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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.
| 1051. |
Graphene is frequently in news recently. What is its importance?1. It is a two-dimensional material and has good electrical conductivity.2. It is one of the thinnest but strongest materials tested so far.3. It is entirely made of silicon and has high optical transparency.4. It can be used as 'conducting electrodes' required for touch screens, LCDs and organic LEDs.Which of the statements given above are correct? |
| A. | 1 and 2 only |
| B. | 3 and 4 only |
| C. | 1, 2 and 4 only |
| D. | 1, 2, 3 and 4 |
| Answer» D. 1, 2, 3 and 4 | |
| 1052. |
If the process is spontaneous than ΔG is : |
| A. | ΔG = 0 |
| B. | ΔG > 0 |
| C. | ΔG < 0 |
| D. | ΔG = ΔH |
| Answer» D. ΔG = ΔH | |
| 1053. |
IUPAC stands for |
| A. | International Union of Physics and Applied Chemistry |
| B. | International Union of Pure and Applied Chemistry |
| C. | International Unit of Pure and Applied Chemistry |
| D. | International Unit of Pure and Application Chemistry |
| Answer» C. International Unit of Pure and Applied Chemistry | |
| 1054. |
Consider the following steps of the Wastewater Treatment Plant (WWTP) –i. Impure water goes to grit and sand removal tank,ii. Impure water is allowed to settle in a large tank,iii. Impure water is passed through bar screens.Using the codes given below, arrange the above steps sequentially. |
| A. | iii, ii, i |
| B. | ii, i, iii |
| C. | i, ii, iii |
| D. | iii, i, ii |
| Answer» E. | |
| 1055. |
Polymer which is used in paints and synthesised by ethylene glycol and phthalic acid is |
| A. | Dacron |
| B. | Bakelite |
| C. | Polystyrene |
| D. | Glyptal |
| Answer» E. | |
| 1056. |
Modern periodic table is based on ________ . |
| A. | Atomic number |
| B. | Number of positrons |
| C. | Atomic mass number |
| D. | Number of neutrons |
| Answer» B. Number of positrons | |
| 1057. |
Permanent hardness of water cannot be removed by which one of the following methods? |
| A. | Treatment with washing soda |
| B. | Calgon’s method |
| C. | Boiling |
| D. | Ion exchange method |
| Answer» D. Ion exchange method | |
| 1058. |
Cement is widely used in the construction of buildings. It contains: |
| A. | Calcium silicate |
| B. | Calcium aluminate |
| C. | Calcium sulfoaluminate |
| D. | All of the above |
| Answer» E. | |
| 1059. |
Dalton’s theory was based on the laws of: |
| A. | Conservation of momentum |
| B. | Conservation of mass |
| C. | Chemical combination |
| D. | Constant proportion |
| Answer» C. Chemical combination | |
| 1060. |
How many Isomers does C6 H14 have ? |
| A. | 3 |
| B. | 6 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 1061. |
Multi-use plastic water bottles are made of ______.A. BakeliteB. PolystyreneC. PolyethyleneD. Silicon |
| A. | C |
| B. | B |
| C. | A |
| D. | D |
| Answer» B. B | |
| 1062. |
If the pH of a solution is 7, it is ________. |
| A. | Acidic |
| B. | Neutral |
| C. | Basic |
| D. | None of these |
| Answer» C. Basic | |
| 1063. |
A group of more than three atoms carrying a charge is known as _________ ion. |
| A. | Polyatomic |
| B. | Tri atomic |
| C. | Mono atomic |
| D. | Di atomic |
| Answer» B. Tri atomic | |
| 1064. |
Acids turn blue litmus paper into which colour? |
| A. | Green |
| B. | Red |
| C. | Pink |
| D. | Colourless |
| Answer» C. Pink | |
| 1065. |
_______ alloy consists of nickel, copper and zinc. |
| A. | Solder |
| B. | German silver |
| C. | Bell Metal |
| D. | Rose Metal |
| Answer» C. Bell Metal | |
| 1066. |
Among the following compounds, most basic amino acid is |
| A. | Serine |
| B. | Asparagine |
| C. | Lysine |
| D. | Histidine |
| Answer» D. Histidine | |
| 1067. |
Acidity in a person can be cured by consuming _______ |
| A. | baking soda solution |
| B. | vinegar solution |
| C. | lemon juice |
| D. | buttermilk |
| Answer» B. vinegar solution | |
| 1068. |
5 – 8% of acetic acid is called: |
| A. | glacial acetic acid |
| B. | vinegar |
| C. | ester |
| D. | ethanol |
| Answer» C. ester | |
| 1069. |
Fullerene consists of _______________ carbon atoms. |
| A. | 32 |
| B. | 48 |
| C. | 60 |
| D. | 4 |
| Answer» D. 4 | |
| 1070. |
Match List-I with List-II and select the correct answer using the code given below the Lists:List-I(Compound/Molecule)List-II(Shape of Molecule)A. CH3F1. Trigonal planarB. HCHO2. TetrahedralC. HCN3. Trigonal pyramidalD. NH34. Linear |
| A. | A-2, B-4, C-1, D-3 |
| B. | A-2, B-1, C-4, D-3 |
| C. | A-3, B-4, C-1, D-2 |
| D. | A-3, B-1, C-4, D-2 |
| Answer» C. A-3, B-4, C-1, D-2 | |
| 1071. |
_______ have similar chemical properties but different atomic masses. |
| A. | Isomers |
| B. | Isotopes |
| C. | Actinides |
| D. | Isobars |
| Answer» C. Actinides | |
| 1072. |
Non-metal oxides are usually: |
| A. | Acidic |
| B. | Basic |
| C. | Amphoteric |
| D. | Neutral |
| Answer» B. Basic | |
| 1073. |
Pb + CuCl2 → PbCl2 + Cu. The given reaction is an example of a ________ reaction. |
| A. | decomposition |
| B. | double displacement |
| C. | combination |
| D. | displacement |
| Answer» E. | |
| 1074. |
In a compound the elements are always present in definite proportions by _______. |
| A. | mass |
| B. | volume |
| C. | size |
| D. | No option is correct. |
| Answer» B. volume | |
| 1075. |
Calculate the effective nuclear charge felt by a 3d electron of chromium atom (z = 24). |
| A. | 3.90 |
| B. | 4.60 |
| C. | 3.55 |
| D. | 4.20 |
| Answer» C. 3.55 | |
| 1076. |
In order to oxidize a mixture of one mole of each of FeC2O4, Fe2 (C2O4)3, FeSO4 and Fe2(SO4)3 in acidic medium, the number of moles of KMnO4 required is: |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 1.5 |
| Answer» B. 1 | |
| 1077. |
A metal on combustion in excess air forms X. X upon hydrolysis with water yields H2O2 and O2 along with another product. The metal is |
| A. | Li |
| B. | Mg |
| C. | Rb |
| D. | Na |
| Answer» D. Na | |
| 1078. |
Consider the following statements regarding the 'Tyndall effect.1. It is a phenomenon wherein the scattering of a beam of light can be observed.2. It can be observed when a fine beam of light enters a room through a small hole.3. It can be observed when sunlight passes through the canopy of a dense forest.Which of the statements given above is/are correct? |
| A. | 1 only |
| B. | 3 only |
| C. | 2 only |
| D. | 1, 2 and 3 |
| Answer» E. | |
| 1079. |
1 atomic mass unit in kilogram will be equal to: |
| A. | 1.66 \(\times\) 10-27 kg |
| B. | 9.102 \(\times\) 10-19 kg |
| C. | 6.023 \(\times\) 10-23 kg |
| D. | 6.626 \(\times\)10-34 kg |
| Answer» B. 9.102 \(\times\) 10-19 kg | |
| 1080. |
pH scale ranges from ________. |
| A. | 1 to 14 |
| B. | 1 to 7 |
| C. | 0 to 14 |
| D. | 0 to 7 |
| Answer» D. 0 to 7 | |
| 1081. |
Cathode rays have ______. |
| A. | Mass only |
| B. | Charge only |
| C. | Both mass and charge |
| D. | Neither mass nor charge |
| Answer» D. Neither mass nor charge | |
| 1082. |
Group Number 18 of Modern Periodic table contains which of the following elements? |
| A. | Metals |
| B. | Noble gases |
| C. | Metalloids |
| D. | Non-metals |
| Answer» C. Metalloids | |
| 1083. |
In Newland’s table, the elements ________ were placed with the halogens. |
| A. | Ce and La |
| B. | Fe and Se |
| C. | Co and Ni |
| D. | Mn and As |
| Answer» D. Mn and As | |
| 1084. |
According to Dalton's atomic theory, an atom- |
| A. | Can be further subdivide |
| B. | Can not be subdivided |
| C. | Contains neutrons, protons and electrons |
| D. | None of these |
| Answer» C. Contains neutrons, protons and electrons | |
| 1085. |
In the following reaction; x → AyB \({\rm{lo}}{{\rm{g}}_{10}}\left[ {\frac{{ - d\left[ A \right]}}{{dt}}{\rm{\;}}} \right] = {\rm{lo}}{{\rm{g}}_{10}}\left[ {\frac{{d\left[ B \right]}}{{dt}}} \right] + 0.3010\)‘A’ and ‘B’ respectively can be: |
| A. | n-Butane and Iso-butane |
| B. | C2H2 and C6H6 |
| C. | C2H4 and C4H8 |
| D. | N2O4 and NO2 |
| Answer» D. N2O4 and NO2 | |
| 1086. |
Hydrogenation of vegetable oil is an example for ______. |
| A. | Displacement reaction |
| B. | Addition reaction |
| C. | Combination reaction |
| D. | Substitution reaction |
| Answer» C. Combination reaction | |
| 1087. |
In tragedies caused by drinking spurious liquor, the active agent causing such tragedies is: |
| A. | Methyl alcohol |
| B. | Ethyl alcohol |
| C. | Amyl alcohol |
| D. | Benzyl alcohol |
| Answer» B. Ethyl alcohol | |
| 1088. |
pH of Human blood is: |
| A. | 7.8 |
| B. | 6.4 |
| C. | 6.8 |
| D. | 7.4 |
| Answer» E. | |
| 1089. |
Among the following, the one has highest mass is |
| A. | 40 g of Fe |
| B. | 6 moles of N2 at NTP |
| C. | 0.2 g of silver |
| D. | 1023 atoms of carbon |
| Answer» C. 0.2 g of silver | |
| 1090. |
In the manufacture of Vanaspati ghee from vegetable oils, which among the following gas is used? |
| A. | Nitrogen |
| B. | Carbon dioxide |
| C. | Hydrogen |
| D. | Neon |
| Answer» D. Neon | |
| 1091. |
Increasing rate of SN1 reaction in the following compounds is: |
| A. | A < B < C < D |
| B. | B < A < C < D |
| C. | B < A < D < C |
| D. | A < B < D < C |
| Answer» C. B < A < D < C | |
| 1092. |
Among the following species, the diamagnetic molecule is: |
| A. | NO |
| B. | CO |
| C. | B2 |
| D. | O2 |
| Answer» C. B2 | |
| 1093. |
An element reacts with water to produce hydrogen. The element may be |
| A. | very active metal |
| B. | very active non-metal |
| C. | heavy metal |
| D. | liquid non-metal |
| Answer» B. very active non-metal | |
| 1094. |
Identify the charge on the cation in the salt aluminum phosphate |
| A. | +3 |
| B. | +1 |
| C. | +2 |
| D. | 0 |
| Answer» B. +1 | |
| 1095. |
Brown colour of apple after cutting is due to |
| A. | Physical changes |
| B. | Chemical changes |
| C. | No change |
| D. | Biological change |
| Answer» C. No change | |
| 1096. |
Kaolinite is an ore of: |
| A. | Zinc |
| B. | Copper |
| C. | Aluminium |
| D. | Iron |
| Answer» D. Iron | |
| 1097. |
Constantan is an alloy of copper and _______. |
| A. | tin |
| B. | aluminium |
| C. | nickel |
| D. | iron |
| Answer» D. iron | |
| 1098. |
If a liquid crystallises into a solid, entropy will be: |
| A. | increases |
| B. | decreases |
| C. | zero |
| D. | remains unchanged |
| Answer» C. zero | |
| 1099. |
By which process Ethane can be obtained from Hexane? |
| A. | Addition |
| B. | Cracking |
| C. | Substitution |
| D. | Polymerisation |
| Answer» B. Cracking | |
| 1100. |
A homogeneous mixture contains two liquids. How are they separated? |
| A. | By filtration |
| B. | By evaporation |
| C. | By distillation |
| D. | By condensation |
| Answer» D. By condensation | |