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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.
| 1751. |
Calcium hydroxide, reacts with carbon dioxide to produce- |
| A. | Both salt and water |
| B. | Salt |
| C. | Metal |
| D. | Water |
| Answer» B. Salt | |
| 1752. |
A Liquid metal at room temperature reacts with ozone to form - Identify |
| A. | Br2O |
| B. | Hg2O |
| C. | Rb2O |
| D. | HgO |
| Answer» C. Rb2O | |
| 1753. |
Chlorine is |
| A. | Oxidizing agent |
| B. | Bleaching agent |
| C. | Disinfectant |
| D. | All the above |
| Answer» E. | |
| 1754. |
Λm° for NaCl, HCl and NaA are 126.4, 425.9 and 100.5 S cm2 mol-1, respectively. If the conductivity of 0.001 M HA is 5 × 10-5 S cm-1, degree of dissociation of HA is |
| A. | 0.025 |
| B. | 0.50 |
| C. | 0.75 |
| D. | 0.125 |
| Answer» E. | |
| 1755. |
25°C is equivalent to how many degrees on the Fahrenheit scale? |
| A. | 80 |
| B. | 75 |
| C. | 87 |
| D. | 77 |
| Answer» E. | |
| 1756. |
An element with an atomic number of ______ will form a basic oxide. |
| A. | 7 |
| B. | 20 |
| C. | 17 |
| D. | 6 |
| Answer» C. 17 | |
| 1757. |
_______ are atoms/molecules/ions containing the same number of electrons.A. IsotonesB. IsotopesC. IsoelectronicD. Valence Isoelectronic |
| A. | C |
| B. | A |
| C. | D |
| D. | B |
| Answer» B. A | |
| 1758. |
As per Hume-Rothery rules of solid solubility, the difference between atomic sizes of solute and solvent should be less than : |
| A. | 20 % |
| B. | 25 % |
| C. | 15 % |
| D. | 28 % |
| Answer» D. 28 % | |
| 1759. |
Conversion of excess amino acid into urea takes place in ________. |
| A. | Skin |
| B. | Intestine |
| C. | Kidney |
| D. | Liver |
| E. | Pancreas |
| Answer» E. Pancreas | |
| 1760. |
______ are comparatively poor conductors of heat. |
| A. | Cu and Al |
| B. | Cu and Fe |
| C. | Au and Ag |
| D. | Pb and Hg |
| Answer» E. | |
| 1761. |
__________ gas is used for gas welding. |
| A. | Ethane |
| B. | Methane |
| C. | Helium |
| D. | Acetylene |
| Answer» E. | |
| 1762. |
Combustible substance obtained from decaying organic matter is ______. |
| A. | Hydrogen |
| B. | Petroleum |
| C. | Both A and B |
| D. | Carbon |
| Answer» C. Both A and B | |
| 1763. |
An organic compound exhibits the [M]+, [M+2]+ and [M+4]+ peaks in the intensity ratio 1: 2: 1 in the mass spectrum, and shows a singlet at δ 7.49 in the 1H NMR spectrum in CDCl3 . The compound is: |
| A. | 1,4-dichlorobenzene |
| B. | 1,4-dibromobenzene |
| C. | 1,2-dibromobenzene |
| D. | 1,2-dichlorobenzene |
| Answer» C. 1,2-dibromobenzene | |
| 1764. |
__________ turns the blue litmus paper into red. |
| A. | Acid |
| B. | Neutral Acid |
| C. | Alkali |
| D. | Salts |
| Answer» B. Neutral Acid | |
| 1765. |
Lucas reagent is |
| A. | Anhydrous CuCl2 / HCl |
| B. | Anhydrous ZnCl2 / HCl |
| C. | Anhydrous CuCl2 / H2SO4 |
| D. | Anhydrous ZnCl2 / H2SO4 |
| Answer» C. Anhydrous CuCl2 / H2SO4 | |
| 1766. |
Identify the use of the isotope of uranium. |
| A. | Treatment of cancer |
| B. | Fuel in airplanes |
| C. | Treatment of goiter |
| D. | Fuel in nuclear reactors |
| Answer» E. | |
| 1767. |
According to ________, the properties of elements are a periodic function of their atomic masses. |
| A. | Newton’s Law |
| B. | Mendeleev’s Periodic Law |
| C. | Dobereiner’s Law of Triads |
| D. | Newlands Law of Octaves |
| Answer» C. Dobereiner’s Law of Triads | |
| 1768. |
If Ksp of Ag2CO3 is 8 × 10-12, the molar solubility of Ag2CO3 in 0.1M AgNO3 is |
| A. | 8 × 10-12 M |
| B. | 8 × 10-13 M |
| C. | 8 × 10-10 M |
| D. | 8 × 10-11 M |
| Answer» D. 8 × 10-11 M | |
| 1769. |
A Metal that burns with a bright white light on heating to its ignition temperature is |
| A. | Sodium |
| B. | Potassium |
| C. | Calcium |
| D. | Magnesium |
| Answer» E. | |
| 1770. |
Adding which substance gives green colour to glass? |
| A. | Calcium oxide |
| B. | Iron oxide |
| C. | Chromium oxide |
| D. | Manganese oxide |
| Answer» D. Manganese oxide | |
| 1771. |
A sample of oxygen contains two isotopes of oxygen with masses 16 u and 18 u respectively. The proportion of these isotopes in the sample is 3 : 1. What will be the average atomic mass of oxygen in this sample? |
| A. | 17.5 u |
| B. | 17 u |
| C. | 16 u |
| D. | 16.5 u |
| Answer» E. | |
| 1772. |
From the list of metals furnished here under, the number of metals which can react with both acids and bases isa) Aluminiumb) Zincc) Berylliumd) Irone) Calcium |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 1773. |
An atom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon? |
| A. | 12 |
| B. | 6 |
| C. | 10 |
| D. | 14 |
| Answer» C. 10 | |
| 1774. |
Freshly formed silver chloride precipitate can be converted into a colloidal solution by the addition of a suitable electrolyte. This is called |
| A. | Peptization |
| B. | Evaporation |
| C. | Electrical dispersion |
| D. | Condensation |
| Answer» D. Condensation | |
| 1775. |
\(\begin{array}{*{20}{c}} {A\mathop \to \limits^{4\;KOH.{O_2}} 2B + 2{H_2}O}\\ {\left( {Green} \right)}\\ {3{\rm{B}}\mathop \to \limits^{{\rm{\;}}4{\rm{\;HCl\;}}} 2{\rm{C}} + {\rm{Mn}}{{\rm{O}}_2} + 2{{\rm{H}}_2}{\rm{O}}}\\ {\left( {Purple} \right)}\\ {2{\rm{C}}\mathop \to \limits^{{{\rm{H}}_2}{\rm{O}},{\rm{\;KI\;}}} 2{\rm{A}} + 2{\rm{KOH}} + {\rm{D}}} \end{array}\)In the above sequence of reactions, A and D respectively, are |
| A. | KI and KMnO4 |
| B. | MnO2 and KIO3 |
| C. | KI and K2 MnO4 |
| D. | KIO3 and MnO2 |
| Answer» C. KI and K2 MnO4 | |
| 1776. |
Glaciers are formed by_______ |
| A. | Melting snow |
| B. | Accumulation of snow |
| C. | Heavy hail fall |
| D. | High rainfall |
| Answer» C. Heavy hail fall | |
| 1777. |
In the reaction 2 Na + Cl2 → 2NaCl. The number of electrons release by 46 g of Na is- |
| A. | 1.024 × 1024 |
| B. | 6.023 × 1023 |
| C. | 1.204 × 1024 |
| D. | 3.01 × 1023 |
| Answer» D. 3.01 × 1023 | |
| 1778. |
Noradrenaline is a/an: |
| A. | Antacid |
| B. | Neurotransmitter |
| C. | Antidepressant |
| D. | Antihistamine |
| Answer» C. Antidepressant | |
| 1779. |
Husk from wheat grains is separated from heavier seeds of grain by the process of- |
| A. | Winnowing |
| B. | Congulation |
| C. | Sublimation |
| D. | Filtration |
| Answer» B. Congulation | |
| 1780. |
Freezing point of a 4% aqueous solution of X is equal to freezing point of 12% aqueous solution Y. If molecular weight of X is A, then molecular weight of Y is |
| A. | 4A |
| B. | 2A |
| C. | 3A |
| D. | A |
| Answer» D. A | |
| 1781. |
Match List-I with List-II and select the correct answer using the code given below the lists:List - I(Name)List - II(Formula)A. Bleaching powder1. NaHCO3B. Baking soda2. Na2CO3. 10H2OC. Washing soda3. Ca(OH)2D. Slaked lime4. CaOCl2Code: |
| A. | A-4, B-1, C-2, D-3 |
| B. | A-4, B-2, C-1, D-3 |
| C. | A-3, B-2, C-1, D-4 |
| D. | A-3, B-1, C-2, D-4 |
| Answer» B. A-4, B-2, C-1, D-3 | |
| 1782. |
Identify the Incorrect statement among the following regarding Brownian movement. |
| A. | It is observed up to particle size of 0.5 microns |
| B. | Depends upon temperature |
| C. | It is the kinetic property of sol |
| D. | It is independent of wave length of light used |
| Answer» E. | |
| 1783. |
Aqua regia is also known as royal water or king's water which can dissolve noble metals gold and platinum is a mixture of:(a) Hydrochloric acid (b) Hydrobromic acid (c) Nitric acid (d) Sulphuric acid |
| A. | (a) and (b) |
| B. | (b) and (c) |
| C. | (a) and (c) |
| D. | (a) and (d) |
| Answer» D. (a) and (d) | |
| 1784. |
Choose which one is NOT true for base? |
| A. | Tums red litmus blue |
| B. | Bitter in taste |
| C. | Reacts with metals and bicarbonates to produce H,0, CO, and salt. |
| D. | Furnishes OH’ in aqueous medium/molten state |
| Answer» D. Furnishes OH’ in aqueous medium/molten state | |
| 1785. |
An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in kJ is: |
| A. | -9.0 |
| B. | +10.0 |
| C. | -0.9 |
| D. | -2.0 |
| Answer» D. -2.0 | |
| 1786. |
Main constituent of Natural gas is _______? |
| A. | Butane |
| B. | Methane |
| C. | Ethane |
| D. | Propane |
| Answer» C. Ethane | |
| 1787. |
A traditional 'battery' contains which of the following chemicals? |
| A. | Ethylene glycol |
| B. | Sulfuric acid |
| C. | Sodium bicarbonate |
| D. | Ethanol |
| Answer» C. Sodium bicarbonate | |
| 1788. |
_______ is obtained by evaporation of seawater. |
| A. | Sugar |
| B. | Iron |
| C. | Salt |
| D. | Steel |
| Answer» D. Steel | |
| 1789. |
Atomic Number is denoted by which alphabet? |
| A. | A |
| B. | N |
| C. | Z |
| D. | E |
| Answer» D. E | |
| 1790. |
Peptization is a: |
| A. | Process of bringing colloidal molecule into solution |
| B. | Process of converting precipitate into colloidal solution |
| C. | Process of converting a colloidal solution into precipitate |
| D. | Process of converting soluble particles to form colloidal solution. |
| Answer» C. Process of converting a colloidal solution into precipitate | |
| 1791. |
How is carbon black obtained? |
| A. | By heating wood at high temperature in absence of air. |
| B. | By heating coal at high temperature in absence of air |
| C. | By burning hydrocarbons in a limited supply of air |
| D. | By heating coal at high temperature in presence of air |
| Answer» D. By heating coal at high temperature in presence of air | |
| 1792. |
In a water molecule, the ratio of the mass of Hydrogen to the mass of Oxygen is always ________. |
| A. | 7:1 |
| B. | 8:1 |
| C. | 1:7 |
| D. | 1:8 |
| Answer» E. | |
| 1793. |
Match List-I with List-II and select the correct answer using the code given below the Lists:List I(Element)List II(Use)A. Li1. Timekeeper in atomic clocksB. Na 2. BatteriesC. K3. Transfer of nerve impulsesD. Cs4. Control of the water content in the blood |
| A. | A - 2, B - 3, C - 4, D - 1 |
| B. | A - 1, B - 2, C - 3, D - 4 |
| C. | A - 2, B - 4, C - 3, D - 1 |
| D. | A - 1, B - 3, C - 2, D - 4 |
| Answer» D. A - 1, B - 3, C - 2, D - 4 | |
| 1794. |
In a group, the number of connective electrons is ______. |
| A. | Increases |
| B. | Stays the same |
| C. | Decreases |
| D. | Cannot be determined |
| Answer» C. Decreases | |
| 1795. |
If the pH value of a salt is 14, then it is a salt of _______ |
| A. | strong acid and strong base |
| B. | weak acid and weak base |
| C. | weak acid and strong base |
| D. | strong acid and weak base |
| Answer» D. strong acid and weak base | |
| 1796. |
_______ is the primary acid present in ripe bananas. |
| A. | Hydrochloric Acid |
| B. | Malic Acid |
| C. | Formic Acid |
| D. | Sulphuric Acid |
| Answer» C. Formic Acid | |
| 1797. |
Cinnabar is an ore of? |
| A. | Iron |
| B. | Lead |
| C. | Silver |
| D. | Copper |
| E. | Mercury |
| Answer» F. | |
| 1798. |
Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, x is the mass of the gas adsorbed on mass m of the adsorbent at pressure p. \(\frac{x}{m}\) is proportional to |
| A. | \({\rm{\;}}{{\rm{P}}^{\frac{1}{4}}}\) |
| B. | P2 |
| C. | P |
| D. | \({{\rm{P}}^{\frac{1}{2}}}\) |
| Answer» E. | |
| 1799. |
An iron nail is dipped into a solution of copper sulphate for 1 hour. Find out the correct statement regarding this experiment. |
| A. | All of these |
| B. | The colour of the solution changes from blue to green colour only. |
| C. | The green colour is due to the formation of ferrous sulphate only. |
| D. | A reddish brown layer of copper deposited in the nail only |
| Answer» B. The colour of the solution changes from blue to green colour only. | |
| 1800. |
Chemical name of baking soda is |
| A. | calcium phosphate |
| B. | sodium chloride |
| C. | baker’s yeast |
| D. | sodium bicarbonate |
| Answer» E. | |