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MCQOPTIONS
This section includes 1315 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 951. |
In Mendeleev's periodic table, the properties of the elements are considered a periodic function of their: |
| A. | Atomic mass |
| B. | Ionization enthalpy |
| C. | Atomic size |
| D. | Atomic number |
| Answer» B. Ionization enthalpy | |
| 952. |
In modern periodic table while going from top to bottom in a group ______._x005F_x000D_ |
| A. | size of an atom increases |
| B. | size of an atom decreases |
| C. | ionisation energy of an atom increases |
| D. | size and ionisation energy of an atom increases |
| Answer» E. | |
| 953. |
In Newlands table, the elements ___ were placed with the halogens. |
| A. | Ce and La |
| B. | Fe and Se |
| C. | Mn and As |
| D. | Co and Ni |
| Answer» E. | |
| 954. |
In known elements, the maximum number is of |
| A. | Metals |
| B. | Non Metals |
| C. | Metalloids |
| D. | None of these |
| Answer» B. Non Metals | |
| 955. |
In case of a standard hydrogen electrode |
| A. | absolute electrode potential is not zero |
| B. | absolute electrode potential is zero |
| C. | both absolute and standard electrode potential values are zero |
| D. | electrode potential is zero only at 25 deg C |
| Answer» B. absolute electrode potential is zero | |
| 956. |
In ethane, each carbon atom is bonded to:_x005F_x000D_ |
| A. | One atom |
| B. | Three atoms |
| C. | Five atoms |
| D. | Four atoms |
| Answer» E. | |
| 957. |
In isotopes the number of neutrons are |
| A. | same |
| B. | different |
| C. | both |
| D. | none |
| Answer» C. both | |
| 958. |
In hydrolysis reactions compounds react with |
| A. | carbon, causing decomposition |
| B. | glucose, causing decomposition |
| C. | water, causing decomposition |
| D. | hydrogen, causing decomposition |
| Answer» D. hydrogen, causing decomposition | |
| 959. |
In general the largest component of bog soils is |
| A. | organic matter |
| B. | water |
| C. | living organisms |
| D. | air |
| Answer» B. water | |
| 960. |
In atomic reactors,graphite is used as |
| A. | lubricant |
| B. | fuel |
| C. | linear of the ractor |
| D. | moderator |
| Answer» E. | |
| 961. |
In arc welding, Argon is used because of its |
| A. | Low reactivity with metal |
| B. | Ability to lower the melting point of the metal |
| C. | High flammability |
| D. | High calorific value |
| Answer» B. Ability to lower the melting point of the metal | |
| 962. |
In an acid base reaction which product is produced along with a salt? |
| A. | Hydrogen gas |
| B. | Water |
| C. | Oxygen gas |
| D. | Carbon dioxide |
| Answer» C. Oxygen gas | |
| 963. |
In addition to nitric acid, another acid which may render iron passive is |
| A. | acetic acid |
| B. | oxalic acid |
| C. | chromic acid |
| D. | citric acid |
| Answer» D. citric acid | |
| 964. |
In a water molecule, the ratio of mass of Hydrogen to the mass of Oxygen is always: |
| A. | 0.33402777777778 |
| B. | 0.29236111111111 |
| C. | 0.046527777777778 |
| D. | 0.047222222222222 |
| Answer» E. | |
| 965. |
In a concentrated solution there is |
| A. | no solute |
| B. | a large amount of solvent |
| C. | no solvent |
| D. | a large amount of solute |
| Answer» E. | |
| 966. |
In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is_x005F_x000D_ 1)Â A2B5_x005F_x000D_ 2)Â A3B2_x005F_x000D_ 3)Â A2B3_x005F_x000D_ 4)Â A3B4 |
| A. | Option 1 |
| B. | Option 2 |
| C. | Option 3 |
| D. | Option 4 |
| Answer» B. Option 2 | |
| 967. |
In a combination reaction there can be ______._x005F_x000D_ Â _x005F_x000D_ I. two or more than two reactants_x005F_x000D_ II. two or more than two products_x005F_x000D_ III. only one product_x005F_x000D_ |
| A. | Only I_x005F_x000D_ |
| B. | Only I and III |
| C. | Only I and II |
| D. | Only II |
| Answer» C. Only I and II | |
| 968. |
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 | |
| 969. |
In a compound, chemical energy is contained in the |
| A. | bonds |
| B. | movement of the electrons |
| C. | unbonded electrons |
| D. | nuclei of the atoms |
| Answer» B. movement of the electrons | |
| 970. |
In 540 gram of glucose, the number of moles present are |
| A. | 3 |
| B. | 1 |
| C. | 4 |
| D. | 2 |
| Answer» B. 1 | |
| 971. |
If the first and third members of a Dobereiner triad are Phosphorous and Antimony, the second member of this triad is |
| A. | Calcium |
| B. | Iodine |
| C. | Arsenic |
| D. | Sulphur |
| Answer» D. Sulphur | |
| 972. |
If the atomic number of Krypton is 36, then its electronic configuration is: |
| A. | 2,8,18,8 |
| B. | 2,8,20,6 |
| C. | 2,18,16 |
| D. | 2,18,8,8 |
| Answer» B. 2,8,20,6 | |
| 973. |
If we take a small amount of washing soda and add approximately 1 mL of dilute hydrochloric acid to it, what will we observe? |
| A. | only neutralisation reaction occurs, no gas is released |
| B. | white-coloured precipitate is formed |
| C. | CO2 gas comes out with brisk effervescence |
| D. | H2 gas comes out with pop sound |
| Answer» D. H2 gas comes out with pop sound | |
| 974. |
If the valency of Aluminum is 3 and that of Oxygen is 2, then the chemical formula of Aluminum oxide is_x005F_x000D_ |
| A. | AlO3+2 |
| B. | AlO2 |
| C. | Al3O2 |
| D. | Al2O3 |
| Answer» E. | |
| 975. |
If people sleep in closed rooms where charcoal fire is burning , they die due to |
| A. | carbon monoxide |
| B. | carbon dioxide |
| C. | methane |
| D. | phosgene |
| Answer» B. carbon dioxide | |
| 976. |
If H2O : Hydrogen, then KOH : ____x005F_x000D_ |
| A. | Cobalt |
| B. | Phosphorous |
| C. | Potassium |
| D. | Krypton |
| Answer» D. Krypton | |
| 977. |
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 | |
| 978. |
If an atom has atomic number 10 and mass number 23, then what will be the number of protons and neutrons in an atom respectively? |
| A. | 0, 10 |
| B. | 10, 23 |
| C. | 13, 10 |
| D. | 10, 13 |
| Answer» E. | |
| 979. |
"If a system A is in thermal equilibrium with B and B is in thermal equilibrium with C, then A and C are in equilibrium with each other". This is a statement of |
| A. | Cyclic rute |
| B. | Zeroth law of thermodynamics |
| C. | First law of thermodynamics |
| D. | Second law of thermodynamics |
| Answer» C. First law of thermodynamics | |
| 980. |
If a solution turns blue litmus red, its pH is likely to be |
| A. | 7 |
| B. | 8 |
| C. | 9 |
| D. | 6 |
| Answer» E. | |
| 981. |
Identify the metalloid in the following list? |
| A. | Silicon |
| B. | Sulphur |
| C. | Scandium |
| D. | All of the above |
| Answer» B. Sulphur | |
| 982. |
Identify a use of the isotope of uranium. |
| A. | Fuel in nuclear reactors |
| B. | Treatment of goitre |
| C. | Treatment of cancer |
| D. | Fuel in aeroplanes |
| Answer» B. Treatment of goitre | |
| 983. |
Ice floats on water because its density is |
| A. | more than water |
| B. | zero |
| C. | less than water |
| D. | same as water |
| Answer» D. same as water | |
| 984. |
Hydrophilic molecules readily associate with |
| A. | water |
| B. | alcohols |
| C. | both A & B |
| D. | none of the above |
| Answer» D. none of the above | |
| 985. |
Hydrogen bonds and hydrophilic interactions are |
| A. | Strong chemical bonds that hold together the atoms within a molecule |
| B. | Weak chemical bonds that hold together the atoms within a molecule |
| C. | Strong chemical bonds that link together separate molecules |
| D. | Weak chemical bonds that link together separate molecules |
| Answer» E. | |
| 986. |
Hydrogenation process is associated with which of the following? |
| A. | Rubber |
| B. | Petroleum |
| C. | Copper |
| D. | Edible fats |
| Answer» E. | |
| 987. |
How many valence electrons are in carbon? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 3 |
| Answer» C. 6 | |
| 988. |
How many types of isotopes does Scandium have?_x005F_x000D_ |
| A. | 9 |
| B. | 7 |
| C. | 10 |
| D. | 13 |
| Answer» E. | |
| 989. |
How many molecules of ATP are obtained by the respiration of one molecule of glucose?_x005F_x000D_ |
| A. | 36 |
| B. | 4 |
| C. | 38 |
| D. | 2 |
| Answer» E. | |
| 990. |
How many molecules are present in one mole of water?_x005F_x000D_ |
| A. | 6.02 x 1023 molecules |
| B. | 6.02 x 1026 molecules |
| C. | 8.02 x 1022 molecules |
| D. | 7.02 x 1023 molecules |
| Answer» B. 6.02 x 1026 molecules | |
| 991. |
How many groups and periods are present in the Modern Periodic Table? |
| A. | 9 groups, 9 periods |
| B. | 7 groups, 8 periods |
| C. | 18 groups, 7 periods |
| D. | 8 groups, 7 periods |
| Answer» D. 8 groups, 7 periods | |
| 992. |
How many groups are there in the modern periodic table?_x005F_x000D_ |
| A. | 9 |
| B. | 18 |
| C. | 21 |
| D. | 8 |
| Answer» C. 21 | |
| 993. |
How many groups and periods are present in the Modern Periodic Table?_x005F_x000D_ |
| A. | 8 groups and 6 periods |
| B. | 18 groups and 9 periods |
| C. | 18 groups and 7 periods |
| D. | 7 groups and 10 periods |
| Answer» D. 7 groups and 10 periods | |
| 994. |
How many elements are present in the group of the 18th Modem Periodic Table? |
| A. | 5 |
| B. | 2 |
| C. | 6 |
| D. | 7 |
| Answer» E. | |
| 995. |
How many Covalent Bonds can Nitrogen form |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» C. 4 | |
| 996. |
How many carbon and hydrogen atoms are there in Propane, respectively?_x005F_x000D_ |
| A. | 2, 4 |
| B. | 2, 6 |
| C. | 4, 7_x005F_x000D_ |
| D. | 3, 8 |
| Answer» E. | |
| 997. |
How many atoms are present in one molecule of Ozone? |
| A. | 4 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» E. | |
| 998. |
How many atoms will one mole of Carbon (C-12) contain? |
| A. | 6.02 x 1023 |
| B. | 8.06 x 1020 |
| C. | 6.02 x 1026 |
| D. | 60.20 x 1026 |
| Answer» B. 8.06 x 1020 | |
| 999. |
How are elements arranged in the Modern Periodic Table? |
| A. | In the increasing order of their Molecular Mass |
| B. | In the increasing order of their Atomic Mass |
| C. | In the increasing order of their Atomic Number |
| D. | In the increasing order of their Mass Number |
| Answer» C. In the increasing order of their Atomic Number | |
| 1000. |
Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due to |
| A. | dehydration |
| B. | oxidation |
| C. | reduction |
| D. | dehydrogenation |
| Answer» C. reduction | |