MCQOPTIONS
Saved Bookmarks
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.
| 601. |
Which metal floats when put in water? |
| A. | calcium |
| B. | Nickel |
| C. | magnesium |
| D. | potassium |
| Answer» B. Nickel | |
| 602. |
Melting and boiling points of ionic compounds |
| A. | consists of the following |
| B. | are high |
| C. | are normal |
| D. | all statements are true |
| Answer» C. are normal | |
| 603. |
Which metal reacts with water? |
| A. | Gold |
| B. | potassium |
| C. | silver |
| D. | lead |
| Answer» C. silver | |
| 604. |
Is it an ore of zinc? |
| A. | zinc blade |
| B. | bauxite |
| C. | Sodium chloride |
| D. | Sinawar |
| Answer» B. bauxite | |
| 605. |
Which gas is deposited at the anode when alumina is electrolysed? |
| A. | hydrogen gas |
| B. | nitrogen gas |
| C. | carbon dioxide gas |
| D. | oxygen gas |
| Answer» E. | |
| 606. |
What is an example of a major air pollutant? |
| A. | helium |
| B. | oxygen |
| C. | Carbon dioxide |
| D. | carbon monoxide |
| Answer» E. | |
| 607. |
What is the most commonly used substance as a food preservative? |
| A. | sodium salt of benzoic acid |
| B. | sodium carbonate |
| C. | tartaric acid |
| D. | acetic acid |
| Answer» B. sodium carbonate | |
| 608. |
Which of these non-metals is the brightest? |
| A. | Carbon |
| B. | iodine |
| C. | Sulphur |
| D. | bromine |
| Answer» E. | |
| 609. |
Tobacco smoke is injurious to health because it contains? |
| A. | malathine |
| B. | carbon monoxide |
| C. | nicotine |
| D. | polycyclic aromatic hydrocarbons |
| Answer» D. polycyclic aromatic hydrocarbons | |
| 610. |
The caloric requirement of the body increases in winter as compared to summer because more calories are required? |
| A. | to dissolve more proteins |
| B. | to make more body fat |
| C. | to compensate for falling hair |
| D. | to maintain body temperature |
| Answer» E. | |
| 611. |
Ozone depletion in the atmosphere is mainly caused by? |
| A. | by nitrogen dioxide |
| B. | by sulfur dioxide |
| C. | by chlorofluorocarbons |
| D. | by hydrogen sulfide |
| Answer» D. by hydrogen sulfide | |
| 612. |
What is the main pollutant of cigarette smoke? |
| A. | dioxin and benzene |
| B. | carbon monoxide and dioxin |
| C. | carbon monoxide and nicotine |
| D. | carbon monoxide and benzene |
| Answer» C. carbon monoxide and nicotine | |
| 613. |
A catalyst is a substance which? |
| A. | none of the above |
| B. | increases the rate of reaction |
| C. | Decreases the rate of reaction |
| D. | does not affect the rate of the reaction |
| Answer» C. Decreases the rate of reaction | |
| 614. |
Which of the following gas is used for artificial ripening of fruits? |
| A. | ethylene |
| B. | acetylene |
| C. | ethane |
| D. | methane |
| Answer» B. acetylene | |
| 615. |
What happens in ozone? |
| A. | Oxygen and Nitrogen |
| B. | oxygen only |
| C. | oxygen and carbon |
| D. | hydrogen and carbon |
| Answer» C. oxygen and carbon | |
| 616. |
Which organism monitors air pollution? |
| A. | Lichen |
| B. | bacteria |
| C. | Funzai |
| D. | algae |
| Answer» B. bacteria | |
| 617. |
Is the refrigerant 'freon'? |
| A. | Dichloro methane |
| B. | Calcium Treta Fluoride |
| C. | hydrofluosicic acid |
| D. | Fluorspar and Flaspar |
| Answer» B. Calcium Treta Fluoride | |
| 618. |
Bhopal gas-tragedy was caused by which gas? |
| A. | carbon monoxide |
| B. | phosgene |
| C. | chlorine |
| D. | methyl isocyanate |
| Answer» E. | |
| 619. |
What is a mixture of gunpowder? |
| A. | of TNT and charcoal |
| B. | sulphur, sand and charcoal |
| C. | of niter, sulfur and charcoal |
| D. | of sand and TNT |
| Answer» D. of sand and TNT | |
| 620. |
What is an essential element in the formation and maintenance of cartilage and bones? |
| A. | calcium |
| B. | magnesium |
| C. | silicone |
| D. | zinc |
| Answer» B. magnesium | |
| 621. |
Which of the following is the gas that is mixed with oxygen for breathing by divers in aqualongs? |
| A. | nitrogen |
| B. | hydrogen |
| C. | helium |
| D. | methane |
| Answer» D. methane | |
| 622. |
Freon is used in which of the following form? |
| A. | herbicide |
| B. | insecticide |
| C. | With fungus |
| D. | refrigerant |
| Answer» E. | |
| 623. |
What can happen with gamma rays? |
| A. | sneezing |
| B. | gene mutation |
| C. | fever |
| D. | Burning |
| Answer» C. fever | |
| 624. |
What is the chemical name of aspirin? |
| A. | hydroxysalicylate |
| B. | Methyl salicylate |
| C. | alkyl salicylic acid |
| D. | acetyl salicylic acid |
| Answer» E. | |
| 625. |
The chemical substance often used for artificial rain or cloud seeding is? |
| A. | Sodium chloride |
| B. | silver iodide |
| C. | dry ice |
| D. | all of the above |
| Answer» E. | |
| 626. |
Aspirin is the common name? |
| A. | salicylate |
| B. | of salicylic acid |
| C. | of acetyl salicylate acid |
| D. | of methyl salicylate |
| Answer» D. of methyl salicylate | |
| 627. |
The gas used for artificial ripening of green fruits is? |
| A. | acetylene |
| B. | methane |
| C. | ethane |
| D. | ethylene |
| Answer» E. | |
| 628. |
Which of the following insecticides depletes ozone? |
| A. | Benzene |
| B. | D.D.T. |
| C. | ethylene ozonide |
| D. | methyl bromite |
| Answer» E. | |
| 629. |
Which of the following is a bio rock? |
| A. | Coal |
| B. | marble |
| C. | slate |
| D. | granite |
| Answer» B. marble | |
| 630. |
Which gas in the atmosphere absorbs ultraviolet rays? |
| A. | methane |
| B. | ozone |
| C. | helium |
| D. | nitrogen |
| Answer» C. helium | |
| 631. |
Fog is a powerful substance that irritates the eye present? |
| A. | Carbon dioxide |
| B. | nitric oxide |
| C. | sulphur dioxide |
| D. | peroxy acetyl nitrate |
| Answer» E. | |
| 632. |
What is an example of an aerosol? |
| A. | river water |
| B. | Milk |
| C. | blood |
| D. | smoke |
| Answer» E. | |
| 633. |
Acid rain destroys vegetation, because in |
| A. | is carbon monoxide |
| B. | nitric acid is |
| C. | ozone is |
| D. | contains sulfuric acid |
| Answer» E. | |
| 634. |
Which is the gas which burns by itself but does not help in burning and which gives smell like rotten eggs? |
| A. | hydrogen sulfide |
| B. | Carbon dioxide |
| C. | nitrogen |
| D. | none of these |
| Answer» B. Carbon dioxide | |
| 635. |
Where people working get black lung disease? |
| A. | paint manufacturing industry |
| B. | electroplating industry |
| C. | Coal Mines |
| D. | organic solvent industry |
| Answer» D. organic solvent industry | |
| 636. |
Which of the following is an inert gas mixed with oxygen that is given to patients suffering from obstructed respiration? |
| A. | krypton |
| B. | helium |
| C. | organ |
| D. | radon |
| Answer» C. organ | |
| 637. |
Which one of the following is paramagnetic? |
| A. | iron |
| B. | nitrogen |
| C. | oxygen |
| D. | hydrogen |
| Answer» D. hydrogen | |
| 638. |
Which of the following gas is used to kill bacteria? |
| A. | oxygen |
| B. | chlorine |
| C. | neon |
| D. | hydrogen |
| Answer» C. neon | |
| 639. |
The halogen found in Teflon is? |
| A. | chlorine |
| B. | Iodine |
| C. | bromine |
| D. | florin |
| Answer» E. | |
| 640. |
Used in the manufacture of matches? |
| A. | red phosphorus |
| B. | selenium |
| C. | silicone |
| D. | none of these |
| Answer» C. silicone | |
| 641. |
Which of the following gas darkens the surface of silver? |
| A. | oxygen |
| B. | ozone |
| C. | hydrogen |
| D. | Carbon dioxide |
| Answer» C. hydrogen | |
| 642. |
What is quartz made of? |
| A. | from calcium sulfate |
| B. | from sodium silicate |
| C. | from sodium hydride |
| D. | from calcium silicate |
| Answer» E. | |
| 643. |
What is the most stable form of phosphorus? |
| A. | yellow phosphorus |
| B. | purple phosphorus |
| C. | red phosphorus |
| D. | black phosphorus |
| Answer» D. black phosphorus | |
| 644. |
Which of the following elements is needed in the largest amount by growing plants? |
| A. | calcium |
| B. | Phosphorus |
| C. | nitrogen |
| D. | iron |
| Answer» D. iron | |
| 645. |
Is it easily soluble in water? |
| A. | nitrogen |
| B. | Iodine |
| C. | ammonia |
| D. | Carbon |
| Answer» D. Carbon | |
| 646. |
In what form do plants take up nitrogen? |
| A. | as ammonia |
| B. | as nitrogen |
| C. | free as nitric acid |
| D. | as nitrates |
| Answer» E. | |
| 647. |
Which of the following gas is produced during the formation of photochemical smog? |
| A. | Nitrogen oxide |
| B. | ozone |
| C. | hydrogen |
| D. | methane |
| Answer» B. ozone | |
| 648. |
Which gas is used in the manufacture of vegetable ghee? |
| A. | nitrogen |
| B. | hydrogen |
| C. | Carbon dioxide |
| D. | neon |
| Answer» C. Carbon dioxide | |
| 649. |
How is yellow phosphorus stored? |
| A. | In the air |
| B. | in kerosene |
| C. | in water |
| D. | in petrol |
| Answer» D. in petrol | |
| 650. |
Which gas is used by doctors as anesthesia? |
| A. | nitrogen |
| B. | nitrous oxide |
| C. | Nitrogen oxide |
| D. | none of these |
| Answer» C. Nitrogen oxide | |