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.
| 1801. |
During which process a substance mixes with oxygen or gives off hydrogen? |
| A. | reduction |
| B. | Revision |
| C. | oxidation |
| D. | All of the above |
| Answer» D. All of the above | |
| 1802. |
in covariance. . . |
| A. | Transfer of electrons takes place. |
| B. | There is an equal sharing of electrons. |
| C. | There is neither transfer nor sharing of electrons. |
| D. | Electrons are lost. |
| Answer» C. There is neither transfer nor sharing of electrons. | |
| 1803. |
What is the percentage of oxygen in the air? |
| A. | 1 |
| B. | 20 |
| C. | 60 |
| D. | 80 |
| Answer» C. 60 | |
| 1804. |
Cation is created when . . . . |
| A. | atom receives electrons |
| B. | atom loses electrons |
| C. | Atomic gets positive charge from outside |
| D. | the proton is released from the atom |
| Answer» C. Atomic gets positive charge from outside | |
| 1805. |
What are the examples of different types of mixtures? |
| A. | Milk |
| B. | sand |
| C. | gunpowder |
| D. | All of the above |
| Answer» E. | |
| 1806. |
Methane is in the molecule? |
| A. | Bi-conjunctive bond |
| B. | trivalent bonding |
| C. | Single covalent bond |
| D. | none of these |
| Answer» D. none of these | |
| 1807. |
What is a molecule with a linear structure? |
| A. | CO₂ |
| B. | NO₂ |
| C. | SO₂ |
| D. | SiO₂ |
| Answer» B. NO₂ | |
| 1808. |
What is the reason for the high boiling point of water? |
| A. | its higher specific heat |
| B. | Its greater dielectric constant |
| C. | low dissociation of water molecules |
| D. | Hydrogen bonding in water molecules |
| Answer» E. | |
| 1809. |
What is in sodium chloride? |
| A. | covalent bond |
| B. | sub-covalent bond |
| C. | electrovalent bond |
| D. | none of these |
| Answer» D. none of these | |
| 1810. |
When two atoms of the same element combine with each other, what will be the nature of the bond between them? |
| A. | ionic |
| B. | cooperater |
| C. | polar covalent |
| D. | nonpolar covalent |
| Answer» E. | |
| 1811. |
Liquefied sodium chloride can conduct electric current because it is present in? |
| A. | free electrons |
| B. | free ions |
| C. | free molecules |
| D. | atoms of sodium and chlorine |
| Answer» C. free molecules | |
| 1812. |
ChemicallyMilk of Magnesiais |
| A. | MgO |
| B. | MgH₂ |
| C. | Mg ( OH ) ₂ |
| D. | MgOH |
| Answer» D. MgOH | |
| 1813. |
Electronegativity bond is formed? |
| A. | between the positive ions |
| B. | between negative ions |
| C. | between oppositely possessed ions |
| D. | none of these |
| Answer» D. none of these | |
| 1814. |
Chromium oxide is used as an ingredient in paints to obtain |
| A. | green colour |
| B. | blue color |
| C. | The colour red |
| D. | purple colour |
| Answer» B. blue color | |
| 1815. |
Which gases udbhoot in the ratio 1:3 during the explosion of gunpowder? |
| A. | Oxygen : Nitrogen |
| B. | Nitrogen : Oxygen |
| C. | Nitrogen: Carbon Dioxide |
| D. | carbon dioxide : nitrogen |
| Answer» D. carbon dioxide : nitrogen | |
| 1816. |
The bond found in NH₄Cl is? |
| A. | cooperater |
| B. | electrical connector |
| C. | sub covalent |
| D. | all of which |
| Answer» E. | |
| 1817. |
What are the most important raw materials used in the manufacture of cement? |
| A. | Potassium, Nitrate, Charcoal and Sulfur |
| B. | Limestone, clay and gypsum |
| C. | transition metal oxide, sodium hydroxide or potassium hydroxide |
| D. | Limestone, sodium carbonate and silica |
| Answer» C. transition metal oxide, sodium hydroxide or potassium hydroxide | |
| 1818. |
What is the principle of purification by soap? |
| A. | surface tension |
| B. | flotation |
| C. | viscosity |
| D. | elasticity |
| Answer» B. flotation | |
| 1819. |
Presence of sulfur in gunpowder. . . |
| A. | burning lowers the temperature |
| B. | raises the final temperature |
| C. | Increases explosiveness of gunpowder |
| D. | makes that powder smokeless |
| Answer» B. raises the final temperature | |
| 1820. |
How many types of chemical elements are found on earth? |
| A. | 300 |
| B. | 250 |
| C. | 200 |
| D. | 100 |
| Answer» E. | |
| 1821. |
What is a polymer of natural rubber? |
| A. | ethylene |
| B. | isoprene |
| C. | acetylene |
| D. | hexane |
| Answer» C. acetylene | |
| 1822. |
Which chemical is used to preserve food grains? |
| A. | Honey (Borax) |
| B. | sodium benzoate |
| C. | potassium permanganate |
| D. | none of these |
| Answer» C. potassium permanganate | |
| 1823. |
Must be in fuse wire? |
| A. | low resistance, high melting point |
| B. | low resistance, low melting point |
| C. | high resistance, low melting point |
| D. | high resistance, high melting point |
| Answer» D. high resistance, high melting point | |
| 1824. |
Plants get energy from which of the following? |
| A. | electrical energy |
| B. | thermal energy |
| C. | chemical energy |
| D. | living energy |
| Answer» D. living energy | |
| 1825. |
Which of the following is formed as an active intermediate in Hoffmann bromide reaction? |
| A. | species with positively charged carbon atom |
| B. | Species containing negatively charged carbon atoms |
| C. | Neutral Species |
| D. | Species containing electron positive nitrogen atom |
| Answer» D. Species containing electron positive nitrogen atom | |
| 1826. |
Sulfur is mainly used in the manufacture of |
| A. | H₂SO₄ |
| B. | H₂S |
| C. | SO₄ |
| D. | fungicide |
| Answer» B. H₂S | |
| 1827. |
Which of the following is dry ice? |
| A. | calcium hydroxide |
| B. | solid carbon dioxide |
| C. | sodium hydroxide |
| D. | none of these |
| Answer» C. sodium hydroxide | |
| 1828. |
Which of the following polymers is used to make bulletproof material? |
| A. | polyvinyl chloride |
| B. | polyamide |
| C. | polyethylene |
| D. | polycarbonates |
| Answer» E. | |
| 1829. |
Which gas is produced from plastic? |
| A. | Polynitrogen |
| B. | polyhydrogen |
| C. | Polychlorine |
| D. | polyethylene |
| Answer» E. | |
| 1830. |
Which of the following is chromyl chloride? |
| A. | CrO₂Cl₂ |
| B. | Cr₂OCl₂ |
| C. | CrCl₃ |
| D. | CrOCl₂ |
| Answer» B. Cr₂OCl₂ | |
| 1831. |
What will be the concentration of H⁺ when 4.9 g of H₂SO₄ is dissolved in 500 ml of water? |
| A. | 0 . 2 N |
| B. | 0 . 5 N |
| C. | 1 . 0 N |
| D. | 2 . 0 N |
| Answer» B. 0 . 5 N | |
| 1832. |
What are the types of organic compounds? |
| A. | Covalent compound |
| B. | ionic compound |
| C. | coordinating compound |
| D. | interstitial compound |
| Answer» B. ionic compound | |
| 1833. |
Plaster of Paris (Plaster of Paris) is made of? |
| A. | bauxite |
| B. | gypsum |
| C. | Lime |
| D. | none of these |
| Answer» C. Lime | |
| 1834. |
What is true about bio-patents in India? |
| A. | In 2001, India signed the Budapest Treaty. |
| B. | Prior to 2002, patents were not allowed on living things and organic things. |
| C. | The law was amended in 2002 to grant patents in the field of biotechnology. |
| D. | All of the above |
| Answer» E. | |
| 1835. |
4 grams of NaOH is dissolved in 500 grams of water. The concentration of the solution will be |
| A. | 2M |
| B. | 0 . 2N |
| C. | 0 . 2M |
| D. | 8 grams liter |
| Answer» D. 8 grams liter | |
| 1836. |
What is an example of D उदाहरण ion? |
| A. | Ni²⁺ |
| B. | Cu²⁺ |
| C. | CO²⁺ |
| D. | CO³⁺ |
| Answer» B. Cu²⁺ | |
| 1837. |
Which of the following is not a molecular property? |
| A. | boiling point elevation |
| B. | relative depression of vapor pressure |
| C. | freezing point depression |
| D. | boiling point |
| Answer» E. | |
| 1838. |
The metal of which the fuse wire used for the safe supply of the house is made of? |
| A. | melting point is lower |
| B. | melting point is high |
| C. | resistance is higher |
| D. | resistance is low |
| Answer» B. melting point is high | |
| 1839. |
Exceptional secondary growth is found in? |
| A. | in dracina |
| B. | In Triticum |
| C. | in helianthus |
| D. | In Kukurbita |
| Answer» B. In Triticum | |
| 1840. |
Which of the following presents a chemical change? |
| A. | heat of mercury oxide |
| B. | neutralization of iodine |
| C. | evaporation of alcohol |
| D. | heat of platinum wire |
| Answer» B. neutralization of iodine | |
| 1841. |
18Ar⁴⁰, 19K⁴⁰ and 20Ca are? |
| A. | isotopes |
| B. | isocratic |
| C. | Samneutronic |
| D. | even electronic |
| Answer» C. Samneutronic | |
| 1842. |
Liver Fuyak resides in bile duct? |
| A. | of horse |
| B. | cow's |
| C. | of man |
| D. | of sheep |
| Answer» E. | |
| 1843. |
The atmosphere is made up of a mixture of several types of gases. What is found mainly in the atmosphere near the Earth? |
| A. | nitrogen and oxygen |
| B. | nitrogen and carbon dioxide |
| C. | ethane and oxygen |
| D. | oxygen and carbon dioxide |
| Answer» B. nitrogen and carbon dioxide | |
| 1844. |
There are equineutronics - in which . . . |
| A. | Atomic number same and atomic weight different |
| B. | Atomic number different and atomic weight same |
| C. | Atomic number and atomic weight are both different |
| D. | Atomic number and atomic mass different but same number of neutrons |
| Answer» E. | |
| 1845. |
What is the unit of specific conductivity? |
| A. | ohm cm mol |
| B. | cm |
| C. | Om cm equivalent |
| D. | Ohm¹ cm |
| Answer» E. | |
| 1846. |
Which radioisotope is used to control blood cancer (leukemia)? |
| A. | Phosphorus - 32 |
| B. | cobalt - 60 |
| C. | Iodine - 131 |
| D. | sodium - 24 |
| Answer» C. Iodine - 131 | |
| 1847. |
Which of the following is Arrhenius' equation? |
| A. | K = - Ae - Ea / RT |
| B. | K = Ae - Ea / RT |
| C. | K = e - Ea / RT |
| D. | K=A - Ea / RT |
| Answer» C. K = e - Ea / RT | |
| 1848. |
Is brass an alloy? |
| A. | copper and iron |
| B. | zinc and iron |
| C. | copper and zinc |
| D. | iron and nickel |
| Answer» D. iron and nickel | |
| 1849. |
White kit is an important fungal disease of? |
| A. | of wheat |
| B. | of mustard |
| C. | of rice |
| D. | of millet |
| Answer» C. of rice | |
| 1850. |
Cobalt-60 is commonly used in radiation therapy for diseases such as cancer because it emits? |
| A. | alpha rays |
| B. | beta rays |
| C. | gamma rays |
| D. | all these |
| Answer» D. all these | |