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.
| 1801. |
Milk of Magnesia is used as a ________. |
| A. | Laxative |
| B. | Pain killer |
| C. | Sedative |
| D. | Antibiotic |
| Answer» B. Pain killer | |
| 1802. |
Isotopes of an element do not have ________. |
| A. | Same number of electrons |
| B. | Same physical properties |
| C. | Same chemical properties |
| D. | Same number of protons |
| Answer» C. Same chemical properties | |
| 1803. |
Increasing order of reactivity of the following compounds for SN1 substitution is:(1) (2) (3) (4) |
| A. | (2) < (3) < (4) < (1) |
| B. | (2) < (3) < (1) < (4) |
| C. | (2) < (1) < (4) < (3) |
| D. | (1) < (2) < (4) < (3) |
| Answer» D. (1) < (2) < (4) < (3) | |
| 1804. |
If the electronic configuration of element A’ and B’ are 1s2, 2s22p6, 3s1 and 1s2,2s22p6,3s2, 3p4 respectively, then the formula of the compound formed by the combination of these elements will be: |
| A. | AB3 |
| B. | A2B |
| C. | AB |
| D. | AB2 |
| Answer» C. AB | |
| 1805. |
Electropositive atoms tend to form _________. |
| A. | Negative ions |
| B. | Positive ions |
| C. | Covalent bonds |
| D. | Metallic bonds |
| Answer» C. Covalent bonds | |
| 1806. |
An element has an atomic number of N. The number of protons in the nucleus of its atom is: |
| A. | N |
| B. | W + N |
| C. | W |
| D. | W – N |
| Answer» B. W + N | |
| 1807. |
Most stable oxidation state for chromium is: |
| A. | +2 |
| B. | +6 |
| C. | +4 |
| D. | +3 |
| Answer» E. | |
| 1808. |
Metals generally form ________. |
| A. | Basic oxides |
| B. | Acidic oxides |
| C. | Neutral oxides |
| D. | Both basic and acidic oxides |
| Answer» B. Acidic oxides | |
| 1809. |
From cotton to production of bedsheet and from wax to production of light are |
| A. | both physical and chemical changes simultaneously |
| B. | both physical changes |
| C. | both chemical changes |
| D. | physical change and chemical change respectively |
| Answer» E. | |
| 1810. |
During setting of plaster of Paris- |
| A. | Mass is expanded |
| B. | Both mass is expanded and heat is liberated |
| C. | Heat is liberated |
| D. | Combustion takes place |
| Answer» C. Heat is liberated | |
| 1811. |
On heating ethanol with concentrated H2SO4 at 443 K gives ________. |
| A. | Ethane |
| B. | Ethene |
| C. | Ethyne |
| D. | Methane |
| Answer» C. Ethyne | |
| 1812. |
Melanin is a ______ that protects the eyes from ultraviolet light. |
| A. | pigment |
| B. | Mineral |
| C. | Vitamin |
| D. | Glycerol |
| Answer» B. Mineral | |
| 1813. |
How many oxygen atoms are there in an acetone molecule? |
| A. | 3 |
| B. | 1 |
| C. | 2 |
| D. | 4 |
| Answer» C. 2 | |
| 1814. |
How much amount of urea will be required for supplying 1 kg of nitrogen? |
| A. | 2.0 kg |
| B. | 2.2 kg |
| C. | 2.5 kg |
| D. | 2.7 kg |
| Answer» C. 2.5 kg | |
| 1815. |
Benzoic acid on reacting with lithium aluminium hydride gives |
| A. | Benzene |
| B. | Benzyl alcohol |
| C. | Toluene |
| D. | None of the above |
| Answer» C. Toluene | |
| 1816. |
______ is the inflammatory compound in pepper spray. |
| A. | curcumin |
| B. | gingerol |
| C. | quercetin |
| D. | capsaicin |
| Answer» E. | |
| 1817. |
______________ is a group of silicate minerals that have perfect cleavage, so that they split easily into thin plates. |
| A. | Gypsum |
| B. | Quartz |
| C. | Mica |
| D. | Feldspar |
| Answer» D. Feldspar | |
| 1818. |
In science, which of the following is the property of a mixture? |
| A. | The constituents of a mixture retain their physical properties |
| B. | It have fixed melting and boiling point |
| C. | It cannot be separated by physical methods |
| D. | Its composition is fixed |
| Answer» B. It have fixed melting and boiling point | |
| 1819. |
Increase of the temperature increase the rate of reaction because |
| A. | due to increased no. of fruitful collisions |
| B. | due to increase in the no. of activated molecules |
| C. | Both a & b |
| D. | None |
| Answer» B. due to increase in the no. of activated molecules | |
| 1820. |
For coagulation of arsenious sulphide sol, which one of the following salt solutions will be most effective? |
| A. | BaCl2 |
| B. | AlCl3 |
| C. | Na3PO4 |
| D. | NaCl |
| Answer» C. Na3PO4 | |
| 1821. |
_____ is the heat per unit mass required to change a substance from solid into liquid at the same temperature and pressure. |
| A. | Vaporisation |
| B. | Latent heat of fusion |
| C. | Regelation |
| D. | Sublimation |
| Answer» C. Regelation | |
| 1822. |
Potato chips are packed in plastic bags in the atmosphere of |
| A. | Nitrogen Atmosphere |
| B. | Hydrogen Atmosphere |
| C. | Oxygen Atmosphere |
| D. | Iodine Atmosphere |
| Answer» B. Hydrogen Atmosphere | |
| 1823. |
_______ is displaced when zinc is added to the solution of copper sulphate. |
| A. | Copper |
| B. | Hydrogen |
| C. | Zinc |
| D. | Sulphate |
| Answer» B. Hydrogen | |
| 1824. |
Electric bulbs are usually filled with chemically-inactive gases like ________. |
| A. | hydrogen |
| B. | oxygen |
| C. | nitrogen |
| D. | chlorine |
| Answer» D. chlorine | |
| 1825. |
A metal which is a poor conductor of heat is _____. |
| A. | Lead |
| B. | Gold |
| C. | Zinc |
| D. | Iron |
| Answer» B. Gold | |
| 1826. |
_______ is the property of attracting electrons by the halogen atoms in a molecule. |
| A. | Electron affinity |
| B. | Electropositivity |
| C. | Electrochemistry |
| D. | Electronegativity |
| Answer» E. | |
| 1827. |
If D0 is the frequency factor, E is the activation energy, T is the temperature and K is Boltzmann constant, then the diffusivity determined over a range of diffusion temperature can be expressed as |
| A. | D0 exp (-E/kt) |
| B. | D0 exp (-kT/E) |
| C. | \(\frac{{kT}}{q}\exp \left( {{D_0}/E} \right)\) |
| D. | D0 exp (kT/q) |
| Answer» B. D0 exp (-kT/E) | |
| 1828. |
A electric bulb has a filament made of _________. |
| A. | Iron |
| B. | Lead |
| C. | Copper |
| D. | Tungsten |
| E. | Nickel |
| Answer» E. Nickel | |
| 1829. |
As per the modern periodic law, the physical and chemical properties of elements are periodic functions of their- |
| A. | Atomic number |
| B. | Electronic configuration |
| C. | Atomic weight |
| D. | Atomic size |
| Answer» B. Electronic configuration | |
| 1830. |
Molecules of which of the following have cage-like structure?1. Diamond2. Graphite3. FullerenesSelect the correct answer using the code given below: |
| A. | 1, 2 and 3 |
| B. | 2 and 3 only |
| C. | 2 only |
| D. | 3 only |
| Answer» E. | |
| 1831. |
________is an anaesthetic agent. |
| A. | Acetylene |
| B. | Glycol |
| C. | Diethyl ether |
| D. | Ethylene |
| Answer» D. Ethylene | |
| 1832. |
Hydrogenation of vegetable oils using nickel catalyst is an example of |
| A. | Substitution reaction |
| B. | Elimination reaction |
| C. | Addition reaction |
| D. | Free-radical polymerization |
| Answer» D. Free-radical polymerization | |
| 1833. |
______ solids are formed by the three-dimensional arrangements of cations and anions bound by strong coulombic (electrostatic) forces. |
| A. | Covalent |
| B. | Ionic |
| C. | Metallic |
| D. | Molecular |
| Answer» C. Metallic | |
| 1834. |
Phosphorus and nitrogen are examples of which type of impurities in sewage? |
| A. | Organic |
| B. | Inorganic |
| C. | Nutrients |
| D. | None of these |
| Answer» D. None of these | |
| 1835. |
Consider the statements S1 and S2:S1: Conductivity always increases with decrease in the concentration with decrease in the concentration of electrolyte.S2: Molar conductivity always increases with decrease in the concentration of electrolyte.The correct option among the following is; |
| A. | Both S1 and S2 are wrong |
| B. | S1 is wrong and S2 is correct |
| C. | Both S1 and S2 are correct |
| D. | S1 is correct and S2 is wrong |
| Answer» C. Both S1 and S2 are correct | |
| 1836. |
Consider the following statements regarding matter.1. Matter is made up of small particles2. The forces of attraction between the particles in matter are maximum in gases.3. Evaporation does not cause cooling.4. The matter around us exists in three states: solid, liquid and gas,Which of the statements given above is/are correct? |
| A. | 1 only |
| B. | 3 and 4 |
| C. | 2 and 4 |
| D. | 1 and 4 |
| Answer» E. | |
| 1837. |
Elements having same atomic numbers but a different mass number are called ______. |
| A. | isotones |
| B. | isotopes |
| C. | isobar |
| D. | None of the above |
| Answer» C. isobar | |
| 1838. |
Radon is |
| A. | an inert gas |
| B. | an artificial fibre |
| C. | an explosive |
| D. | a metal |
| Answer» B. an artificial fibre | |
| 1839. |
Choose the best fire extinguisher : |
| A. | Oxygen |
| B. | Water |
| C. | Carbon dioxide |
| D. | Blanket |
| Answer» D. Blanket | |
| 1840. |
Bronze is an alloy of ________. |
| A. | Zinc and iron |
| B. | Copper and tin |
| C. | Tin and zinc |
| D. | Iron and mercury |
| Answer» C. Tin and zinc | |
| 1841. |
Oxides of non-metals are ________ in nature. |
| A. | Basic |
| B. | Both acidic and basic |
| C. | Amphoteric |
| D. | Acidic |
| Answer» E. | |
| 1842. |
match the following:List - IList - IIi. Ore of Al (Aluminum)a. Magnetiteii. Ore of Fe (Iron)b. Bauxiteiii. Ore of Cu (Copper)c. Philosopher's wooliv. Ore of Zn (Zinc)d. Malachite |
| A. | i - c, ii - b, iii - a, iv - d |
| B. | i - b, ii - a, iii - d, iv - c |
| C. | i - c, ii - b, iii - c, iv - a |
| D. | i - b, ii - c, iii - d, iv - a |
| Answer» C. i - c, ii - b, iii - c, iv - a | |
| 1843. |
______is the most ductile metal. |
| A. | Ag |
| B. | Ph |
| C. | Au |
| D. | C |
| Answer» D. C | |
| 1844. |
Faraday's law of electrolysis is related to ______? |
| A. | Equivalent weight of the electrolyte |
| B. | Atomic number of anion |
| C. | Speed of the cation |
| D. | Atomic number of cation |
| Answer» B. Atomic number of anion | |
| 1845. |
Nitrous oxide is a colourless and odourless substance that is also known as ______. |
| A. | Laughing gas |
| B. | Sleeping gas |
| C. | Balloon gas |
| D. | Tear gas |
| Answer» B. Sleeping gas | |
| 1846. |
Molar volume is equal to |
| A. | 22.41 L at NTP |
| B. | 2.241 L at NTP |
| C. | 29.27 L at NTP |
| D. | 1.03 L at NTP |
| Answer» B. 2.241 L at NTP | |
| 1847. |
_______ are stable, negatively charged particles found in all atoms. |
| A. | Photons |
| B. | Electrons |
| C. | Protons |
| D. | Neutrons |
| Answer» C. Protons | |
| 1848. |
If the molecular formulas of ethane, hydrogen chloride, and glucose are C2 H6, HCI, and C6 H12 O6 respectively, what will be their respective empirical formulas? |
| A. | CH3, HCI and CH2O |
| B. | C2H6, HCI and C6 H12 O6 |
| C. | 2CH3, HCI and 6 CH2O |
| D. | CH, HCI and CHO |
| Answer» B. C2H6, HCI and C6 H12 O6 | |
| 1849. |
Adjusted Sodium Adsorption Ratio (SAR) of normal water is _____. |
| A. | 10 - 20 |
| B. | 30 - 40 |
| C. | > 10 |
| D. | < 10 |
| Answer» E. | |
| 1850. |
Baking soda, the common cooking ingredient, has which of the following chemical name? |
| A. | Sodium bicarbonate |
| B. | Sodium chloride |
| C. | Monosodium glutama |
| D. | Sodium benzoate |
| Answer» B. Sodium chloride | |