MCQOPTIONS
Saved Bookmarks
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.
| 1451. |
_______ is the most abundant metal on the earth. |
| A. | Copper |
| B. | Aluminium |
| C. | Zinc |
| D. | Lead |
| Answer» C. Zinc | |
| 1452. |
Magnesium has an atomic number as 12. Find out its valency. |
| A. | +2 |
| B. | -3 |
| C. | -2 |
| D. | +3 |
| Answer» B. -3 | |
| 1453. |
Give the general electronic configuration valence shell of 'd' block elements |
| A. | \(n{d^{1 - 10}}\left( {n - 1} \right){s^{1 - 2}}\) |
| B. | \(\left( {n - 1} \right){d^{1 - 10}}n{s^{1 - 2}}\) |
| C. | \(\left( {n - 1} \right){d^{1 - 5}}n{s^2}\) |
| D. | \(\left( {n - 1} \right){d^{10}}n{s^2}\) |
| Answer» C. \(\left( {n - 1} \right){d^{1 - 5}}n{s^2}\) | |
| 1454. |
Match List - I with List - II and select the correct answer from the codes given below the lists : List – I (Substance) List – II (Use) A. Blue Vitriol 1. Artificial rain B. Eosin 2. Fungicide C. Silver iodide 3. Red ink D. Zinc phosphide 4. Rodenticide |
| A. | 2, B) 3, C) 4, D) 1 |
| B. | 2, B) 1, C) 3, D) 4 |
| C. | 2, B) 3, C) 1, D) 4 |
| D. | 2, B) 4, C) 1, D) 3 |
| Answer» D. 2, B) 4, C) 1, D) 3 | |
| 1455. |
If dilute sulfuric acid is added to granular zinc, which of the following gases will form? |
| A. | Sulphur dioxide |
| B. | Oxygen |
| C. | Hydrogen sulfide |
| D. | Hydrogen |
| Answer» E. | |
| 1456. |
Oxygen molecule is ________. |
| A. | Monoatomic |
| B. | Diatomic |
| C. | Triatomic |
| D. | Polyatomic |
| Answer» C. Triatomic | |
| 1457. |
Iodine reacts with concentrated HNO3 to yield Y along with other products. The oxidation state of iodine in Y, is |
| A. | 1 |
| B. | 3 |
| C. | 7 |
| D. | 5 |
| Answer» E. | |
| 1458. |
Of the following substances, the one that cannot be used as an insecticide is? |
| A. | Gammexane |
| B. | Bleaching powder |
| C. | DDT |
| D. | Malathion |
| Answer» C. DDT | |
| 1459. |
In which of the following is MgCl2 soluble? |
| A. | Petrol |
| B. | Acetone |
| C. | Kerosene |
| D. | Water |
| Answer» E. | |
| 1460. |
Mendeleev left the gaps for the elements with predicted atomic weight 68 & 72 respectively are discovered later as - Identify |
| A. | Eka aluminium & Eka Silicon |
| B. | Aluminium & Silicon |
| C. | Scandium & Germanium |
| D. | Gallium & Germanium |
| Answer» E. | |
| 1461. |
Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following CORRECTLY represents the type of reaction involved? |
| A. | Oxidation reaction |
| B. | Precipitation reaction |
| C. | Combination reaction |
| D. | Combustion reaction |
| Answer» C. Combination reaction | |
| 1462. |
For a reaction scheme \({\rm{A}}\mathop \to \limits^{{\rm{\;}}{{\rm{K}}_1}{\rm{\;}}} {\rm{B}}\mathop \to \limits^{{\rm{\;}}{{\rm{K}}_2}{\rm{\;}}} {\rm{C}}\), if the rate of formation of B is set to be zero then the concentration of B is given by: |
| A. | (k1 – k2)[A] |
| B. | (k1 k2) [A] |
| C. | (k1 k2) [A] |
| D. | \(\frac{{{k_1}}}{{{k_2}}}{\rm{\;}}\left[ A \right]\) |
| Answer» E. | |
| 1463. |
An element has an atomic number 15. With which of the following elements will it show similar chemical properties? |
| A. | N(7) |
| B. | Be(4) |
| C. | O(8) |
| D. | Ne(10) |
| Answer» B. Be(4) | |
| 1464. |
Element Hafnium of the Hf symbol is named at which of the following places.A. GermanyB. CopenhagenC. SwedenD. France |
| A. | C |
| B. | D |
| C. | B |
| D. | A |
| Answer» D. A | |
| 1465. |
‘Alum’ is an example of: |
| A. | Flake salt |
| B. | Table salt |
| C. | Single salt |
| D. | Double salt |
| Answer» E. | |
| 1466. |
Aluminium, Iron, Copper and Zinc are extracted from |
| A. | Bauxite, Magnetite, Malachite and Calamine respectively |
| B. | Magnetite, Bauxite, Malachite and Calamine respectively |
| C. | Calamine, Malachite, Magnetic and Bauxite respectively |
| D. | Malachite, Magnetite, Bauxite and Calamine respectively |
| Answer» B. Magnetite, Bauxite, Malachite and Calamine respectively | |
| 1467. |
______ is used in the manufacture of borax. |
| A. | washing soda |
| B. | baking soda |
| C. | brine |
| D. | baking power |
| Answer» B. baking soda | |
| 1468. |
Match the following items of column (A) with column (B).Column AColumn BI. Electron1. GoldsteinII. Proton2. ThomsonIII. Neutron 3. James Chadwick |
| A. | I - 3, II - 1, III - 2 |
| B. | I - 2, II - 1, III - 3 |
| C. | I - 2, II - 3, III - 1 |
| D. | I - 1, II - 2, III - 3 |
| Answer» C. I - 2, II - 3, III - 1 | |
| 1469. |
In chromatography, which of the following statements is INCORRECT for Rf? |
| A. | Rf value depends on the type of chromatography. |
| B. | The value of Rf cannot be more than one. |
| C. | Higher Rf value means higher adsorption. |
| D. | Rf value is dependent on the mobile phase. |
| Answer» D. Rf value is dependent on the mobile phase. | |
| 1470. |
An amalgam of metal has which another element? |
| A. | C |
| B. | Au |
| C. | Ag |
| D. | Hg |
| Answer» E. | |
| 1471. |
Pasteurized milk can be consumed without boiling as it is free from harmful microbes. During the process, milk is heated to about______. |
| A. | 100°C for 1 to 3 minutes |
| B. | 70°C for 15 to 30 seconds |
| C. | 50°C for 5 to 10 seconds |
| D. | 90°C for 15 to 30 minutes |
| Answer» C. 50°C for 5 to 10 seconds | |
| 1472. |
Acid Rain has pH value ofA. 5.5 or lessB. 12.5 or moreC. 10.5 or moreD. 8.5 or more |
| A. | A |
| B. | D |
| C. | B |
| D. | C |
| Answer» B. D | |
| 1473. |
During a chemical reaction, atomic number _________. |
| A. | Changes with volume |
| B. | Remains the same |
| C. | Changes |
| D. | Changes with temperature |
| Answer» C. Changes | |
| 1474. |
A mixture is formed as a result of- |
| A. | Physical change |
| B. | Chemical change |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» B. Chemical change | |
| 1475. |
Pasteurization is related to |
| A. | sterilization of milk |
| B. | dehydration of milk |
| C. | fermentation of milk |
| D. | distillation of milk |
| Answer» B. dehydration of milk | |
| 1476. |
Curd contains mainly ____ acid. |
| A. | Benzoic |
| B. | Fumaric |
| C. | Lactic |
| D. | Malic |
| Answer» D. Malic | |
| 1477. |
After some days, statues of brass and bronze become green due to: |
| A. | oxidation |
| B. | corrosion |
| C. | erosion |
| D. | decomposition |
| Answer» C. erosion | |
| 1478. |
Aluminium oxide contains 52.9% aluminium and carbon dioxide 27.2% carbon. Assuming that the law of Reciprocal proportion is true, the percentage of aluminium in aluminium carbide will be |
| A. | 1.123% |
| B. | 0.375% |
| C. | 74.97% |
| D. | None of these |
| Answer» D. None of these | |
| 1479. |
Name the Group in the Modern Periodic Table which has elements that are all gases. |
| A. | Group 18 |
| B. | Group 10 |
| C. | Group 12 |
| D. | Group 14 |
| Answer» B. Group 10 | |
| 1480. |
Corundum is an ore of: |
| A. | iron |
| B. | aluminium |
| C. | copper |
| D. | silver |
| Answer» C. copper | |
| 1481. |
Graphite and diamonds are__________. |
| A. | isotopes |
| B. | isomers |
| C. | isotones |
| D. | allotropes |
| Answer» E. | |
| 1482. |
Fe + CuSO4 → FeSO4 + CuThe given reaction is an example of __________. |
| A. | Displacement Reaction |
| B. | Combustion reaction |
| C. | Dissolution reaction |
| D. | Coupling reaction |
| Answer» B. Combustion reaction | |
| 1483. |
During filtration process, the particles which remain on filter paper is called |
| A. | solvent |
| B. | residue |
| C. | filtrate |
| D. | solute |
| Answer» C. filtrate | |
| 1484. |
Association of molecules in water is due to- |
| A. | Covalent bonding |
| B. | Hydrogen bonding |
| C. | Ionic bonding |
| D. | Vander Wasls forces |
| Answer» C. Ionic bonding | |
| 1485. |
Arrange the following molecules in the increasing order of their bond angles.NH3 - (I), H2O - (II), BF3 - (III), BeCl2 - (IV) |
| A. | I < III < IV < II |
| B. | II < IV < I < III |
| C. | IV < I < II < III |
| D. | II < I < III < IV |
| Answer» E. | |
| 1486. |
Choose the incorrect pair from the below. |
| A. | pH of human blood – 7.4 |
| B. | pH of caustic soda – 5.0 |
| C. | pH of lemon juice – 2.2 |
| D. | pH of vinegar – 2.8 |
| Answer» C. pH of lemon juice – 2.2 | |
| 1487. |
Fill in the blank with the most appropriate option.Quicklime reacts with water to form ______. |
| A. | limestone |
| B. | slaked lime |
| C. | chloride of lime |
| D. | chalk powder |
| Answer» C. chloride of lime | |
| 1488. |
Milk of magnesia is used as: |
| A. | Dye in textile industry |
| B. | Artificial sweetener |
| C. | Fertilizer |
| D. | Antacid |
| Answer» E. | |
| 1489. |
Name the element that must be present in a compound to classify it as an organic compound. |
| A. | Iron |
| B. | Ammonia |
| C. | Zinc |
| D. | Carbon |
| Answer» E. | |
| 1490. |
As we move down a group of the periodic table, the electron affinity- |
| A. | Increases and then decreases |
| B. | Remains the same |
| C. | Decreases |
| D. | Increases |
| Answer» D. Increases | |
| 1491. |
A hydrocarbon in which two carbon atoms are joined by a double bond is called as an: |
| A. | Alkane |
| B. | Alkene |
| C. | Alkyne |
| D. | Ionic bond |
| E. | None of the above / More than one above |
| Answer» C. Alkyne | |
| 1492. |
An ideal gas undergoes isothermal compression from 5 m3 to 1 m3 against a constant external pressure of 4 Nm-2. Heat released in this process is used to increase the temperature of 1 mole of Al. If molar heat capacity of Al is 24 J mol-1 K-1, the temperature of Al increases by |
| A. | \(\frac{3}{2}K\) |
| B. | 1K |
| C. | 2K |
| D. | \(\frac{2}{3}K\) |
| Answer» E. | |
| 1493. |
LPG in a domestic gas cylinder is stored in- A. Solid StateB. Gas StateC. Liquid StateD. Can be stored at any state |
| A. | B |
| B. | D |
| C. | A |
| D. | C |
| Answer» E. | |
| 1494. |
Nitrates, Phosphates, metals are examples of which type of impurities in sewage? |
| A. | Organic |
| B. | Inorganic |
| C. | Nutrients |
| D. | None of these |
| Answer» C. Nutrients | |
| 1495. |
For any given series of spectral lines of atomic hydrogen, let \(\Delta \bar v = {\bar v_{{\rm{max}}}} - {\rm{\;}}{\bar v_{{\rm{min}}}}\) be the difference in maximum and minimum frequencies in cm-1. The ratio \(\frac{{\Delta {{\bar v}_{Lyman}}}}{{\Delta {{\bar v}_{Balmer}}}}\) is: |
| A. | 4 : 1 |
| B. | 9 : 4 |
| C. | 5 : 4 |
| D. | 27 : 5 |
| Answer» C. 5 : 4 | |
| 1496. |
_____ is not an actinoid. |
| A. | Terbium |
| B. | Fermium |
| C. | Nobelium |
| D. | Thorium |
| Answer» B. Fermium | |
| 1497. |
Containers for keeping strong acids are made up of |
| A. | Platinum |
| B. | Brass |
| C. | Copper |
| D. | Lead |
| Answer» E. | |
| 1498. |
Among the following, the INCORRECT statement about colloids is: |
| A. | They can scatter light |
| B. | They are larger than many small molecules and have high molar mass |
| C. | The osmotic pressure of a colloidal solution is of higher order than the true solution at the same concentration |
| D. | The range of diameters of colloidal particles is between 1 and 1000 nm |
| Answer» D. The range of diameters of colloidal particles is between 1 and 1000 nm | |
| 1499. |
______ is NOT a compound. |
| A. | Hydrogen sulfide |
| B. | Chalk |
| C. | Sulphur dioxide |
| D. | Lead |
| Answer» E. | |
| 1500. |
Identify the Conjugate base of NH3 |
| A. | NH+4 |
| B. | N2H4 |
| C. | NH2OH |
| D. | NH-2 |
| Answer» E. | |