MCQOPTIONS
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MCQOPTIONS
This section includes 6820 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 1551. |
The ozone layer of the atmosphere is depleted as a result of the use of which of the following? |
| A. | green house gas |
| B. | Hydro Fluoro Carbon |
| C. | chloro fluoro carbon |
| D. | liquefied petroleum gas |
| Answer» D. liquefied petroleum gas | |
| 1552. |
Boiling sulfur is obtained when put in cold water? |
| A. | prismatic sulfur |
| B. | milky sulfur |
| C. | monotonous sulfur |
| D. | plastic sulfur |
| Answer» E. | |
| 1553. |
Diamond and graphite are allotropes of |
| A. | silicone |
| B. | Selinian |
| C. | Carbon |
| D. | tin |
| Answer» D. tin | |
| 1554. |
Which of the following elements is not present in German silver? |
| A. | copper |
| B. | Aluminum |
| C. | Such as |
| D. | Nickel |
| Answer» C. Such as | |
| 1555. |
The main method by which the gas CO₂ in the atmosphere is reduced? |
| A. | trigger |
| B. | electrolysis |
| C. | Collection |
| D. | Photosynthesis |
| Answer» E. | |
| 1556. |
The darkening of silver vessels is due to the presence of which gas in the atmosphere? |
| A. | ozone |
| B. | gallon |
| C. | Cinebar |
| D. | rutile |
| Answer» B. gallon | |
| 1557. |
Azolla-Anabina bio-fertilizer is used in which of the following crops? |
| A. | wheat |
| B. | rice |
| C. | Mustard |
| D. | Cotton |
| Answer» C. Mustard | |
| 1558. |
Names of endangered plants are listed? |
| A. | in the blue data book |
| B. | in each data book |
| C. | in the red numbers book |
| D. | in the yellow data book |
| Answer» D. in the yellow data book | |
| 1559. |
Which gas is mixed with oxygen for deep sea breathing by divers? |
| A. | helium |
| B. | nitrogen |
| C. | Jinon |
| D. | ammonia |
| Answer» B. nitrogen | |
| 1560. |
Which gland secretes the milk release hormone oxytocin? |
| A. | pituitary gland |
| B. | thyroid gland |
| C. | parathyroid gland |
| D. | adrenal gland |
| Answer» B. thyroid gland | |
| 1561. |
0.001 The ionization of the solution is 7.0 percent. What is the value of its decomposition constant? |
| A. | 7X10⁻³ |
| B. | 0 . 49X10⁻⁵ |
| C. | 7X10⁻⁵ |
| D. | 7X10⁻⁶ |
| Answer» C. 7X10⁻⁵ | |
| 1562. |
What isPlaster of Parischemically? |
| A. | calcium sulfate |
| B. | calcium carbonate |
| C. | calcium oxide |
| D. | calcium oxalate |
| Answer» B. calcium carbonate | |
| 1563. |
Which of the following forms a cloudy solution when passed through an alkaline solution of C pyrogallol? |
| A. | oxygen |
| B. | nitrogen |
| C. | hydrogen |
| D. | Carbon dioxide |
| Answer» B. nitrogen | |
| 1564. |
What is meant by bioremediation? |
| A. | removal of toxic substances from the environment by organisms |
| B. | biological control of microbes and pests |
| C. | body organ transplant |
| D. | Diagnosis of diseases with the help of micro-organisms |
| Answer» B. biological control of microbes and pests | |
| 1565. |
The isomerism found between [CO ( NH₃ ) 5Br ] SO4 and [CO ( NH₃ ) 5SO₄ ] Br is? |
| A. | bandhani |
| B. | geometric |
| C. | Ion |
| D. | coordinator |
| Answer» D. coordinator | |
| 1566. |
What is the IUPAC name of CH₃CONH (Br)? |
| A. | N - bromoacetiamide |
| B. | N - bromaethenamide |
| C. | I - bromoacetiamide |
| D. | bromopropenamide |
| Answer» C. I - bromoacetiamide | |
| 1567. |
Which of the following is the compound with the highest ionic properties? |
| A. | HI |
| B. | HCL |
| C. | HF |
| D. | HBr |
| Answer» D. HBr | |
| 1568. |
What is a compound with electrovalent bond? |
| A. | O₂ |
| B. | NaBr |
| C. | CCl₄ |
| D. | CHCl₃ |
| Answer» C. CCl₄ | |
| 1569. |
Stainless steel is an alloy of the following? |
| A. | iron and nickel |
| B. | iron, chromium and zinc |
| C. | iron and manganese |
| D. | iron, chromium and nickel |
| Answer» E. | |
| 1570. |
To find the equivalent weight of sulfuric acid, divide its molecular mass by? |
| A. | from one |
| B. | by two |
| C. | from three |
| D. | from four |
| Answer» C. from three | |
| 1571. |
What is the average lifespan of human red blood cells? |
| A. | 30 day |
| B. | 60 days |
| C. | 80 days |
| D. | 120 days |
| Answer» E. | |
| 1572. |
Which of the following is not a name for gamexin? |
| A. | D . D . T. |
| B. | b. NS . C . |
| C. | 666 |
| D. | Linden |
| Answer» B. b. NS . C . | |
| 1573. |
Methyl magnesium bromide is obtained by the action of water on? |
| A. | CH₃OH |
| B. | FACT |
| C. | C₂H₅OH |
| D. | CH₄ |
| Answer» E. | |
| 1574. |
Which of the following gas has the lowest percentage volume (volume) in the atmosphere? |
| A. | organ |
| B. | carbon dioxide |
| C. | nitrogen |
| D. | oxygen |
| Answer» C. nitrogen | |
| 1575. |
How do night vision cameras work? |
| A. | ultrasonic waves |
| B. | infrared radiation |
| C. | UV radiation |
| D. | visible radiation |
| Answer» C. UV radiation | |
| 1576. |
National Science Day is celebrated in India? |
| A. | on May 11 |
| B. | on 14 November |
| C. | On June 5 |
| D. | on February 28 |
| Answer» E. | |
| 1577. |
Which charge carriers conduct in semiconductors? |
| A. | single polar |
| B. | dipole |
| C. | tripolar |
| D. | non-polar |
| Answer» C. tripolar | |
| 1578. |
What causes tetanus? |
| A. | from bacteria |
| B. | from fungus |
| C. | from virus |
| D. | from mycoplasma |
| Answer» B. from fungus | |
| 1579. |
Which of the following medicinal plant comes under the category of endangered lineage in Rajasthan? |
| A. | asparagus |
| B. | Ksenia |
| C. | Commiphora |
| D. | withania |
| Answer» D. withania | |
| 1580. |
Omnipotent blood group is? |
| A. | A |
| B. | B |
| C. | AWAY |
| D. | O |
| Answer» D. O | |
| 1581. |
Mendel gave the laws of genetics by researching on which plant? |
| A. | Peas |
| B. | tomatoes |
| C. | potato |
| D. | onion |
| Answer» B. tomatoes | |
| 1582. |
Which of the following is marble? |
| A. | CaCO₃ |
| B. | CaSO₄ |
| C. | MgCO₃ |
| D. | CaHCO₃ |
| Answer» B. CaSO₄ | |
| 1583. |
Industrial manufacturing is done by Salve process? |
| A. | ammonia |
| B. | chlorine |
| C. | sodium carbonates |
| D. | sulfuric acid |
| Answer» D. sulfuric acid | |
| 1584. |
What are the components of brassware? |
| A. | copper and zinc |
| B. | copper and tin |
| C. | copper and aluminum |
| D. | Copper and Nickel |
| Answer» B. copper and tin | |
| 1585. |
What is the chemical formula of sodium aluminate? |
| A. | NaOH |
| B. | Na₂AlF6 |
| C. | NaAlO₂ |
| D. | none of these |
| Answer» D. none of these | |
| 1586. |
Which of the following is the heaviest object? |
| A. | copper |
| B. | uranium |
| C. | aluminum |
| D. | silver |
| Answer» C. aluminum | |
| 1587. |
Which of the following alloys is used to make magnets? |
| A. | duralumin |
| B. | Stainless Steel |
| C. | Elnico |
| D. | Magnelium |
| Answer» D. Magnelium | |
| 1588. |
Identify the substance not related to atomic power - |
| A. | monazite |
| B. | Thorium |
| C. | beryllium |
| D. | Chromium |
| Answer» E. | |
| 1589. |
Chlorine reacts with slaked lime to form? |
| A. | gypsum |
| B. | plaster of Paris |
| C. | calcium chloride |
| D. | bleaching powder |
| Answer» E. | |
| 1590. |
What is the common name of a chemical compound with the formula NaOH? |
| A. | Caustic soda |
| B. | caustic potash |
| C. | soda ash |
| D. | sodium hydroxide |
| Answer» B. caustic potash | |
| 1591. |
From which mineral is iron obtained? |
| A. | limestone |
| B. | pitch bland |
| C. | monazite sand |
| D. | hematite |
| Answer» E. | |
| 1592. |
Which of the following is not a component of chlorophyll? |
| A. | hydrogen |
| B. | magnesium |
| C. | Carbon |
| D. | calcium |
| Answer» E. | |
| 1593. |
The weight of iron on rusting - |
| A. | grows |
| B. | decreases |
| C. | no change |
| D. | converts |
| Answer» B. decreases | |
| 1594. |
To obtain which of the following metals is bauxite an ore? |
| A. | iron |
| B. | copper |
| C. | silver |
| D. | aluminum |
| Answer» E. | |
| 1595. |
Which coating remains on galvanized iron? |
| A. | aluminum |
| B. | Such as |
| C. | lead |
| D. | silver |
| Answer» C. lead | |
| 1596. |
What is the most abundant element in leafy vegetables? |
| A. | Phosphorus |
| B. | Such as |
| C. | Iron |
| D. | calcium |
| Answer» D. calcium | |
| 1597. |
What is the popular name of calcium sulphate used by doctors, painters, craftsmen etc.? |
| A. | lime of soda |
| B. | potassium permanganate |
| C. | gypsum |
| D. | plaster of Paris |
| Answer» E. | |
| 1598. |
Which metal bromide has a thin layer on photographic film? |
| A. | Platinum |
| B. | magnesium |
| C. | silver |
| D. | Gold |
| Answer» D. Gold | |
| 1599. |
Heinzclaver method is the commercial method of production of |
| A. | caustic soda |
| B. | nitric acid |
| C. | sulfuric acid |
| D. | bleaching powder |
| Answer» E. | |
| 1600. |
With the help of which the process of rusting of iron takes place? |
| A. | water |
| B. | water and oxygen |
| C. | Water and CO₂ |
| D. | water and nitrogen |
| Answer» C. Water and CO₂ | |