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.
| 701. |
Molecules in Solids______ |
| A. | are free to move about |
| B. | cannot move |
| C. | interchange positions frequently |
| D. | are spherical in shape |
| Answer» C. interchange positions frequently | |
| 702. |
Proton has ______ charge. |
| A. | Positive |
| B. | Infinite |
| C. | Neutral |
| D. | Negative |
| Answer» B. Infinite | |
| 703. |
Match the following items in Column I with the corresponding items in Column IIColumn IColumn II(i) Na2CO3.10H2OA. Portland cement ingredient(ii) Mg(HCO3)2B. Castner-Kellner(iii) NaOHC. Solvay process(iv) Ca3Al2O6D. Temporary hardness |
| A. | (i)-(D); (ii)-(A); (iii)-(B); (iv)-(C) |
| B. | (i)-(B); (ii)-(C); (iii)-(A); (iv)-(D) |
| C. | (i)-(C); (ii)-(B); (iii)-(D); (iv)-(A) |
| D. | (i)-(C); (ii)-(D); (iii)-(B); (iv)-(A) |
| Answer» E. | |
| 704. |
Ozone at the higher levels of the atmosphere is a product of _________ molecule. |
| A. | UV radiation acting on Hydrogen |
| B. | UV radiation acting on Helium |
| C. | UV radiation acting on Oxygen |
| D. | UV radiation acting on Nitrogen |
| Answer» D. UV radiation acting on Nitrogen | |
| 705. |
Among the following one which exhibits ferromagnetism is |
| A. | AI |
| B. | Na |
| C. | Zn |
| D. | Co |
| Answer» E. | |
| 706. |
In which of the following elements isn’t included in structural elements |
| A. | Cadmium |
| B. | Carbon |
| C. | Oxygen |
| D. | Nitrogen |
| Answer» B. Carbon | |
| 707. |
______ Enzyme converts glucose into ethyl alcohol and carbon dioxide. |
| A. | Invertase |
| B. | Zymase |
| C. | Diastase |
| D. | Maltase |
| Answer» C. Diastase | |
| 708. |
In a chemical reaction between sulphuric acid and barium chloride solution the white precipitates formed are of: |
| A. | Hydrochloric acid |
| B. | Barium sulphate |
| C. | Chlorine |
| D. | Sulphur |
| Answer» C. Chlorine | |
| 709. |
Chlorine gas is NOT useful in _________. |
| A. | water treatment |
| B. | making pesticides |
| C. | swimming pools |
| D. | making artificial fiber |
| Answer» E. | |
| 710. |
Directions: The following items consist of two statements, Statement I and Statement II. You are to examine these two statements carefully and select the answers to these items using the code given below:Statement I: Colour of Nitrogen dioxide changes to colourless at low temperature.Statement II: At low temperature Nitrogen tetroxide (N2O4) is formed which is colourless. |
| A. | Both the statements are individually true and Statement II is the correct explanation of statement I |
| B. | Both the statements are individually true but Statement II is not the correct explanation of Statement I |
| C. | Statement I is true but Statement II is false |
| D. | Statement I is false but Statement II is true |
| Answer» B. Both the statements are individually true but Statement II is not the correct explanation of Statement I | |
| 711. |
Ethanoic acid on reaction with methyl magnesium bromide gives - Identify |
| A. | Propanone |
| B. | Ethane |
| C. | Methane |
| D. | Ethanol |
| Answer» D. Ethanol | |
| 712. |
As the pH value increases from 7 to 14, it represents: |
| A. | an increase in the OH- ion concentration |
| B. | no change in the H+ ion concentration |
| C. | an increase in the H+ ion concentration |
| D. | a decrease in the OH- ion concentration |
| Answer» B. no change in the H+ ion concentration | |
| 713. |
Chemical Formula of Water is ________. |
| A. | O2H |
| B. | OH |
| C. | HO |
| D. | H2O |
| Answer» E. | |
| 714. |
Potassium permanganate is used to purify water as its is |
| A. | sterilizing |
| B. | oxidizing |
| C. | reducing |
| D. | leaching |
| Answer» C. reducing | |
| 715. |
If the temperature and pressure of 2dm3 of CO2 are doubled, then volume of CO2 would become ? |
| A. | 4 dm3 |
| B. | 8 dm3 |
| C. | 2 dm3 |
| D. | 5 dm3 |
| Answer» D. 5 dm3 | |
| 716. |
Heavy water is ________. |
| A. | Rainwater |
| B. | pH-7 |
| C. | Tritium Oxide |
| D. | Deuterium Oxide |
| Answer» E. | |
| 717. |
______ is the non-enzymatic reaction between reducing sugars such as glucose and proteins, lipids or nucleic acids. |
| A. | Phosphorylation |
| B. | Pyruvate oxidation |
| C. | Glycation |
| D. | Cellular respiration |
| Answer» D. Cellular respiration | |
| 718. |
Consider the following statementsa) The pH of a mixture containing 400 mL of 0.1 M H2 SO4 and 400 mL of 0.1 M NaOH will be approximately 1.3(b) Ionic product of water is temperature dependent.(c) A monobasic acid with Ka = 10-5 has a pH=5. The degree of dissociation of this acid is 50%.(d) The Le-Chatelier’s principle is not applicable to common-ion effect.The correct statements are: |
| A. | (a), (b) and (d) |
| B. | (a), (b) and (c) |
| C. | (b) and (c) |
| D. | (a) and (b) |
| Answer» C. (b) and (c) | |
| 719. |
In the reaction H2O2 + Cl2 → 2HCl + O2, H2O2 acts as: |
| A. | An acid |
| B. | An oxidising agent |
| C. | A reducing agent |
| D. | A base |
| Answer» D. A base | |
| 720. |
An element which is not found in nature is |
| A. | Radium |
| B. | Technetium |
| C. | Polonium |
| D. | Helium |
| Answer» B. Technetium | |
| 721. |
Benzene reacts with chlorine in the presence of an iron catalyst to produce |
| A. | benzene hexachloride |
| B. | benzyl chloride |
| C. | chlorobenzene |
| D. | benzoyl chloride |
| Answer» D. benzoyl chloride | |
| 722. |
K2HgI4 is 40% ionized in aqueous solution. The value of its Van't Hoff factor (i) is |
| A. | 1.6 |
| B. | 1.8 |
| C. | 2.2 |
| D. | 2.0 |
| Answer» C. 2.2 | |
| 723. |
______ is the main fatty acid in coconut oil and in palm kernel oil that has antimicrobial properties. |
| A. | Sulphuric acid |
| B. | Lactic acid |
| C. | Lauric acid |
| D. | Acetic acid |
| Answer» D. Acetic acid | |
| 724. |
If Metal A displaces Metal B from its solution, then Metal A_____. |
| A. | Is more reactive than B |
| B. | Is less reactive than B |
| C. | Is heavier than B |
| D. | Has the same reactivity as B |
| Answer» B. Is less reactive than B | |
| 725. |
Common salt besides being used as condiment and food preservative can also be used as the raw material for making |
| A. | Baking soda |
| B. | Sodium hydroxide |
| C. | All of the options |
| D. | Bleaching powder |
| Answer» D. Bleaching powder | |
| 726. |
An Organic compound ‘A’ is oxidizing with Na2 O2 followed by boiling with HNO3. The resultant solution is then treated with ammonium molybdate to yield a yellow precipitate. Based on above observation, the element present in the given compound is: |
| A. | Nitrogen |
| B. | Phosphorus |
| C. | Fluorine |
| D. | Sulphur |
| Answer» C. Fluorine | |
| 727. |
Electronegativity ______ from left to right in a row in the periodic table and electro positivity ______ from left to right in a row in the periodic table. |
| A. | increases, decreases |
| B. | decreases, constant |
| C. | increases, increases |
| D. | decreases, increases |
| Answer» B. decreases, constant | |
| 728. |
Number of neutrons in \(^{56}_{26}Fe\) will be |
| A. | 26 |
| B. | 56 |
| C. | 30 |
| D. | 28 |
| Answer» D. 28 | |
| 729. |
In the etching of glass, we use the acid: |
| A. | HBr |
| B. | HCl |
| C. | HF |
| D. | HI |
| Answer» C. HF | |
| 730. |
A solution contains 20 g of solute in 180 g of solvent. If the solvent is water, what is the concentration of the solution in terms of mass by mass percentage ? |
| A. | 11.1% |
| B. | 22.2% |
| C. | 10% |
| D. | 2% |
| Answer» D. 2% | |
| 731. |
Maltose on treatment with dilute HCl gives: |
| A. | D-Glucose and D-Fructose |
| B. | D-Fructose |
| C. | D-Galactose |
| D. | D-Glucose |
| Answer» E. | |
| 732. |
Normally the numbers of isotopes in which hydrogen can exist are? |
| A. | 1 |
| B. | 4 |
| C. | 2 |
| D. | 3 |
| Answer» E. | |
| 733. |
In a solution made by dissolving 50 grams of sugar in 150 grams of water, the concentration of mass will be _____. |
| A. | 48.2% |
| B. | 3% |
| C. | 25% |
| D. | 50% |
| Answer» D. 50% | |
| 734. |
Breaking of silver bromide into silver and bromine is an example of __________. |
| A. | Combination reaction |
| B. | Redox reaction |
| C. | Decomposition reaction |
| D. | Neutralisation reaction |
| Answer» D. Neutralisation reaction | |
| 735. |
Chlorine gas is a major component of which of the following? |
| A. | Water |
| B. | Tear gas |
| C. | Liquefied Petroleum Gas |
| D. | Gobar gas |
| Answer» C. Liquefied Petroleum Gas | |
| 736. |
Among the following molecules/ions,\({\rm{C}}_2^{2 - },{\rm{\;N}}_2^{2 - },{\rm{O}}_2^{2 - },{{\rm{O}}_2}\)which one is diamagnetic and has the shortest bond length? |
| A. | O2 |
| B. | \(N_2^{2 - }\) |
| C. | \(O_2^{2 - }\) |
| D. | \(C_2^{2 - }\) |
| Answer» E. | |
| 737. |
Ores are roasted in order to- |
| A. | Remove carbon dioxide and water |
| B. | Remove sulphur |
| C. | Dehydrate the ore |
| D. | Fuse the ore |
| Answer» C. Dehydrate the ore | |
| 738. |
During electroplating of silver on an iron spoon. |
| A. | mass of the cathode increases |
| B. | mass of the cathode decreases |
| C. | mass of the anode increases |
| D. | concentration of the electrolyte increases |
| Answer» B. mass of the cathode decreases | |
| 739. |
Air pollution that occurs in sunlight is: |
| A. | Reducing smog |
| B. | Acid rain |
| C. | Oxidising smog |
| D. | Fog |
| Answer» D. Fog | |
| 740. |
An atom has a mass number of 23 and atomic number 11. The number of protons is ________. |
| A. | 11 |
| B. | 23 |
| C. | 12 |
| D. | 22 |
| Answer» B. 23 | |
| 741. |
Atoms are mainly made of |
| A. | Neutrons |
| B. | Protons |
| C. | Electrons |
| D. | Protons, electrons and neutrons |
| Answer» E. | |
| 742. |
Bohr's orbits are called stationary, because ________. |
| A. | Protons remain in the nuclei and are stationary |
| B. | Electrons in them are stationary |
| C. | Their orbits have fixed radii |
| D. | Electrons in them have fixed energy |
| Answer» E. | |
| 743. |
Among the followingthe compounds which can be prepared by nucleophilic substitution reaction are: |
| A. | III, IV, and V |
| B. | I, II, and VI |
| C. | II, IV, and VI |
| D. | I, III, and V |
| Answer» D. I, III, and V | |
| 744. |
In graphite, each carbon atom is bonded to three other carbon atoms |
| A. | forming a three-dimensional structure |
| B. | in the same plane giving a hexagonal array |
| C. | in the same plane giving a square array |
| D. | in the same plane giving a pentagonal array |
| Answer» C. in the same plane giving a square array | |
| 745. |
Fluoride toothpaste is sometimes recommended because fluoride |
| A. | prevents plaque formation |
| B. | hardens the enamel of the tooth |
| C. | kills pathogenic bacteria |
| D. | prevents tooth ache |
| Answer» C. kills pathogenic bacteria | |
| 746. |
How can one state of matter be changed into another? |
| A. | By absorbing radiating heat energy |
| B. | By using electrolytes |
| C. | By increasing pressure |
| D. | By using acids and bases |
| Answer» B. By using electrolytes | |
| 747. |
Iron nails become ______ after being dipped in copper sulphate solution. |
| A. | greenish |
| B. | brownish |
| C. | greyish |
| D. | bluish |
| Answer» C. greyish | |
| 748. |
How many grams of NaOH are needed to make 100 ml. of a 0.5 M solution of NaOH? (Atomic weight : Na=23, 0+16, H+1) |
| A. | 2 |
| B. | 20 |
| C. | 4 |
| D. | 1 |
| Answer» B. 20 | |
| 749. |
Molybdenite is an ore/mineral of ________. |
| A. | Molybdenum |
| B. | Nickel |
| C. | Silver |
| D. | Tin |
| Answer» B. Nickel | |
| 750. |
Metal oxides are ________ in nature. |
| A. | acidic |
| B. | neutral |
| C. | organic |
| D. | basic |
| Answer» E. | |