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.
| 1651. |
What is the chemical formula of calomel? |
| A. | HgCl₂ |
| B. | Hg₂Cl₂ |
| C. | HgS |
| D. | HgSO₄ |
| Answer» C. HgS | |
| 1652. |
What is the chemical name of banking soda? |
| A. | sodium carbonate |
| B. | sodium bicarbonate |
| C. | Sodium chloride |
| D. | potassium nitrate |
| Answer» C. Sodium chloride | |
| 1653. |
Hemoglobin is present in? |
| A. | Iron |
| B. | Copper |
| C. | Nickel |
| D. | cobalt |
| Answer» B. Copper | |
| 1654. |
In the method of electroplating a vessel with zinc - |
| A. | The vessel is made negative pole. |
| B. | Pure zinc is made a wealth pole. |
| C. | The pot is made as the negative pole and pure zinc as the positive pole. |
| D. | The vessel is made the positive pole and pure zinc as the negative pole. |
| Answer» D. The vessel is made the positive pole and pure zinc as the negative pole. | |
| 1655. |
Which one of the following pairs of metals has the lightest metal and the heaviest metal respectively? |
| A. | lithium and mercury |
| B. | Lithium and Osmium |
| C. | aluminum and aumium |
| D. | aluminum and mercury |
| Answer» C. aluminum and aumium | |
| 1656. |
What is the chemical name of washing soda? |
| A. | sodium carbonate |
| B. | sodium bicarbonate |
| C. | potassium carbonate |
| D. | potassium bicarbonate |
| Answer» B. sodium bicarbonate | |
| 1657. |
The paint applied to the surface of iron protects the iron from rusting, because it . . . |
| A. | Chemically reacts with iron. |
| B. | prevents carbon dioxide from coming in contact with iron |
| C. | changes the rate of chemical reaction of iron |
| D. | Prevents oxygen and moisture from coming into contact with iron |
| Answer» E. | |
| 1658. |
What is Philosopher's Wool? |
| A. | ZnO |
| B. | ZnCO₃ |
| C. | ZnS |
| D. | ZnSO₄ |
| Answer» B. ZnCO₃ | |
| 1659. |
Which of the following is a soil improver? |
| A. | gypsum |
| B. | ammonium sulfate |
| C. | rock phosphate |
| D. | D . a . P . |
| Answer» B. ammonium sulfate | |
| 1660. |
False gold is known as? |
| A. | SnS₂ |
| B. | FeS₂ |
| C. | FeCl₃ |
| D. | Fe₂O₃ |
| Answer» C. FeCl₃ | |
| 1661. |
The rays of which of the following radioactive elements are used in the treatment of cancer? |
| A. | radium |
| B. | strontium |
| C. | barium |
| D. | cobalt |
| Answer» E. | |
| 1662. |
Is the horn silver? |
| A. | AgCl |
| B. | AgBr |
| C. | AgNo₃ |
| D. | AgI |
| Answer» B. AgBr | |
| 1663. |
What is the substance made in the rusting of iron? |
| A. | ferric oxide |
| B. | calcium chloride |
| C. | Sodium chloride |
| D. | Ferric and Ferrous Oxide |
| Answer» E. | |
| 1664. |
Which of the following elements when mixed with iron forms steel that can resist high temperatures and has high hardness and abrasion resistance? |
| A. | aluminum |
| B. | Chromium |
| C. | Nickel |
| D. | tungsten |
| Answer» C. Nickel | |
| 1665. |
What is the molecular formula of hydrolith? |
| A. | CaO2 |
| B. | CaH2 |
| C. | CaOH |
| D. | MgO2 |
| Answer» C. CaOH | |
| 1666. |
Red lead? |
| A. | PbSO₄ |
| B. | PbO₂ |
| C. | Pb3O₄ |
| D. | PbCO₃ |
| Answer» D. PbCO₃ | |
| 1667. |
What is the chemical formula of tutia? |
| A. | CuS |
| B. | With (OH) ₂ |
| C. | CuCl₂2H₂O |
| D. | CuSO₄ - 5H₂O |
| Answer» E. | |
| 1668. |
What is used as a neutron controller in nuclear reactors? |
| A. | heavy water |
| B. | graphite |
| C. | Cadmium or boron |
| D. | aluminum |
| Answer» D. aluminum | |
| 1669. |
What is the chemical formula of blue tea? |
| A. | Na₂S₂O₃ - 5H₂O |
| B. | Na₂CO₃ - 10H₂O |
| C. | Na₂SO₄ --10H₂O |
| D. | CuSO₄ - 5H₂O |
| Answer» E. | |
| 1670. |
Milk of Magnesia is? |
| A. | magnesium carbonate |
| B. | sodium bicarbonate |
| C. | electrochemical sequence |
| D. | magnesium hydroxide |
| Answer» E. | |
| 1671. |
The ultra soft mineraltalcis mainly? |
| A. | manganese silicate |
| B. | sodium silicate |
| C. | Sodium phosphate |
| D. | magnesium silicate |
| Answer» E. | |
| 1672. |
What was used in the atomic bomb dropped by the United States on Nagasaki? |
| A. | Plutonium |
| B. | uranium |
| C. | Thorium |
| D. | radium |
| Answer» B. uranium | |
| 1673. |
Which metal reacts with hot sodium hydroxide solution to give hydrogen gas? |
| A. | With |
| B. | Fe |
| C. | Ag |
| D. | Zn |
| Answer» E. | |
| 1674. |
What is the chemical indicator of lunar caustics? |
| A. | AgBr |
| B. | AgNO₃ |
| C. | Ag ( NO₃ ) ₃ |
| D. | AgF |
| Answer» C. Ag ( NO₃ ) ₃ | |
| 1675. |
German silver used in making utensils is an alloy? |
| A. | of copper, silver and nickel |
| B. | of copper, zinc and nickel |
| C. | of copper, zinc and aluminum |
| D. | of copper, nickel and aluminum |
| Answer» C. of copper, zinc and aluminum | |
| 1676. |
The wave of highest penetrating power is? |
| A. | infrared wave |
| B. | ultraviolet wave |
| C. | x rays |
| D. | gamma ray |
| Answer» E. | |
| 1677. |
Which scientist discovered the element polonium? |
| A. | F . W. auston |
| B. | Marie Curie |
| C. | Frederick Juliet |
| D. | Irene Curie |
| Answer» C. Frederick Juliet | |
| 1678. |
Lightest metal? |
| A. | magnesium |
| B. | lithium |
| C. | Platinum |
| D. | Dalton |
| Answer» C. Platinum | |
| 1679. |
What is the most abundant element on earth? |
| A. | oxygen |
| B. | silicone |
| C. | aluminum |
| D. | Iron |
| Answer» B. silicone | |
| 1680. |
Which group does the inert element belong to? |
| A. | zero group |
| B. | VIIA |
| C. | VIII |
| D. | HE |
| Answer» B. VIIA | |
| 1681. |
The long form of the periodic table depends on? |
| A. | period |
| B. | Class |
| C. | electrochemical sequence |
| D. | non-metal |
| Answer» B. Class | |
| 1682. |
What is the total number of periods in the modern periodic table? |
| A. | 5 |
| B. | 7 |
| C. | 9 |
| D. | 16 |
| Answer» C. 9 | |
| 1683. |
Who propounded theoctet lawrelated to the classification of elements? |
| A. | the Duma |
| B. | dobrener |
| C. | by newlands |
| D. | Mendeleev |
| Answer» D. Mendeleev | |
| 1684. |
Estrogen is produced by? |
| A. | egg |
| B. | Vesicles |
| C. | corpus luteum |
| D. | Uterus |
| Answer» C. corpus luteum | |
| 1685. |
By which process does the alum gondle purify the water? |
| A. | absorption |
| B. | Absorption |
| C. | coagulation |
| D. | dialysis |
| Answer» D. dialysis | |
| 1686. |
Which of the following is a fundamental property of an element? |
| A. | atomic mass |
| B. | molar mass |
| C. | atomic number |
| D. | atomic density |
| Answer» D. atomic density | |
| 1687. |
Who is the father of the periodic table of elements? |
| A. | johannes vanderwaals |
| B. | johann baer |
| C. | Alfred Nobel |
| D. | Dimitri Mendeleev |
| Answer» E. | |
| 1688. |
Which quality separates a man from all other Vaastu qualities? |
| A. | wish to know |
| B. | olfactory dysfunction |
| C. | opposite thumb |
| D. | chin out |
| Answer» D. chin out | |
| 1689. |
Identify the man made element |
| A. | Carbon |
| B. | Gold |
| C. | californium |
| D. | calcium |
| Answer» D. calcium | |
| 1690. |
The study of scientific description of one's culture is called? |
| A. | ethnology |
| B. | ethnography |
| C. | ethology |
| D. | ethics |
| Answer» B. ethnography | |
| 1691. |
Thalassemia is an example of |
| A. | deletion mutation |
| B. | point mutation |
| C. | silent mutation |
| D. | frame displacement mutation |
| Answer» E. | |
| 1692. |
What is formed by joining two or more identical atoms? |
| A. | molecule |
| B. | Compound |
| C. | Element |
| D. | salt |
| Answer» B. Compound | |
| 1693. |
One molecule of CFC can destroy how many ozone molecules by chain reaction? |
| A. | Only one |
| B. | about one lakh |
| C. | about a million |
| D. | about one crore |
| Answer» C. about a million | |
| 1694. |
Where are coral reefs or fossil belts usually found? |
| A. | in temperate climate zone above 18℃ |
| B. | In the coastal areas between Cancer and Capricorn |
| C. | on both the eastern and western coasts of continents and islands |
| D. | on cold beaches |
| Answer» C. on both the eastern and western coasts of continents and islands | |
| 1695. |
Which of the different types of coal has the highest percentage of carbon? |
| A. | Pete |
| B. | lignite |
| C. | bituminous |
| D. | anthracite |
| Answer» E. | |
| 1696. |
Producer gas is a mixture of? |
| A. | CO + N₂ |
| B. | CO₂ + H₂ |
| C. | CO + H₂ + N₂ |
| D. | COL + SMALL |
| Answer» B. CO₂ + H₂ | |
| 1697. |
What are the prerequisites for a good fuel? |
| A. | its calorific value should be high |
| B. | it should be easily combustible |
| C. | Its ignition temperature should be suitable |
| D. | all of the above |
| Answer» E. | |
| 1698. |
What is the anti-explosive property of a fuel? |
| A. | gold number |
| B. | Natural numbers |
| C. | octane number |
| D. | mac number |
| Answer» D. mac number | |
| 1699. |
Which gas is used in fire fighting? |
| A. | helium |
| B. | CO₂ |
| C. | CO |
| D. | O₂ |
| Answer» C. CO | |
| 1700. |
What is the main component of LPG? |
| A. | methane |
| B. | ethane |
| C. | Pentane |
| D. | butane |
| Answer» E. | |