MCQOPTIONS
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MCQOPTIONS
This section includes 1300 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 751. |
Which gas is mainly in the mixture of gases coming out of the septic tank? |
| A. | ammonia |
| B. | nitrogen |
| C. | methane |
| D. | hydrogen |
| Answer» D. hydrogen | |
| 752. |
What is commercial vaseline made from? |
| A. | plant glue |
| B. | Petroleum |
| C. | ear wax |
| D. | bitumen |
| Answer» C. ear wax | |
| 753. |
Liquid gold is known as? |
| A. | Platinum |
| B. | Petroleum |
| C. | Aquarius |
| D. | pyrene |
| Answer» C. Aquarius | |
| 754. |
Petrol, which is used as fuel for motor vehicles, is a mixture of |
| A. | of carbohydrates |
| B. | hydrocarbons and alcohols |
| C. | of hydrocarbons |
| D. | none of these |
| Answer» D. none of these | |
| 755. |
What is the shape of a methane molecule? |
| A. | Angular |
| B. | Quadrilateral |
| C. | linear |
| D. | planar |
| Answer» C. linear | |
| 756. |
Which of the following shows isomerism? |
| A. | ethane |
| B. | butane |
| C. | propane |
| D. | methane |
| Answer» C. propane | |
| 757. |
Are there normal butane and isobutane? |
| A. | chain isomer |
| B. | position isomer |
| C. | optical isomer |
| D. | none of these |
| Answer» B. position isomer | |
| 758. |
Used to avoid knocking in car engine |
| A. | ethyl alcohol |
| B. | white petrol |
| C. | lead tetraethyl |
| D. | butane |
| Answer» D. butane | |
| 759. |
Which of the following metals is always found in free faith? |
| A. | neon |
| B. | Gold |
| C. | uranium |
| D. | Mercury |
| Answer» C. uranium | |
| 760. |
Which of the following is an organic compound? |
| A. | water |
| B. | chloroform |
| C. | ammonium chloride |
| D. | Sodium chloride |
| Answer» C. ammonium chloride | |
| 761. |
The process of vaporization from solid camphor is called? |
| A. | Freezing |
| B. | to melt |
| C. | sublimation |
| D. | evaporation |
| Answer» D. evaporation | |
| 762. |
Which of the following metals is the best conductor of electricity? |
| A. | silver |
| B. | Such as |
| C. | Gold |
| D. | copper |
| Answer» B. Such as | |
| 763. |
What is a pungent substance used in dyeing? |
| A. | calcium hydroxide |
| B. | aluminum sulfate |
| C. | zinc phosphate |
| D. | calcium carbonate |
| Answer» D. calcium carbonate | |
| 764. |
From which ore is silver mainly extracted? |
| A. | argentite |
| B. | calamine |
| C. | native silver |
| D. | all these |
| Answer» B. calamine | |
| 765. |
Which chemical is used in making artificial rain? |
| A. | sodium iodide |
| B. | ethyl bromide |
| C. | silver bromide |
| D. | silver iodide |
| Answer» E. | |
| 766. |
Is there a medicine to kill rats? |
| A. | zinc phosphide |
| B. | Sodium chloride |
| C. | zinc carbonate |
| D. | zinc chloride |
| Answer» B. Sodium chloride | |
| 767. |
What is a useful element in photography? |
| A. | silver bromide |
| B. | mercuric chloride |
| C. | calcium carbonate |
| D. | Sodium sulphate |
| Answer» B. mercuric chloride | |
| 768. |
The most flexible and malleable metal is? |
| A. | Gold |
| B. | lead |
| C. | silver |
| D. | aluminum |
| Answer» B. lead | |
| 769. |
To protect wooden objects from insects, coating is done on it? |
| A. | of sodium chloride |
| B. | of zinc chloride |
| C. | of silver bromide |
| D. | ammonium chloride |
| Answer» C. of silver bromide | |
| 770. |
Khaira disease of paddy is caused due to deficiency of which element? |
| A. | calcium |
| B. | magnesium |
| C. | Such as |
| D. | nitrogen |
| Answer» D. nitrogen | |
| 771. |
Is it blue? |
| A. | Copper sulphate |
| B. | Sodium sulphate |
| C. | iron sulphate |
| D. | calcium sulfate |
| Answer» B. Sodium sulphate | |
| 772. |
Which chemical is used to kill algae in water tanks? |
| A. | Copper sulphate |
| B. | zinc blend |
| C. | magnesium sulfate |
| D. | nitric acid |
| Answer» B. zinc blend | |
| 773. |
What is the name of the coating of a thin layer of zinc in an article of steel or iron? |
| A. | Yashad coating |
| B. | electroplating |
| C. | Coating |
| D. | immerse hot |
| Answer» B. electroplating | |
| 774. |
Which metal is mixed in making gold jewellery? |
| A. | Platinum |
| B. | Aluminum |
| C. | copper |
| D. | Mercury |
| Answer» D. Mercury | |
| 775. |
From which ore is zinc metal mainly extracted? |
| A. | Calamine |
| B. | Willemite |
| C. | zinc blend |
| D. | zincite |
| Answer» D. zincite | |
| 776. |
Which of the following fertilizers has the highest nitrogen content? |
| A. | urea |
| B. | ammonium nitrogen |
| C. | potassium nitrate |
| D. | ammonium phosphate |
| Answer» B. ammonium nitrogen | |
| 777. |
Which acid is used in photography? |
| A. | butyrum acid |
| B. | tartaric acid |
| C. | oxalic acid |
| D. | none of these |
| Answer» D. none of these | |
| 778. |
Which disease is caused by the increase in the amount of copper metal in the human body? |
| A. | siderosis |
| B. | wilson disease |
| C. | esophagus |
| D. | anemia |
| Answer» C. esophagus | |
| 779. |
Is a gamexin one? |
| A. | fungicide |
| B. | disinfectant |
| C. | insecticide |
| D. | pesticide |
| Answer» C. insecticide | |
| 780. |
The enemy element of copper is? |
| A. | Carbon |
| B. | hydrogen |
| C. | nitrogen |
| D. | sulfur |
| Answer» E. | |
| 781. |
Which acid is found in grapes? |
| A. | lactic acid |
| B. | tartaric acid |
| C. | citric acid |
| D. | acetic acid |
| Answer» C. citric acid | |
| 782. |
Which acid is found in tamarind? |
| A. | acetam acid |
| B. | butyrum acid |
| C. | oxalum acid |
| D. | tartaric acid |
| Answer» E. | |
| 783. |
Which of the following is used for dry washing? |
| A. | chlorobenzene |
| B. | hydroxybenzene |
| C. | Benzene |
| D. | nitrobenzene |
| Answer» D. nitrobenzene | |
| 784. |
The stones formed in the human kidney are usually made of? |
| A. | of calcium oxalate |
| B. | of magnesium sulfate |
| C. | of sodium acetate |
| D. | of calcium |
| Answer» B. of magnesium sulfate | |
| 785. |
Used to extinguish electric fire? |
| A. | Pyrene fire extinguisher |
| B. | Water fire extinguisher |
| C. | Foam fire extinguisher |
| D. | none of these |
| Answer» B. Water fire extinguisher | |
| 786. |
What is vinegar called in Latin language? |
| A. | acetum |
| B. | formix |
| C. | oxalum |
| D. | butyrum |
| Answer» B. formix | |
| 787. |
Why is lemon sour? |
| A. | lactic acid |
| B. | acetic acid |
| C. | citric acid |
| D. | tartaric acid |
| Answer» D. tartaric acid | |
| 788. |
What kind of reaction is fermentation? |
| A. | Heat absorbent |
| B. | reversible |
| C. | Thermodynamic |
| D. | none of these |
| Answer» D. none of these | |
| 789. |
Which element is commonly found in an organic compound other than hydrogen? |
| A. | sulfur |
| B. | Carbon |
| C. | nitrogen |
| D. | Phosphorus |
| Answer» C. nitrogen | |
| 790. |
What is the positive rod of a dry cell? |
| A. | of graphite |
| B. | of brass |
| C. | of zinc |
| D. | of copper |
| Answer» B. of brass | |
| 791. |
Alcohol is produced as a result of which action? |
| A. | inducement |
| B. | displacement |
| C. | combination |
| D. | fermentation |
| Answer» E. | |
| 792. |
Which was the first organic compound to be synthesized in the laboratory? |
| A. | urea |
| B. | Formal Acid |
| C. | methane |
| D. | acetic acid |
| Answer» B. Formal Acid | |
| 793. |
By which method camphor is purified? |
| A. | sublimation |
| B. | Vacuum distillation |
| C. | Chromatography |
| D. | distillation |
| Answer» B. Vacuum distillation | |
| 794. |
To decolorize raw chichi is used? |
| A. | wood charcoal |
| B. | Animal Charcoal |
| C. | sugar charcoal |
| D. | none of these |
| Answer» D. none of these | |
| 795. |
How many electrons are there in the outermost shell of all inert gases except helium? |
| A. | 5 |
| B. | 8 |
| C. | 10 |
| D. | 18 |
| Answer» C. 10 | |
| 796. |
On which quality does the use of a diamond as a gem depend? |
| A. | refractive index |
| B. | poor conductivity |
| C. | high value |
| D. | extreme hardness |
| Answer» B. poor conductivity | |
| 797. |
The element whose atomic number and atomic mass are both the same? |
| A. | hydrogen |
| B. | chlorine |
| C. | oxygen |
| D. | lithium |
| Answer» B. chlorine | |
| 798. |
What is the molecular weight of heavy water? |
| A. | 18 |
| B. | 20 |
| C. | 22 |
| D. | 25 |
| Answer» C. 22 | |
| 799. |
Which of the following is found in solid state at normal temperature? |
| A. | Iodine |
| B. | chlorine |
| C. | bromine |
| D. | fluorine |
| Answer» B. chlorine | |
| 800. |
Plants prepare their food (glucose) from CO2 and water in the presence of sunlight. Which reaction is this? |
| A. | displacement |
| B. | Dissolution |
| C. | photochemical |
| D. | precipitation |
| Answer» D. precipitation | |