| D. | Optically denser |
| Answer» E. | |
| 46. |
Carboxylates are salts produced during reactions of |
| A. | acyl compounds |
| B. | carboxylic acids |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 47. |
The importance of phenyl amine is involved in synthesis of |
| A. | medicines |
| B. | dyes |
| C. | none |
| D. | both a and b |
| Answer» C. none | |
| 48. |
In the process of melting, thermal energy is |
| A. | given out |
| B. | taken in |
| C. | thermal energy isn't needed |
| D. | neither given out nor taken in |
| Answer» C. thermal energy isn't needed | |
| 49. |
Oxygen can complete its outer shell by gaining |
| A. | 2 electron |
| B. | 1 electron |
| C. | 4 electrons |
| D. | 3 electrons |
| Answer» B. 1 electron | |
| 50. |
When high voltage will be passed through a metal, electricity will |
| A. | stop |
| B. | flow |
| C. | none |
| D. | partially flow |
| Answer» C. none | |