MCQOPTIONS
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MCQOPTIONS
This section includes 2539 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1851. |
Anaemic patient are deficient in _____? |
| A. | Iron |
| B. | Calcium |
| C. | Magnesium |
| D. | Iodine |
| Answer» B. Calcium | |
| 1852. |
Arrange the following metals in the decreasing order of reactivity: |
| A. | Sodium > silver > iron > gold |
| B. | Gold > silver > iron > sodium |
| C. | Iron > sodium > silver > gold |
| D. | Sodium > iron > silver > gold |
| Answer» E. | |
| 1853. |
Nitration of benzoic acid gives following major product |
| A. | o-nitro benzoic acid |
| B. | m-nitro benzoic acid |
| C. | p-nitro benzoic acid |
| D. | all of the above |
| Answer» C. p-nitro benzoic acid | |
| 1854. |
Radon is formed in the alpha decay of ________. |
| A. | radium |
| B. | uranium |
| C. | actinium |
| D. | thorium |
| Answer» B. uranium | |
| 1855. |
Activity of heterogeneous catalysis depends upon : |
| A. | total surface area only |
| B. | the number of active sites per unit amount of catalyst only |
| C. | method of preparation only |
| D. | total surface area, number of active sites and method of preparation |
| Answer» B. the number of active sites per unit amount of catalyst only | |
| 1856. |
In which of the following processes oxygen from the atmosphere is not used up? |
| A. | Combustion |
| B. | Respiration |
| C. | Formation of oxides of nitrogen |
| D. | Photosynthesis |
| Answer» E. | |
| 1857. |
0.5 moles of gas A and x moles of gas B exert a pressure of 200 Pa in a container of volume 10 m3 at 1000 K. Given R is the gas constant in k-1 mol-1, x is: |
| A. | \(\frac{{2{\rm{R}}}}{{4 + {\rm{R}}}}\) |
| B. | \(\frac{{2{\rm{R}}}}{{4 - {\rm{R}}}}\) |
| C. | \({\rm{\;}}\frac{{4 - {\rm{R}}}}{{2{\rm{R}}}}\) |
| D. | \({\rm{\;}}\frac{{4 + {\rm{R}}}}{{2{\rm{R}}}}\) |
| Answer» D. \({\rm{\;}}\frac{{4 + {\rm{R}}}}{{2{\rm{R}}}}\) | |
| 1858. |
In the following reaction:\(\text{Carbonly compound}\ + MeOH \overset{HCl}{\rightleftharpoons}acetal\)Rate of the reaction is the highest for: |
| A. | Acetone as substrate and methanol in excess |
| B. | Propanal as substrate and methanol in stoichiometric amount |
| C. | Propanal as substrate and methanol in excess |
| D. | Acetone as substrate and methanol in stoichiometric amount. |
| Answer» D. Acetone as substrate and methanol in stoichiometric amount. | |
| 1859. |
In the context of isotopes of any element, which of the following statements is NOT correct? |
| A. | They have the same mass number |
| B. | They have identical chemical properties |
| C. | They differ in physical properties |
| D. | They have same atomic number |
| Answer» B. They have identical chemical properties | |
| 1860. |
Antiseptic properties in soap are found due to one of the following mixtures- A. BithionalB. Sodium lauryl sulfateC. RosinD. Sodium dodecyl benzenesulfonate |
| A. | B |
| B. | D |
| C. | C |
| D. | A |
| Answer» E. | |
| 1861. |
In the following skew conformation of ethane, H-C-C-H’’ dihedral angle is: |
| A. | 58° |
| B. | 149° |
| C. | 151° |
| D. | 120° |
| Answer» C. 151° | |
| 1862. |
Curd is formed with the help of ............. bacteria. |
| A. | Bifidobacteria |
| B. | Lactic acid |
| C. | Lactobacillus acidophilus |
| D. | Bacillus coagulans |
| Answer» D. Bacillus coagulans | |
| 1863. |
Litmus, a natural dye, is an extract of- |
| A. | China rose |
| B. | Lichen |
| C. | Beet root |
| D. | Blue berries |
| Answer» C. Beet root | |
| 1864. |
Consider the following pairs.1] Size of atomic nucleus: 10−152] Size of red blood corpuscle: 10−43] Radius of Earth: 1084] Size of our Galaxy: 1018Which of the above pairs are correctly matched? |
| A. | Only 1 |
| B. | 1 and 4 only |
| C. | 2, 3 and 4 only |
| D. | 1, 3 and 4 only |
| Answer» B. 1 and 4 only | |
| 1865. |
Chemical nature of an element depends on which of the followings? |
| A. | On proton |
| B. | On charge |
| C. | On valence electron |
| D. | None of the option is correct. |
| Answer» D. None of the option is correct. | |
| 1866. |
An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speeds of the electron and the proton are Ve and Vp respectively. Which one of the following relations is correct? |
| A. | Ve > Vp |
| B. | Ve < Vp |
| C. | Ve = Vp |
| D. | Cannot be determined |
| Answer» B. Ve < Vp | |
| 1867. |
Atomic number of which of the following elements is greater than that of Magnesium. |
| A. | Neon |
| B. | Fluorine |
| C. | Sodium |
| D. | Aluminium |
| Answer» E. | |
| 1868. |
Chromosomes network can not be stained by |
| A. | Crystal violet |
| B. | Haematoxylin |
| C. | Carmin |
| D. | Feulgen stain |
| Answer» B. Haematoxylin | |
| 1869. |
Name three elements that have a Single electron outermost Shells? |
| A. | Magnesium, Helium, Neon |
| B. | Magnesium, Calcium, Barium |
| C. | Helium, Neon, Argon |
| D. | Lithium, Sodium, Potassium |
| Answer» E. | |
| 1870. |
NaCl is a salt which is made up of: |
| A. | Strong acid and weak base |
| B. | Weak acid and weak base |
| C. | Strong acid and strong base |
| D. | Weak acid and strong base |
| Answer» D. Weak acid and strong base | |
| 1871. |
_____ reaction occurs when Sodium Sulphate reacts with Barium Chloride. |
| A. | Single combination |
| B. | Single displacement |
| C. | Double displacement |
| D. | Double combination |
| Answer» D. Double combination | |
| 1872. |
Ethanoic acid is commonly called- |
| A. | Sulphonic acid |
| B. | Sulphuric acid |
| C. | Hydrochloric acid |
| D. | Acetic acid |
| Answer» E. | |
| 1873. |
Covalent compounds- |
| A. | Have low melting and boiling point |
| B. | All of the options |
| C. | Are poor conductors of electricity |
| D. | Are formed by the sharing of electrons in the bonding atoms |
| Answer» C. Are poor conductors of electricity | |
| 1874. |
Burning of fossil fuels causes increased amounts of carbon dioxide in the atmosphere and what is the name of the harmful effect caused due to this? |
| A. | Pollution effect |
| B. | Chemical effect |
| C. | Greenhouse effect |
| D. | Carbon effect |
| Answer» D. Carbon effect | |
| 1875. |
______ does NOT contain carbonyl group. |
| A. | Aldehyde |
| B. | Carboxyl acid |
| C. | Ketone |
| D. | Ethanol |
| Answer» E. | |
| 1876. |
CO2 turns lime water milky, due to the formation of ______. |
| A. | Ca2O2 |
| B. | CaCO3 |
| C. | Ca(OH)2 |
| D. | Ca2O |
| Answer» C. Ca(OH)2 | |
| 1877. |
If an atom of an element has 11 protons and 12 neutrons in its nucleus, the mass number of the element is: |
| A. | 35 |
| B. | 12 |
| C. | 23 |
| D. | 11 |
| Answer» D. 11 | |
| 1878. |
In his periodic table, Mendeleev could NOT assign a correct position to _________. |
| A. | Carbon |
| B. | Nitrogen |
| C. | Hydrogen |
| D. | Oxygen |
| Answer» D. Oxygen | |
| 1879. |
In the Modern Periodic Table, elements are arranged in ________. |
| A. | Decreasing order of their atomic mass number |
| B. | Increasing order of their atomic mass number |
| C. | Increasing order of their atomic number |
| D. | Decreasing order of their atomic number |
| Answer» D. Decreasing order of their atomic number | |
| 1880. |
Atomic mass of Carbon is 12 and that of Helium is 4. State which of the following statements is true for 1 mole of each of the elements? |
| A. | 1 mole of Carbon will contain 3 times more atoms than 1 mole of Helium. |
| B. | 1 mole of Helium will contain 3 times more atoms than 1 mole of Carbon. |
| C. | 1 mole of Carbon will contain one-third the number of atoms present in 1 mole of Helium. |
| D. | 1 mole of Carbon will contain the same number of atoms as present in 1 mole of Helium. |
| Answer» E. | |
| 1881. |
Find the odd man out: Si, P, Ge, and As, |
| A. | Si |
| B. | As |
| C. | P |
| D. | Ge |
| Answer» D. Ge | |
| 1882. |
______ is the number of shells for elements of the 3rd period. |
| A. | 3 |
| B. | 1 |
| C. | 0 |
| D. | 2 |
| Answer» B. 1 | |
| 1883. |
_____ are the elements of group 18. |
| A. | Alkaline earth metal |
| B. | Noble gases |
| C. | Halogens |
| D. | Alkali metals |
| Answer» C. Halogens | |
| 1884. |
Consider the following statements about mixture:1. A substance can be separated into other kinds of matter by any physical process.2. Dissolved sodium chloride can be separated from water by the physical process of evaporation.Which of these statements given above is/are correct? |
| A. | 1 only |
| B. | 2 only |
| C. | Both 1 and 2 |
| D. | Neither 1 nor 2 |
| Answer» C. Both 1 and 2 | |
| 1885. |
A basic solution changes the colour of turmeric indicator from ________. |
| A. | Yellow to red |
| B. | Yellow to black |
| C. | Yellow to blue |
| D. | Yellow to green |
| Answer» B. Yellow to black | |
| 1886. |
Non-stick frying pans are coated with |
| A. | Orlon |
| B. | Teflon |
| C. | Polystyrene |
| D. | Polypropylene |
| Answer» C. Polystyrene | |
| 1887. |
Atomic number and mass number of an element M are 25 and 52 respectively. The number of electrons, protons and neutrons in M2+ ion are respectively- |
| A. | 25, 25 and 27 |
| B. | 25, 27 and 25 |
| C. | 27, 25 and 27 |
| D. | 23, 25 and 27 |
| Answer» E. | |
| 1888. |
Majority of the iron ore found in India is of which quality? |
| A. | Haematite |
| B. | Magnetite |
| C. | Limonite |
| D. | Siderite |
| Answer» B. Magnetite | |
| 1889. |
Consider the following statement: "An atomic number of an element is a more fundamental property than its atomic mass." Who among the following scientists has made the above statement? |
| A. | Dmitri Mendeleev |
| B. | Henry Moseley |
| C. | J.J. Thomson |
| D. | Ernest Rutherford |
| Answer» C. J.J. Thomson | |
| 1890. |
If formula of sodium salt of an anion X is \(Na_2X\), then the formula of its aluminium salt would be |
| A. | AlX |
| B. | \(AlX_3\) |
| C. | \(Al_2X_3\) |
| D. | \(Al_3X_2\) |
| Answer» D. \(Al_3X_2\) | |
| 1891. |
Match List I with List II and select the correct answer using the code given below the Lists:List I (Noble gas)List II (Use)A. Argon1. In lights for advertising displayB. Neon2. Airport landing lights and in light housesC. Krypton3. Light in photographer’s flash gunD. Xenon4. In tungsten filament to last Code: |
| A. | A-3, B-1, C-2, D-4 |
| B. | A-3, B-2, C-1, D-4 |
| C. | A-4, B-2, C-1, D-3 |
| D. | A-4, B-1, C-2, D-3 |
| Answer» E. | |
| 1892. |
An element M has a atomic mass 19 and atomic number 9. Its ion is represented as |
| A. | M+ |
| B. | M2+ |
| C. | M- |
| D. | M2- |
| Answer» D. M2- | |
| 1893. |
If a body is NOT homogeneous, then its density is a function of its ___________. |
| A. | pressure |
| B. | acceleration |
| C. | position |
| D. | velocity |
| Answer» D. velocity | |
| 1894. |
________ is a lustrous non-metal. |
| A. | Sodium |
| B. | Iodine |
| C. | Sulphur |
| D. | Phosphorus |
| Answer» C. Sulphur | |
| 1895. |
In modern periodic table, an element 'X' has ns2np3 configuration in the valence shell. 'X' belongs to the group; |
| A. | IIIA |
| B. | VA |
| C. | VIA |
| D. | IIA |
| Answer» C. VIA | |
| 1896. |
One feels cold after a dip in sea water due to _______. |
| A. | Convection currents |
| B. | The difference in temperature between land and sea |
| C. | The deposition of salt on the body |
| D. | The evaporation of water on the body |
| Answer» E. | |
| 1897. |
_________ is the only non-metal present in Group 1 of the Modern Periodic Table. |
| A. | Cobalt |
| B. | Rubidium |
| C. | Potassium |
| D. | Hydrogen |
| Answer» E. | |
| 1898. |
In the reaction MgO + CO → Mg + CO2, the substance oxidised is- |
| A. | Magnesium |
| B. | Carbon monoxide |
| C. | Magnesium oxide |
| D. | Carbon dioxide |
| Answer» C. Magnesium oxide | |
| 1899. |
Density of water is _________. |
| A. | 500 kg/m3 |
| B. | 1000 kg/m3 |
| C. | 1500 kg/m3 |
| D. | 2000 kg/m3 |
| Answer» C. 1500 kg/m3 | |
| 1900. |
Pyrolusite is an ore/mineral of which of the following element? |
| A. | Mercury |
| B. | Manganese |
| C. | Molybdenum |
| D. | Lead |
| Answer» C. Molybdenum | |