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MCQOPTIONS
This section includes 11242 Mcqs, each offering curated multiple-choice questions to sharpen your Joint Entrance Exam - Main (JEE Main) knowledge and support exam preparation. Choose a topic below to get started.
| 6051. |
When an electric current is passed through acidulated water 112 ml of hydrogen gas at N.T.P. collect at the cathode in 965 seconds. The current passed, in amperes is [MNR 1991; UPSEAT 2001] |
| A. | 1.0 |
| B. | 0.5 |
| C. | 0.1 |
| D. | 2.0 |
| Answer» B. 0.5 | |
| 6052. |
A silver cup is plated with silver by passing 965 coulombs of electricity, the amount of silver deposited is [EAMCET 1990; MP PET 1994, 97] |
| A. | 9.89 g |
| B. | 107.87 g |
| C. | 1.0787 g |
| D. | 1.002 g |
| Answer» D. 1.002 g | |
| 6053. |
Total charge on 1 mole of a monovalent metal ion is equal to [DPMT 2001] |
| A. | \[9.65\times {{10}^{4}}\,\,\,Coulomb\] |
| B. | \[6.28\times {{10}^{18}}\,\,\,Coulomb\] |
| C. | \[1.6\times {{10}^{-19}}\,\,\,Coulomb\] |
| D. | None of these |
| Answer» B. \[6.28\times {{10}^{18}}\,\,\,Coulomb\] | |
| 6054. |
Then during electrolysis of a solution of AgNO3, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited in the cathode will be [AIEEE 2003] |
| A. | 1.08 g |
| B. | 10.8 g |
| C. | 21.6 g |
| D. | 108 g |
| Answer» C. 21.6 g | |
| 6055. |
In a metal oxide, there is 20% oxygen by weight. Its equivalent weight is [Pb. PMT 2000] |
| A. | 40 |
| B. | 64 |
| C. | 72 |
| D. | 32 |
| Answer» E. | |
| 6056. |
A current being passed for two hour through a solution of an acid liberating 11.2 litre of oxygen at NTP at anode. What will be the amount of copper deposited at the cathode by the same current when passed through a solution of copper sulphate for the same time [BVP 2003] |
| A. | 16 g |
| B. | 63 g |
| C. | 31.5 g |
| D. | 8 g |
| Answer» C. 31.5 g | |
| 6057. |
On passing a current through \[KCl\] solution, \[19.5\,g\] of potassium is deposited. If the same quantity of electricity is passed through a solution of aluminium chloride, the amount of aluminium deposited is [EAMCET 1997] |
| A. | 4.5 g |
| B. | 9.0 g |
| C. | 13.5 g |
| D. | 27 g |
| E. | None is correct |
| Answer» B. 9.0 g | |
| 6058. |
Electrolysis rules of Faraday?s states that mass deposited on electrode is proportional to [CBSE PMT 2000] |
| A. | \[m\,\,\propto {{I}^{2}}\] |
| B. | \[m\,\,\propto Q\] |
| C. | \[m\,\,\propto \,\,{{Q}^{2}}\] |
| D. | None of these |
| Answer» C. \[m\,\,\propto \,\,{{Q}^{2}}\] | |
| 6059. |
On passing 0.5 faraday of electricity through \[NaCl\], the amount of \[Cl\] deposited on cathode is [BHU 1997; RPET 1999] |
| A. | 35.5 gm |
| B. | 17.75 gm |
| C. | 71 gm |
| D. | 142 gm |
| Answer» C. 71 gm | |
| 6060. |
How many atoms of calcium will be deposited from a solution of \[CaC{{l}_{2}}\] by a current of 25 milliamperes flowing for 60 seconds [BHU 1999] |
| A. | \[4.68\times {{10}^{18}}\] |
| B. | \[4.68\times {{10}^{15}}\] |
| C. | \[4.68\times {{10}^{12}}\] |
| D. | \[4.68\times {{10}^{9}}\] |
| Answer» B. \[4.68\times {{10}^{15}}\] | |
| 6061. |
Three faradays electricity was passed through an aqueous solution of iron (II) bromide. The weight of iron metal (at. wt. = 56) deposited at the cathode (in gm) is [EAMCET 1991] |
| A. | 56 |
| B. | 84 |
| C. | 112 |
| D. | 168 |
| Answer» C. 112 | |
| 6062. |
When 0.04 faraday of electricity is passed through a solution of \[CaS{{O}_{4}}\], then the weight of \[C{{a}^{2+}}\] metal deposited at the cathode is [BHU 1996] |
| A. | 0.2 gm |
| B. | 0.4 gm |
| C. | 0.6 gm |
| D. | 0.8 gm |
| Answer» E. | |
| 6063. |
According to the first law of Faraday, the weight of a substance discharge at the electrode is |
| A. | \[W=ZQ\] |
| B. | \[W=eF\] |
| C. | \[W=\frac{Z}{F}\,It\] |
| D. | \[W=ZI\] |
| Answer» B. \[W=eF\] | |
| 6064. |
Faraday's laws of electrolysis will fail when [NCERT 1971] |
| A. | Temperature is increased |
| B. | Inert electrodes are used |
| C. | A mixture of electrolytes is used |
| D. | In none of these cases |
| Answer» E. | |
| 6065. |
In electrolysis of a fused salt, the weight of the deposit on an electrode will not depend on [CPMT 1973] |
| A. | Temperature of the bath |
| B. | Current intensity |
| C. | Electrochemical equivalent of ions |
| D. | Time for electrolysis |
| Answer» B. Current intensity | |
| 6066. |
How many Faradays are required to generate one gram atom of magnesium from \[MgC{{l}_{2}}\] [MADT Bihar 1982] |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 6067. |
On passing \[C\] ampere of electricity through a electrolyte solution for \[t\] second, \[m\]gram metal deposits on cathode. The equivalent weight \[E\] of the metal is [MP PMT 1990] |
| A. | \[E=\frac{C\times t}{m\times 96500}\] |
| B. | \[E=\frac{C\times m}{t\times 96500}\] |
| C. | \[E=\frac{96500\times m}{C\times t}\] |
| D. | \[E=\frac{C\times t\times 96500}{m}\] |
| Answer» D. \[E=\frac{C\times t\times 96500}{m}\] | |
| 6068. |
The platinum electrodes were immersed in a solution of cupric sulphate and electric current passed through the solution. After some time it was found that colour of copper sulphate disappeared with evolution of gas at the electrode. The colourless solution contains [NCERT 1984] |
| A. | Platinum sulphate |
| B. | Copper hydroxide |
| C. | Copper sulphate |
| D. | Sulphuric acid |
| Answer» E. | |
| 6069. |
When 9.65 coulombs of electricity is passed through a solution of silver nitrate (atomic weight of \[Ag=107.87\] taking as 108) the amount of silver deposited is [EAMCET 1992; KCET 2000] |
| A. | 10.8 mg |
| B. | 5.4 mg |
| C. | 16.2 mg |
| D. | 21.2 mg |
| Answer» B. 5.4 mg | |
| 6070. |
One Faraday of electricity when passed through a solution of copper sulphate deposits [CPMT 1978] |
| A. | 1 mole of \[Cu\] |
| B. | 1 gm atom of \[Cu\] |
| C. | 1 molecule of \[Cu\] |
| D. | 1 gm equivalent of \[Cu\] |
| Answer» E. | |
| 6071. |
On passing one faraday of electricity through the electrolytic cells containing \[A{{g}^{+}},\,\,N{{i}^{+2}}\]and \[C{{r}^{+3}}\]ions solution, the deposited \[Ag\,(At.\,\,wt.=108),\,\,Ni\,(At.\,wt.=59)\] and \[Cr\,(At.\,wt.=52)\] is [AIIMS 1982] |
| A. | \[Ag\] \[Ni\] \[Cr\] 108 gm 29.5 gm 17.3 gm |
| B. | 108 gm 59.0 gm 52.0 gm |
| C. | 108.0 gm 108.0 gm 108.0 gm |
| D. | 108 gm 117.5 gm 166.0 gm |
| Answer» B. 108 gm 59.0 gm 52.0 gm | |
| 6072. |
The desired amount of charge for obtaining one mole of \[Al\] from \[A{{l}^{3+}}\] |
| A. | \[3\times 96500\,\,C\] |
| B. | \[96500\,\,C\] |
| C. | \[\frac{96500}{3}C\] |
| D. | \[\frac{96500}{2}C\] |
| Answer» B. \[96500\,\,C\] | |
| 6073. |
On passing 3 ampere of electricity for 50 minutes, 1.8 gram metal deposits. The equivalent mass of metal is [MP PMT 1992] |
| A. | 20.5 |
| B. | 25.8 |
| C. | 19.3 |
| D. | 30.7 |
| Answer» D. 30.7 | |
| 6074. |
In an electroplating experiment \[m\,\,g\]of silver is deposited, when 4 amperes of current flows for 2 minutes. The amount (in \[gms\]) of silver deposited by 6 amperes of current flowing for 40 seconds will be [MNR 1991] |
| A. | \[4m\] |
| B. | \[m/2\] |
| C. | \[m/4\] |
| D. | \[2m\] |
| Answer» C. \[m/4\] | |
| 6075. |
5 amperes is passed through a solution of zinc sulphate for 40 minutes. Find the amount of zinc deposited at the cathode [CBSE PMT 1996] |
| A. | 40.65 gm |
| B. | 4.065 gm |
| C. | 0.4065 gm |
| D. | 65.04 gm |
| Answer» C. 0.4065 gm | |
| 6076. |
Which of the following represents the first law of Faraday [MP PMT 1991] |
| A. | \[E=m{{c}^{2}}\] |
| B. | \[E=hv\] |
| C. | \[m=ect\] |
| D. | \[PV=nRT\] |
| Answer» D. \[PV=nRT\] | |
| 6077. |
On passing 0.1 Faraday of electricity through aluminium chloride, the amount of aluminium metal deposited on cathode is \[(Al=27)\] [MP PMT 1991] |
| A. | 0.9 gm |
| B. | 0.3 gm |
| C. | 0.27 gm |
| D. | 2.7 gm |
| Answer» B. 0.3 gm | |
| 6078. |
Amount of electricity that can deposit 108 gm of silver from AgNO3 solution is [AFMC 1993; MP PMT 2004] |
| A. | 1 ampere |
| B. | 1 coulomb |
| C. | 1 faraday |
| D. | None of the above |
| Answer» D. None of the above | |
| 6079. |
If the current is passed into the solution of an electrolyte [AIIMS 1979] |
| A. | Anions move towards anode, cations towards cathode |
| B. | Anions and cations both move towards anode |
| C. | Anions move towards cathode, cations towards anode |
| D. | No movement of ions takes place |
| Answer» B. Anions and cations both move towards anode | |
| 6080. |
Which one of the following is an s - block element [MP PMT 1999] |
| A. | Aluminium |
| B. | Chromium |
| C. | Niobium |
| D. | Potassium |
| Answer» E. | |
| 6081. |
Coloured salts are formed by [Bihar MEE 1996] |
| A. | Alkali metals |
| B. | Lanthanides |
| C. | Actinides |
| D. | Transition metals |
| E. | None of these |
| Answer» E. None of these | |
| 6082. |
The element with atomic number 55 belongs to [MP PMT 1995] |
| A. | s-block |
| B. | p-block |
| C. | d-block |
| D. | f-block |
| Answer» B. p-block | |
| 6083. |
The number of elements in the 5th period of the periodic table are |
| A. | 8 |
| B. | 10 |
| C. | 18 |
| D. | 32 |
| Answer» D. 32 | |
| 6084. |
An element M has an atomic mass 19 and atomic number 9. Its ion is represented by |
| A. | \[{{M}^{+}}\] |
| B. | \[{{M}^{-}}\] |
| C. | \[{{M}^{2+}}\] |
| D. | \[{{M}^{2-}}\] |
| Answer» C. \[{{M}^{2+}}\] | |
| 6085. |
Who is called the father of chemistry [CPMT 1972] |
| A. | Faraday |
| B. | Priestley |
| C. | Rutherford |
| D. | Lavosier |
| Answer» E. | |
| 6086. |
The most importasnt active step in the development of periodic table was taken by [CPMT 1976] |
| A. | Mendeleef |
| B. | Dalton |
| C. | Avogadro |
| D. | Cavendish |
| Answer» B. Dalton | |
| 6087. |
Element having atomic number 17 is placed in [MP PET 1995] |
| A. | I-group |
| B. | V-group |
| C. | VIII-group |
| D. | VII-group |
| Answer» E. | |
| 6088. |
\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}\] is the electronic configuration of the metal [RPET 2000] |
| A. | \[Na\] |
| B. | \[Mg\] |
| C. | \[Fe\] |
| D. | \[Al\] |
| Answer» C. \[Fe\] | |
| 6089. |
Lithium shows diagonal relationship with [MP PET 1995, 96; EAMCET 1990] |
| A. | Al |
| B. | Mg |
| C. | Be |
| D. | B |
| Answer» C. Be | |
| 6090. |
Elements with outer electronic configuration \[n{{s}^{2}}n{{p}^{6}}\] are [MP PET/PMT 1998] |
| A. | Alkaline earth metals |
| B. | Transition elements |
| C. | Chalcogenes |
| D. | Noble gases |
| Answer» E. | |
| 6091. |
The lightest metal is [CPMT 1976; NCERT 1976; AFMC 1988] |
| A. | \[Li\] |
| B. | \[Mg\] |
| C. | \[Ca\] |
| D. | \[Na\] |
| Answer» B. \[Mg\] | |
| 6092. |
Which of the following is a inert element |
| A. | Na |
| B. | Fe |
| C. | Li |
| D. | He |
| Answer» E. | |
| 6093. |
An atom with atomic number 21 belongs to the category of [Kurukshetra CEE 1991] |
| A. | \[s\]-block elements |
| B. | \[p\]-block elements |
| C. | \[d\]-block elements |
| D. | \[f\]-block elements |
| Answer» D. \[f\]-block elements | |
| 6094. |
The most predominantly ionic compounds will be obtained from the combination of elements belonging to |
| A. | 1 and 7 groups |
| B. | 2 and 6 groups |
| C. | 3 and 5 groups |
| D. | 0 and 7 groups |
| Answer» B. 2 and 6 groups | |
| 6095. |
All the elements in a group in the periodic table have the same [NCERT 1974; MP PET 1996; MP PMT 1996] |
| A. | Atomic number |
| B. | Electronic configuration |
| C. | Atomic weight |
| D. | Number of electrons in the outermost shell or number of electrons for bonding |
| Answer» E. | |
| 6096. |
The fundamental basis of the present-day Periodic Table is that elements are [JIPMER 1999] |
| A. | Arranged in the order of increasing atomic weights |
| B. | Grouped according to chemical properties |
| C. | Arranged in the order of increasing number of neutrons in the atomic nucleus |
| D. | Arranged in the order of increasing number of protons in the nucleus |
| Answer» E. | |
| 6097. |
Chloride of an element \[A\] gives neutral solution in water. In the periodic table, the element \[A\] belongs to [AIIMS 1992; UPSEAT 2001] |
| A. | First group |
| B. | Third group |
| C. | Fifth group |
| D. | First transition series |
| Answer» B. Third group | |
| 6098. |
The electronic configuration of an atom A is \[1{{s}^{2}},\] \[2{{s}^{2}}{{p}^{6}},\] \[3{{s}^{2}}{{p}^{6}}{{d}^{10}},\,4{{s}^{2}}{{p}^{3}}\]. The chemistry of A is therefore likely to be similar to that of [MP PMT 1995] |
| A. | Chlorine |
| B. | Nitrogen |
| C. | Oxygen |
| D. | Boron |
| Answer» C. Oxygen | |
| 6099. |
Which one of the following combination represents a metallic element [EAMCET 1979] |
| A. | 2, 8, 7 |
| B. | 2, 8, 8 |
| C. | 2, 8, 4 |
| D. | 2, 8, 2 |
| Answer» E. | |
| 6100. |
The last member in each period of the periodic table is [DPMT 2001] |
| A. | An inert gas element |
| B. | A transition element |
| C. | A halogen |
| D. | An alkali metal |
| Answer» B. A transition element | |