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.
| 1851. |
Which isotope is used to determine the status of a blood clot in the circulatory system? |
| A. | On - 24 |
| B. | CO - 60 |
| C. | As - 74 |
| D. | I - 131 |
| Answer» B. CO - 60 | |
| 1852. |
If the half-life of a first order reaction is 6 minutes, then the rate constant of the reaction will be? |
| A. | 0 . 2233 minutes |
| B. | 0 . 0286 min |
| C. | 0 . 1155 minutes |
| D. | 0 . 056 minutes |
| Answer» D. 0 . 056 minutes | |
| 1853. |
The isotope of an atomic nucleus is the nucleus in which . . . |
| A. | The number of neutrons is the same, but the number of protons is different. |
| B. | Same number of protons but different number of neutrons |
| C. | The number of protons and neutrons is the same. |
| D. | Both protons and neutrons have different numbers. |
| Answer» C. The number of protons and neutrons is the same. | |
| 1854. |
What is 17Cl³⁵ and 17Cl? |
| A. | Isosceles |
| B. | isotopes |
| C. | Symmetrical |
| D. | isocratic |
| Answer» C. Symmetrical | |
| 1855. |
Which of the following is a sympneutronic group? |
| A. | 6C¹²7N¹⁴8O¹⁶ |
| B. | 6C¹²7N¹⁴8O¹⁸ |
| C. | 6C¹²7N¹⁵8O¹⁶ |
| D. | 6C¹⁴7N¹⁵8O¹⁶ |
| Answer» E. | |
| 1856. |
Atoms that have the same number of protons but different numbers of neutrons are called? |
| A. | isotopes |
| B. | isobaric |
| C. | Isosceles |
| D. | Samneutronic |
| Answer» B. isobaric | |
| 1857. |
What are 8O¹⁶8O¹⁷ and 8O called? |
| A. | isotopes |
| B. | constituent |
| C. | isobaric |
| D. | Samneutronic |
| Answer» B. constituent | |
| 1858. |
Soda water formed when carbon dioxide is passed through water? |
| A. | is an oxidizer |
| B. | is alkaline in nature |
| C. | is acidic in nature |
| D. | is a deterrent |
| Answer» D. is a deterrent | |
| 1859. |
3Li⁷ and 4Be are? |
| A. | isotope |
| B. | isobars |
| C. | isotone |
| D. | isomer |
| Answer» D. isomer | |
| 1860. |
15P³¹31 and 14Si³⁰ are? |
| A. | isotopes |
| B. | isocratic |
| C. | even electronic |
| D. | Samneutronic |
| Answer» E. | |
| 1861. |
All radioactive substances after decay - finally turn into what? |
| A. | Corundum |
| B. | lead |
| C. | cadmium |
| D. | Such as |
| Answer» C. cadmium | |
| 1862. |
Which radioactive element is named after the country of its discoverer? |
| A. | radium |
| B. | uranium |
| C. | polonium |
| D. | Palladium |
| Answer» D. Palladium | |
| 1863. |
The emission of which of the following increases the atomic number of an element by one? |
| A. | alpha particle |
| B. | beta particle |
| C. | proton |
| D. | neutron |
| Answer» C. proton | |
| 1864. |
What are 36Kr⁸⁶ and 37Rb⁸⁷ called? |
| A. | isotopes |
| B. | isocratic |
| C. | Samneutronic |
| D. | even electronic |
| Answer» D. even electronic | |
| 1865. |
Which of the following has the highest penetrating power in the radiations emanating from the nucleus? |
| A. | of alpha rays |
| B. | of beta rays |
| C. | of gamma rays |
| D. | none of these |
| Answer» D. none of these | |
| 1866. |
alpha rays? |
| A. | H⁺ ion |
| B. | He ion |
| C. | electron |
| D. | protron |
| Answer» C. electron | |
| 1867. |
B - rays are made up of? |
| A. | from positively charged particles |
| B. | from negatively charged particles |
| C. | from indifferent particles |
| D. | none of these |
| Answer» C. from indifferent particles | |
| 1868. |
Nuclear Suppliers Group (NSG) is in? |
| A. | 50 countries |
| B. | 45 countries |
| C. | 35 countries |
| D. | 40 countries |
| Answer» C. 35 countries | |
| 1869. |
What is the unit of Curie? |
| A. | radioactivity |
| B. | heat |
| C. | heat |
| D. | energy |
| Answer» B. heat | |
| 1870. |
What is the change in atomic number and atomic mass due to emission of an alpha particle? |
| A. | Atomic number increases by 1 and atomic mass remains unchanged |
| B. | Atomic number decreased by 1 and atomic mass unchanged |
| C. | 1 decrease in atomic number and 4 increase in atomic mass |
| D. | 2 in atomic number and decrease in atomic mass by 4 |
| Answer» E. | |
| 1871. |
What is a ray emanating from a radioactive substance? |
| A. | Elu |
| B. | Beta |
| C. | gamma |
| D. | All of the above |
| Answer» E. | |
| 1872. |
A radioactive element whose large deposits are found in India? |
| A. | Plutonium |
| B. | radium |
| C. | Thorium |
| D. | uranium |
| Answer» D. uranium | |
| 1873. |
How is energy produced in a nuclear reactor? |
| A. | controlled by nuclear fusion |
| B. | by uncontrolled nuclear fusion |
| C. | controlled nuclear fission |
| D. | by uncontrolled nuclear fission |
| Answer» D. by uncontrolled nuclear fission | |
| 1874. |
The substance formed after the emission of 11Na²² to 1B is? |
| A. | Mg |
| B. | Mn |
| C. | Ag |
| D. | Pb |
| Answer» B. Mn | |
| 1875. |
What type of charge do beta rays carry? |
| A. | positive |
| B. | negative |
| C. | zero charge |
| D. | none of these |
| Answer» C. zero charge | |
| 1876. |
What is gamma rays? |
| A. | uncharged particles from outer space |
| B. | uncharged high energy ray coming from outer space |
| C. | high energy rays emitted by radioactive materials |
| D. | uncharged particles emitted by radioactive substances |
| Answer» D. uncharged particles emitted by radioactive substances | |
| 1877. |
If the amount of a radioactive substance is doubled, the rate of radioactive decay is . . . |
| A. | remains unchanged |
| B. | remains half |
| C. | increases by 2 times |
| D. | is doubled |
| Answer» B. remains half | |
| 1878. |
If the half-life of a radioactive material is one day, then after 4 days what part of its initial quantity will be left? |
| A. | 12 / 1 / 12% |
| B. | 26 / 1 / 4% |
| C. | 6 / 1 / 4% |
| D. | 16 / 1 / 4% |
| Answer» D. 16 / 1 / 4% | |
| 1879. |
Radioactive wastes are risky because their presence in the atmosphere |
| A. | bacteria are destroyed |
| B. | Bacteria and viruses abound in abundance. |
| C. | There is only vegetative damage to organisms. |
| D. | vegetative and genetic damage to organisms |
| Answer» E. | |
| 1880. |
Which of the metals is found in abundance in India from the point of view of nuclear energy? |
| A. | uranium |
| B. | Thorium |
| C. | cadmium |
| D. | beryllium |
| Answer» C. cadmium | |
| 1881. |
What is a beta particle? |
| A. | Funded |
| B. | Negative |
| C. | Moody |
| D. | All of the above |
| Answer» C. Moody | |
| 1882. |
Who discovered artificial radiosensitivity? |
| A. | madam curie |
| B. | Henry Bequerel |
| C. | Anest Rutherford |
| D. | F . Joliet and I Curie |
| Answer» C. Anest Rutherford | |
| 1883. |
A device that converts mechanical energy into electrical energy? |
| A. | inverter |
| B. | dynamos |
| C. | combustion engine |
| D. | No one |
| Answer» C. combustion engine | |
| 1884. |
What is the process of fragmentation responsible for? |
| A. | to release energy from the sun |
| B. | to release energy from a hydrogen bomb |
| C. | to release energy in an atomic bomb |
| D. | to release energy in a chemical reaction |
| Answer» D. to release energy in a chemical reaction | |
| 1885. |
The half-life of a radioactive material is 10 days. What does this mean? |
| A. | The substance will completely disintegrate in 20 days. |
| B. | The substance will completely disintegrate in 40 days |
| C. | 3/4 of the substance will disintegrate in 20 days |
| D. | 1/4th of the substance will disintegrate in 5 days |
| Answer» D. 1/4th of the substance will disintegrate in 5 days | |
| 1886. |
A radio station receives broadcasts on the 30 meter band, what is the frequency of vehicle waves transmitted by this station? |
| A. | 10KHz |
| B. | 100KHz |
| C. | 100MHz |
| D. | 10MHz |
| Answer» E. | |
| 1887. |
The process of destroying ozone by dichloro difluoromethane (CClF₂) is liberated? |
| A. | chlorine |
| B. | fluorine |
| C. | nitrogen dioxide |
| D. | bromine |
| Answer» B. fluorine | |
| 1888. |
What is the actual electronic configuration of Cr? |
| A. | 3d⁵4s¹ |
| B. | 3d⁶4s⁰ |
| C. | 3d⁴4s² |
| D. | none of these |
| Answer» B. 3d⁶4s⁰ | |
| 1889. |
Isotope C₁₄ is associated with? |
| A. | diagnosed with cancer |
| B. | From the age determination of fossils |
| C. | determining the age of the earth |
| D. | with tracer technology |
| Answer» C. determining the age of the earth | |
| 1890. |
Which compound is not obtained by polymerization of alkynes? |
| A. | Benzene |
| B. | mesethyl oxide |
| C. | Binylacetylene |
| D. | mesitylene |
| Answer» C. Binylacetylene | |
| 1891. |
The mass of an ULFA ray emitted from a radioactive element is 6.645×10⁻²⁷ kg, which is equal to? |
| A. | of hydrogen nuclei |
| B. | negatively charged particle |
| C. | of helium nucleus |
| D. | of neutrons |
| Answer» D. of neutrons | |
| 1892. |
Which of the following is paramagnetic? |
| A. | C₂ |
| B. | O₂²⁻ |
| C. | O₂⁻ |
| D. | O₂²⁺ |
| Answer» D. O₂²⁺ | |
| 1893. |
Which of the following is/are metalloids? |
| A. | arsenic |
| B. | antimony |
| C. | bismuth |
| D. | all these |
| Answer» E. | |
| 1894. |
Which substance is found in nature in three states (solid, liquid and gas)? |
| A. | H₂O |
| B. | H₂SO₄ |
| C. | NH₃ |
| D. | SO₂ |
| Answer» B. H₂SO₄ | |
| 1895. |
What is an example of a gaseous element? |
| A. | nitrogen |
| B. | hydrogen |
| C. | chlorine |
| D. | All of the above |
| Answer» E. | |
| 1896. |
An atom of an element has 19 protons and 20 neutrons. What will be its mass number? |
| A. | 39 |
| B. | 1 |
| C. | 20 |
| D. | 12 |
| Answer» B. 1 | |
| 1897. |
If both the mass and velocity of matter are doubled by their magnitude, what will be the kinetic energy? |
| A. | double |
| B. | quadruple |
| C. | eight times |
| D. | sixteen times |
| Answer» D. sixteen times | |
| 1898. |
Stainless steel is an alloy while air is a . . . |
| A. | mix |
| B. | Compound |
| C. | Element |
| D. | Merger |
| Answer» B. Compound | |
| 1899. |
Which metal has electronic configuration 3d¹⁰4S¹. |
| A. | Out |
| B. | Such as |
| C. | copper |
| D. | cadmium |
| Answer» D. cadmium | |
| 1900. |
Which one of the following metals is mainly used in mobile phone batteries? |
| A. | copper (copper) |
| B. | Zinc |
| C. | Nickel |
| D. | lithium |
| Answer» E. | |