MCQOPTIONS
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MCQOPTIONS
This section includes 97 Mcqs, each offering curated multiple-choice questions to sharpen your Graduate Aptitude Test (GATE) knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The aqueous solution of which acids is called Vinegar ? |
| A. | Acetic acid |
| B. | Hydrochloric acid |
| C. | Citric acid |
| D. | Oxalic acid |
| Answer» B. Hydrochloric acid | |
| 2. |
Which have maximum number of isotopes ? |
| A. | Bromine |
| B. | Aluminium |
| C. | Polonium |
| D. | Carbon |
| Answer» D. Carbon | |
| 3. |
What is used to avoid melting of ice ? |
| A. | Gelatine |
| B. | Butane |
| C. | Methane |
| D. | Any acid |
| Answer» B. Butane | |
| 4. |
Oxides of metals are alkaline. |
| A. | TRUE |
| B. | FALSE |
| Answer» B. FALSE | |
| 5. |
What is metallurgy ? |
| A. | process of extracting metal in pure form from its ore. |
| B. | process of creating alloys of metals. |
| C. | process of making metals live long. |
| D. | None of above. |
| Answer» B. process of creating alloys of metals. | |
| 6. |
Acids taste |
| A. | Sour |
| B. | Sweet |
| C. | May be both |
| D. | None of both |
| Answer» B. Sweet | |
| 7. |
Acid rain is due to air pollution by ? |
| A. | Carbon dioxide |
| B. | Carbon monoxide |
| C. | Methane |
| D. | Nitrous oxide and Sulphur dioxide |
| Answer» E. | |
| 8. |
The major component used in preparation of different types of glasses is : |
| A. | Sodium borate |
| B. | Sodium silicate |
| C. | Silica |
| D. | Calcium silicate |
| Answer» D. Calcium silicate | |
| 9. |
How many different oxides are formed by nitrogen ? |
| A. | two |
| B. | three |
| C. | four |
| D. | five |
| Answer» B. three | |
| 10. |
The single acid which dissolves gold is ? |
| A. | Aqua regia |
| B. | Hydrochloric acid |
| C. | Nitric acid |
| D. | Selenic acid |
| Answer» B. Hydrochloric acid | |
| 11. |
Which gas is filled in refrigerators ? |
| A. | Chlorofluorocarbon |
| B. | Acetylene |
| C. | Methane |
| D. | Butane |
| Answer» B. Acetylene | |
| 12. |
Contact lenses are made from ? |
| A. | Polyvinyl chloride |
| B. | Teflon |
| C. | Polystyrene |
| D. | Lucite |
| Answer» B. Teflon | |
| 13. |
Brass is an alloy of ? |
| A. | Copper and Tin |
| B. | Copper and Zinc |
| C. | Copper and Aluminium |
| D. | Iron and Copper |
| Answer» C. Copper and Aluminium | |
| 14. |
What is extracted from Bauxite ? |
| A. | Mica |
| B. | Aluminium |
| C. | Copper |
| D. | Tin |
| Answer» C. Copper | |
| 15. |
Why is phosphorus kept under water ? |
| A. | to make it wet |
| B. | to make it durable |
| C. | water forms a protective coating on it |
| D. | to save it from catching fire when exposed to dry air |
| Answer» E. | |
| 16. |
What is the chemical name of table salt ? |
| A. | Sodium nitrate |
| B. | Ammonium chloride |
| C. | Sodium chloride |
| D. | Calcium chloride |
| Answer» D. Calcium chloride | |
| 17. |
Which of the following elements behave chemically both as a metal and a non metal? |
| A. | Boron |
| B. | Carbon |
| C. | Argon |
| D. | Mercury |
| Answer» B. Carbon | |
| 18. |
Which of the following gases is the most toxic? |
| A. | Carbon dioxide |
| B. | Sulphur dioxide |
| C. | Carbon monoxide |
| D. | Acetic acid |
| Answer» D. Acetic acid | |
| 19. |
The substance that contains the maximum amount of nitrogen is ? |
| A. | Ammonium Sulphate |
| B. | Urea |
| C. | Ammonium Nitrate |
| D. | Ammonium Chloride |
| Answer» C. Ammonium Nitrate | |
| 20. |
The cyclotron is used to |
| A. | accelerating particles |
| B. | separating elements |
| C. | purifying metals |
| D. | making alloys |
| Answer» B. separating elements | |
| 21. |
The ejection of electrons when a metal surface is irradiated is known as |
| A. | Black body radiation |
| B. | Photoelectric effect |
| C. | Zeeman effect |
| D. | Atomic spectrum |
| Answer» C. Zeeman effect | |
| 22. |
Sugars are converted in the liver into |
| A. | Glycogen |
| B. | Vitamin |
| C. | Monosaccharide |
| D. | None of above |
| Answer» B. Vitamin | |
| 23. |
The acid generally stored in batteries is |
| A. | Nitric Acid |
| B. | Hydrochloric Acid |
| C. | Sulphuric Acid |
| D. | Acetic Acid |
| Answer» D. Acetic Acid | |
| 24. |
What is laughing gas ? |
| A. | nitrous oxide |
| B. | nitric oxide |
| C. | nitrogen oxide |
| D. | nitrogen peroxide |
| Answer» B. nitric oxide | |
| 25. |
Permanent hardness of water is due to the presence of ? |
| A. | Magnesium bicarbonate |
| B. | Calcium bicarbonate |
| C. | Sodium bicarbonate |
| D. | Calcium sulphate |
| Answer» E. | |
| 26. |
Petroleum is found in ? |
| A. | Marshy land |
| B. | Metamorphic rocks |
| C. | Igneous rock |
| D. | Sedimentary rocks |
| Answer» E. | |
| 27. |
Ozone is : |
| A. | Non-magnetic |
| B. | Paramagnetic |
| C. | Ferromagnetic |
| D. | Diamagnetic |
| Answer» E. | |
| 28. |
Elements that show the properties of both metals and non metals are called ? |
| A. | metalloids |
| B. | allotropes |
| C. | alloys |
| D. | colloids |
| Answer» B. allotropes | |
| 29. |
Enzymes are |
| A. | Fatty acids |
| B. | Carbohydrates |
| C. | Nucleic acids |
| D. | Proteins |
| Answer» E. | |
| 30. |
Faraday's Law is associated with |
| A. | Reaction of gases |
| B. | Pressure of gases |
| C. | Electrolysis |
| D. | Temperature and pressure |
| Answer» D. Temperature and pressure | |
| 31. |
Atomic number of an element gives |
| A. | the number of nucleons in its atom |
| B. | the number of electrons in its atom |
| C. | the weight of the atom of the element |
| D. | the total number of elementary particles in its atom |
| Answer» C. the weight of the atom of the element | |
| 32. |
What is hottest part of the gas flame is called ? |
| A. | blue zone |
| B. | luminous zone |
| C. | dark zone |
| D. | non-luminous zone |
| Answer» E. | |
| 33. |
What is the hardest form of carbon ? |
| A. | coke |
| B. | graphite |
| C. | charcoal |
| D. | diamond |
| Answer» E. | |
| 34. |
All noble gases are ? |
| A. | colourless |
| B. | colourless |
| C. | colourless and odourless |
| D. | colourless and but have odour |
| Answer» D. colourless and but have odour | |
| 35. |
Alloys made with mercury as one metal are called ? |
| A. | mixtures |
| B. | emulsions |
| C. | solders |
| D. | amalgams |
| Answer» E. | |
| 36. |
Which element found in all organic compounds ? |
| A. | carbon |
| B. | nitrogen |
| C. | calcium |
| D. | none of them |
| Answer» B. nitrogen | |
| 37. |
The main chemical constituent of clay is ? |
| A. | aluminium silicate |
| B. | zeolites |
| C. | aluminium borosilicate |
| D. | silicon oxide |
| Answer» B. zeolites | |
| 38. |
The high reactivity of fluorine is due to ? |
| A. | small size of fluorine atom |
| B. | its high electro negativity |
| C. | availability of d-orbitals |
| D. | strong F - F bond |
| Answer» C. availability of d-orbitals | |
| 39. |
A catalyst is a substance which |
| A. | increases the activation energy |
| B. | increases the rate of reaction and increases the equilibrium concentration of products |
| C. | changes the equilibrium of a reaction so that the concentration of the product increases |
| D. | hastens the attainment of equilibrium |
| Answer» E. | |
| 40. |
Chemical used in photography is |
| A. | sodium sulphate |
| B. | sodium sulphite |
| C. | sodium thiosulphate |
| D. | sodium oxalate |
| Answer» D. sodium oxalate | |
| 41. |
Air is a |
| A. | compound |
| B. | colloid |
| C. | element |
| D. | mixture |
| Answer» E. | |
| 42. |
The gas used for artificial ripening of green fruit is ? |
| A. | ethane |
| B. | ethylene |
| C. | carbon dioxide |
| D. | acetylene |
| Answer» C. carbon dioxide | |
| 43. |
Which one is an organic Acid ? |
| A. | Sulphuric |
| B. | Citric |
| C. | Nitric |
| D. | Phosphoric |
| Answer» C. Nitric | |
| 44. |
The Chemical Symbol of Sodium is |
| A. | So |
| B. | Sd |
| C. | Na |
| D. | Nu |
| Answer» D. Nu | |
| 45. |
The most electropositive elements among the following is : |
| A. | Cs |
| B. | Ca |
| C. | Na |
| D. | Br |
| Answer» B. Ca | |
| 46. |
Which gas is used to manufacture vanaspati from vegetable oil is |
| A. | carbon dioxide |
| B. | nitrogen |
| C. | oxygen |
| D. | hydrogen |
| Answer» E. | |
| 47. |
Due to rusting the weight of iron |
| A. | Decreases |
| B. | Increases |
| C. | Remains the same |
| D. | Uncertain |
| Answer» C. Remains the same | |
| 48. |
Conduction band electrons have more mobility than holes because they are |
| A. | experience collision more frequently |
| B. | experience collision less frequently |
| C. | have negative charge |
| D. | need less energy to move them |
| Answer» C. have negative charge | |
| 49. |
Mass number of a nucleus is : |
| A. | the sum of the number of protons and neutrons present in the nucleus |
| B. | always more than the atomic weight |
| C. | always less than its atomic number |
| D. | None of above |
| Answer» B. always more than the atomic weight | |
| 50. |
The material which can be deformed permanently by heat and pressure is called a |
| A. | thermoset |
| B. | thermoplastic |
| C. | chemical compound |
| D. | polymer |
| Answer» B. thermoplastic | |