MCQOPTIONS
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MCQOPTIONS
This section includes 42 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Solder is an alloy of |
| A. | tin and lead |
| B. | tin and copper |
| C. | tin, copper and zinc |
| D. | tin, lead and zinc |
| Answer» B. tin and copper | |
| 2. |
CNG used in automobiles to check pollution, mainly consists of |
| A. | CH |
| B. | CO |
| C. | N |
| D. | H |
| Answer» B. CO | |
| 3. |
Pyrethrin used in mosquito coil is obtained from |
| A. | a seed plant |
| B. | an insect |
| C. | a bacterium |
| D. | a fungus |
| Answer» B. an insect | |
| 4. |
'Acid rain' is caused due to air - pollution by |
| A. | carbon dioxide |
| B. | carbon monoxide |
| C. | methane |
| D. | nitrous oxide and sulphur dioxide |
| Answer» E. | |
| 5. |
Which one of the following elements is used in the manufacture of safety matches? |
| A. | Graphite |
| B. | Phosphorus |
| C. | Silicon |
| D. | Sodium |
| Answer» C. Silicon | |
| 6. |
Which of the following is not a nitrogenous fertilizer ? |
| A. | Ca(CN) |
| B. | CaCN |
| C. | NH |
| D. | NO |
| E. | Urea |
| Answer» B. CaCN | |
| 7. |
The metal compound commonly found in Sindhoor or Kumkum is based on |
| A. | Tin |
| B. | Lead |
| C. | Copper |
| D. | Zinc |
| Answer» C. Copper | |
| 8. |
In chemical terms, what are alums used for purifying water for drinking purposes ? |
| A. | Hydrated chlorides |
| B. | Double nitrate |
| C. | Double sulphates |
| D. | Nitrates of aluminium |
| Answer» D. Nitrates of aluminium | |
| 9. |
Which one of the following is not present in cement ? |
| A. | Clay |
| B. | Alumina |
| C. | Alum |
| D. | Gypsum |
| Answer» D. Gypsum | |
| 10. |
Milk is a |
| A. | mixture |
| B. | element |
| C. | metal |
| D. | None of these |
| Answer» B. element | |
| 11. |
A detergent is a |
| A. | cleansing agent |
| B. | drug |
| C. | catalyst |
| D. | soap |
| Answer» B. drug | |
| 12. |
'Yellow Cake' an item of smuggling across border is |
| A. | a crude from of heroin |
| B. | a crude from of cocaine |
| C. | uranium oxide |
| D. | unreformed gold |
| Answer» D. unreformed gold | |
| 13. |
Uric acid is present in |
| A. | Soda water |
| B. | Rancid butter |
| C. | Sour milk |
| D. | Urine of mammals |
| Answer» E. | |
| 14. |
Alum purifies muddy water by |
| A. | Absorption |
| B. | Dialysis |
| C. | Emulsification |
| D. | Coagulation |
| Answer» E. | |
| 15. |
Which one among the following is not a mixture? |
| A. | Graphite |
| B. | Glass |
| C. | Brass |
| D. | Steel |
| Answer» B. Glass | |
| 16. |
Which one of the following is responsible for blue baby syndrome? |
| A. | Fluoride |
| B. | Nitrate |
| C. | Arsenic |
| D. | Lead |
| Answer» C. Arsenic | |
| 17. |
Which gas is responsible for the swelling of bread ? |
| A. | Oxygen |
| B. | Carbon monoxide |
| C. | Carbon dixide |
| D. | Ammonia |
| Answer» D. Ammonia | |
| 18. |
A pungent smell often present near the urinals is due to |
| A. | sulphur-di- oxide |
| B. | chlorine |
| C. | ammonia |
| D. | urea |
| Answer» D. urea | |
| 19. |
Vinegar is an aqueous solution of |
| A. | oxalic acid |
| B. | citric acid |
| C. | hydrochloric acid |
| D. | acetic acid |
| Answer» E. | |
| 20. |
Which of the following laser types is used in a laser printer? |
| A. | Dye laser |
| B. | Semiconductor laser |
| C. | Excimer laser |
| D. | Gas laser |
| Answer» E. | |
| 21. |
Indane gas is mixture of |
| A. | butane and hydrogen |
| B. | butane and oxygen |
| C. | butane and propane |
| D. | methane and oxygen |
| Answer» D. methane and oxygen | |
| 22. |
The gas which emits from rice field is |
| A. | ethane |
| B. | methane |
| C. | nitrogen |
| D. | All of the above |
| Answer» C. nitrogen | |
| 23. |
Source of Vitamin C is |
| A. | Nitric acide |
| B. | Ascorbic acid |
| C. | Oxalic acid |
| D. | Maleic acid |
| Answer» C. Oxalic acid | |
| 24. |
Blood cells do not shrink in blood because blood is |
| A. | hypertonic |
| B. | isotonic |
| C. | equimolar |
| D. | hypotonic |
| Answer» C. equimolar | |
| 25. |
What is a mixture of potassium nitrate, powdered charcoal and sulphur called? |
| A. | Glass |
| B. | Cement |
| C. | Paint |
| D. | Gun powder |
| Answer» E. | |
| 26. |
Alum is used as |
| A. | an analgesic |
| B. | a fertilizer |
| C. | a disinfectant |
| D. | a purifier for water |
| Answer» E. | |
| 27. |
In surgery, metal pins are used for joining together broken bones. These metal pins remain uncorroded in the body. What is the material of these pins? |
| A. | Copper |
| B. | Iron |
| C. | Aluminium |
| D. | Titanium |
| Answer» E. | |
| 28. |
Commonly used antiseptic 'Dettol' is a mixture of |
| A. | o-chlorophenoxylenol + terepineol |
| B. | o-cresol + terepineol |
| C. | phenol + terepineol |
| D. | chloroxylenol + terepineol |
| Answer» E. | |
| 29. |
Which of the following is used as a preservative to protect processed food? |
| A. | Sodium sulphate |
| B. | Saccharin |
| C. | BHT |
| D. | Sodium metabisulphite |
| Answer» E. | |
| 30. |
When a nutrient like fertilizer is present in large quantities in a water bodies, plants grow and decay in large numbers because of suffocating of pond that does not leave enough oxygen needed to support life. This type of pollution is called |
| A. | Smog |
| B. | Eutrophication |
| C. | Green house effect |
| D. | None of these |
| Answer» C. Green house effect | |
| 31. |
Cobalt (60) isotope is used in the treatment of |
| A. | heart diseases |
| B. | skin diseases |
| C. | diabetes |
| D. | cancer |
| Answer» E. | |
| 32. |
Which of the following is an antidiabatic drug? |
| A. | Insulin |
| B. | Penicillin |
| C. | Chloroquine |
| D. | Aspirin |
| Answer» B. Penicillin | |
| 33. |
Which one is a sublime substance? |
| A. | Table salt |
| B. | Sugar |
| C. | Iodine |
| D. | Potassium Iodide |
| Answer» D. Potassium Iodide | |
| 34. |
The new strain of bacteria produced by biotechnology in alcohol industry is |
| A. | Escherichia coli |
| B. | Saccharomyces cerevisiae |
| C. | Bacillus subtilis |
| D. | Pseudomonas putida |
| Answer» E. | |
| 35. |
Silicon is used in |
| A. | solar energy devices |
| B. | semiconductors |
| C. | transistors |
| D. | All of these |
| Answer» E. | |
| 36. |
Food cans are coated with tin and not with zinc because |
| A. | zinc is costlier than tin |
| B. | zinc has a higher melting point than tin |
| C. | zinc is more reactive than tin |
| D. | zinc is less reactive than tin |
| Answer» D. zinc is less reactive than tin | |
| 37. |
Which one of the following chemicals helps in fruit ripening? |
| A. | Ethephone |
| B. | Atrazine |
| C. | Isoproturan |
| D. | Malathion |
| Answer» B. Atrazine | |
| 38. |
The process which does not evolve CO2 in air is |
| A. | burning |
| B. | breathing |
| C. | organic delay |
| D. | photosynthesis |
| Answer» E. | |
| 39. |
Match the List-I with List-II and select the correct answer using the codes given below the listsList-I (Green house gas)List-II(Major source)F.Carbondioxide1.Enteric fermentation in cattleG.Methane2.Burning of fossilH.Chloroflro carbons3.Mercury compounds in waste waterJ.Nitrous oxide4.Nylon production 5.Air conditioner and refrigeration unitsCodes :FGHJA.2154B.3421C.3241D.1234 |
| A. | A. |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» B. B. | |
| 40. |
Assertion (A) : Synthetic detergents can lather wen in hard water.Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water. |
| A. | Both A and R is true and R is the correct explanation of A |
| B. | Both A and R is true but R is not a correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» B. Both A and R is true but R is not a correct explanation of A | |
| 41. |
Match the List-I with List-II and select the correct answer using the codes given belowList-I (Vitamin)List-II(Chemical compound)F.Vitamin A1.ThiaminG.Vitamin B12.RetinolH.Vitamin C3.Ascorbic acidJ.Vitamin E4.TocopherolCodes :FGHJA.4132B.2314C.4312D.2134 |
| A. | A. |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» E. | |
| 42. |
Which one of the following statement is correct ?Ozone is found in the earth's atmosphere mostly between |
| A. | 5 and 10 km |
| B. | 10 and 20 km |
| C. | 20 and 50 km |
| D. | 50 and 100 km |
| Answer» D. 50 and 100 km | |