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.
| 651. |
What is the ratio of hydrogen and oxygen in water to volume? |
| A. | 1:8 |
| B. | 2:1 |
| C. | 1:2 |
| D. | 8:1 |
| Answer» C. 1:2 | |
| 652. |
What is the ratio of hydrogen and oxygen in water to weight? |
| A. | 1:8 |
| B. | 8:1 |
| C. | 1:2 |
| D. | none of these |
| Answer» B. 8:1 | |
| 653. |
Artificial diamond is known as? |
| A. | silicon carbide |
| B. | silicon tetrachloride |
| C. | silicon silicate |
| D. | all these |
| Answer» B. silicon tetrachloride | |
| 654. |
What is the main material used in solar cells? |
| A. | silicone |
| B. | Carbon |
| C. | sodium |
| D. | silver |
| Answer» B. Carbon | |
| 655. |
Which of the following metals does not give hydrogen gas on reaction of dilute acid with salt? |
| A. | AI |
| B. | With |
| C. | Fe |
| D. | Zn |
| Answer» C. Fe | |
| 656. |
Which of the following metals is used as the filament of light bulbs? |
| A. | mallydenum |
| B. | iron |
| C. | tungsten |
| D. | none of these |
| Answer» D. none of these | |
| 657. |
Who discovered heavy water? |
| A. | ramje |
| B. | h. ure |
| C. | rontzen |
| D. | none of these |
| Answer» C. rontzen | |
| 658. |
Hydrogen is obtained by burning in air? |
| A. | hydrogen chloride |
| B. | alcohol |
| C. | water |
| D. | ether |
| Answer» D. ether | |
| 659. |
What is the radioactive isotope of hydrogen called? |
| A. | radium |
| B. | deuterium |
| C. | tritium |
| D. | Proteum |
| Answer» D. Proteum | |
| 660. |
Which of the following metals is in liquid state at room temperature? |
| A. | radium |
| B. | silicone |
| C. | sodium |
| D. | gallium |
| Answer» E. | |
| 661. |
White gold is known as? |
| A. | Platium |
| B. | pure savarna |
| C. | silver |
| D. | Petroleum |
| Answer» B. pure savarna | |
| 662. |
What is commonly used in making transistors? |
| A. | Platinum |
| B. | ताबाँ |
| C. | ebonite |
| D. | silicone |
| Answer» E. | |
| 663. |
Which of the following metals is used in aircraft making? |
| A. | palladium |
| B. | lead |
| C. | Titanium |
| D. | none of these |
| Answer» B. lead | |
| 664. |
The presence of which in the smoke emitted from vehicles causes pollution? |
| A. | iron |
| B. | lead |
| C. | sodium |
| D. | potassium |
| Answer» C. sodium | |
| 665. |
What is an essential element for the construction of a nuclear reactor? |
| A. | Nickel |
| B. | Zirconium |
| C. | tungsten |
| D. | cobalt |
| Answer» C. tungsten | |
| 666. |
Which of the following metals is used in accumulator batteries? |
| A. | lead |
| B. | copper |
| C. | aluminum |
| D. | Such as |
| Answer» B. copper | |
| 667. |
From which ore is lead mainly extracted? |
| A. | gallon |
| B. | hematite |
| C. | Cinebar |
| D. | all these |
| Answer» B. hematite | |
| 668. |
How is mercury extracted? |
| A. | from galena |
| B. | from pyrolusite |
| C. | from cinnabar |
| D. | from bauxite |
| Answer» D. from bauxite | |
| 669. |
Which of the following is a liquid at normal temperature? |
| A. | lead |
| B. | tin |
| C. | Nickel |
| D. | Mercury |
| Answer» E. | |
| 670. |
Which of the following is called the future metal? |
| A. | iron |
| B. | steel |
| C. | copper |
| D. | Titanium |
| Answer» E. | |
| 671. |
In which metal vessel is mercury kept? |
| A. | iron |
| B. | Such as |
| C. | silver |
| D. | lead |
| Answer» B. Such as | |
| 672. |
Which of the following is a liquid metal? |
| A. | sodium |
| B. | Mercury |
| C. | lithium |
| D. | beryllium |
| Answer» C. lithium | |
| 673. |
What is added to make gold hard? |
| A. | Nickel |
| B. | iron |
| C. | lead |
| D. | copper |
| Answer» E. | |
| 674. |
Calorimeter is made of? |
| A. | iron |
| B. | aluminum |
| C. | copper |
| D. | silver |
| Answer» D. silver | |
| 675. |
Salty water rusts and cracks the iron pipe, this process is called? |
| A. | oxidation |
| B. | Fragmentation |
| C. | extraction |
| D. | corrosion |
| Answer» E. | |
| 676. |
Which of the following metals does not form amalgam? |
| A. | sodium |
| B. | iron |
| C. | copper |
| D. | potassium |
| Answer» C. copper | |
| 677. |
Is it pure gold? |
| A. | 18 carats |
| B. | 20 carats |
| C. | 21 carats |
| D. | 24 carats |
| Answer» E. | |
| 678. |
On keeping it in air for some time, a layer of green basic carbonate gets deposited on top of a metal, it is a metal? |
| A. | Nickel |
| B. | copper |
| C. | Such as |
| D. | silver |
| Answer» C. Such as | |
| 679. |
With which of the following tape recorder tape is coated? |
| A. | ferromagnetic powder |
| B. | blueprint |
| C. | Mercury |
| D. | none of these |
| Answer» B. blueprint | |
| 680. |
Which of the following metals was first used by humans? |
| A. | iron |
| B. | silver |
| C. | Gold |
| D. | copper |
| Answer» E. | |
| 681. |
What is the outer shell of the egg mainly made of? |
| A. | calcium carbonate |
| B. | calcium bicarbonate |
| C. | calcium chloride |
| D. | calcium phosphate |
| Answer» B. calcium bicarbonate | |
| 682. |
Which of the following metals is present as common component in all of them Brass, Bronze and German Silver? |
| A. | copper |
| B. | Such as |
| C. | tin |
| D. | none of these |
| Answer» B. Such as | |
| 683. |
Lightning conductors are made of? |
| A. | steel |
| B. | copper |
| C. | iron |
| D. | none of these |
| Answer» C. iron | |
| 684. |
Steel is added to give it hardness. |
| A. | amount of manganese |
| B. | amount of carbon |
| C. | amount of silicon |
| D. | Chromium content |
| Answer» E. | |
| 685. |
By applying which substance stops the flow of blood from the cut area? |
| A. | ferric chloride |
| B. | ammonium chloride |
| C. | potassium chloride |
| D. | Sodium chloride |
| Answer» B. ammonium chloride | |
| 686. |
What is the purest form of iron? |
| A. | steel |
| B. | Stainless Steel |
| C. | cast iron |
| D. | wrought iron |
| Answer» E. | |
| 687. |
Which metal is mixed to convert iron into steel? |
| A. | Queues |
| B. | cadmium |
| C. | Nickel |
| D. | manganese |
| Answer» D. manganese | |
| 688. |
Nowadays, yellow lamps are being used in abundance in the street lighting. Which of the following is used in these lamps? |
| A. | sodium |
| B. | nitrogen |
| C. | hydrogen |
| D. | neon |
| Answer» B. nitrogen | |
| 689. |
Elements placed in the zero group are known by what name? |
| A. | halogen |
| B. | soil metal |
| C. | alkali metals |
| D. | inactive ingredients |
| Answer» E. | |
| 690. |
What is the role of a catalyst in a chemical reaction? |
| A. | heat of reaction |
| B. | production of reaction |
| C. | activation energy |
| D. | none of these |
| Answer» D. none of these | |
| 691. |
If a piece of sodium is put in water, it will? |
| A. | will drown |
| B. | will smoke |
| C. | float will burn |
| D. | will float |
| Answer» D. will float | |
| 692. |
Who propounded the law of diffusion of gases? |
| A. | boyle |
| B. | Graham |
| C. | Charles |
| D. | none of these |
| Answer» C. Charles | |
| 693. |
If the pressure of a gas is tripled at constant temperature, its volume will become |
| A. | triple |
| B. | third |
| C. | half |
| D. | Quarter |
| Answer» C. half | |
| 694. |
The necessary condition for the diffusion of gases is that chemical reaction between them? |
| A. | possible |
| B. | not possible |
| C. | be slow |
| D. | be fast |
| Answer» C. be slow | |
| 695. |
What type of fire extinguisher is used for petrol fire? |
| A. | foamy |
| B. | powdered |
| C. | soda acid |
| D. | all these |
| Answer» B. powdered | |
| 696. |
What is the molecular weight of a gas minus its vapor density? |
| A. | double |
| B. | half |
| C. | triple |
| D. | four times |
| Answer» B. half | |
| 697. |
Which one of the following chemical elements has the same oxidation state in all its compounds? |
| A. | Carbon |
| B. | hydrogen |
| C. | fluorine |
| D. | oxygen |
| Answer» D. oxygen | |
| 698. |
Which one of the following was used as a chemical weapon in the First World War? |
| A. | mustard gas |
| B. | hydrogen cyanide |
| C. | carbon monoxide |
| D. | none of these |
| Answer» B. hydrogen cyanide | |
| 699. |
Which of the following metals can be cut with a knife? |
| A. | Magnesium |
| B. | Sulphur |
| C. | sodium |
| D. | Chromium |
| Answer» D. Chromium | |
| 700. |
The vapor density of a gas is 14, what will be its molecular weight? |
| A. | 14 |
| B. | 21 |
| C. | 28 |
| D. | 42 |
| Answer» D. 42 | |