MCQOPTIONS
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MCQOPTIONS
This section includes 80 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which of the following metals displaces \[S{{O}_{2}}\] gas from concentrated sulphuric acid |
| A. | \[Mg\] |
| B. | \[Zn\] |
| C. | \[Cu\] |
| D. | None of these |
| Answer» D. None of these | |
| 52. |
In which of the following ionic radii of chromium would be smallest [MP PET 1994] |
| A. | \[{{K}_{2}}Cr{{O}_{4}}\] |
| B. | \[Cr{{O}_{2}}\] |
| C. | \[CrC{{l}_{3}}\] |
| D. | \[Cr{{F}_{2}}\] |
| Answer» B. \[Cr{{O}_{2}}\] | |
| 53. |
Besides \[Zn\] and \[Cu\], german silver contains the metal [MP PET 1997] |
| A. | \[Sn\] |
| B. | \[Ag\] |
| C. | \[Ni\] |
| D. | \[Mg\] |
| Answer» D. \[Mg\] | |
| 54. |
Identify the statement which is not correct regarding \[CuS{{O}_{4}}\] [MNR 1992; Pb. PMT 1998] |
| A. | It reacts with \[KI\] to give iodine |
| B. | It reacts with \[KCl\] to give \[C{{u}_{2}}C{{l}_{2}}\] |
| C. | It reacts with \[NaOH\] and glucose to give \[C{{u}_{2}}O\] |
| D. | It gives \[CuO\] on strong heating in air |
| Answer» C. It reacts with \[NaOH\] and glucose to give \[C{{u}_{2}}O\] | |
| 55. |
Which of the following is correct [BHU 1995] |
| A. | Gun metal :\[Cu+Zn+Sn\] |
| B. | Duralumin : \[Al+Cu+Mg+Ag\] |
| C. | German silver : \[Cu+Zn+C\] |
| D. | Solder : \[Pb+Al\] |
| Answer» B. Duralumin : \[Al+Cu+Mg+Ag\] | |
| 56. |
The metal which is the best conductor of electricity is [CPMT 1996] |
| A. | Iron |
| B. | Copper |
| C. | Silver |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 57. |
The most convenient method to protect bottom of ship made of iron is [CBSE PMT 2001; Kerala (Engg.) 2002] |
| A. | White tin platting |
| B. | Coating with red lead oxide |
| C. | Connecting with ?Pb? block |
| D. | Connecting with ?Mg? block |
| Answer» B. Coating with red lead oxide | |
| 58. |
Annealing is [Pune CET 1998; AFMC 2002] |
| A. | Heating steel in nitrogen and cooling |
| B. | Heating steel to bright redness and then cooling slowly |
| C. | Heating wrought iron with carbon to redness |
| D. | Heating steel to high temperature and cooling suddenly by plunging in water |
| Answer» C. Heating wrought iron with carbon to redness | |
| 59. |
Metal oxides which decomposes on heating is [MNR 1984; UPSEAT 1999] |
| A. | \[ZnO\] |
| B. | \[A{{l}_{2}}{{O}_{3}}\] |
| C. | \[CuO\] |
| D. | \[N{{a}_{2}}O\] |
| E. | \[HgO\] |
| Answer» F. | |
| 60. |
An alloy which does not contain copper is [DPMT 1984] |
| A. | Solder |
| B. | Bronze |
| C. | Brass |
| D. | Bell metal |
| Answer» B. Bronze | |
| 61. |
Mohr's salt is [KCET 1993;DCE 1999; AIIMS 2000] |
| A. | \[FeS{{O}_{4}}.7{{H}_{2}}O\] |
| B. | \[Fe(N{{H}_{4}})S{{O}_{4}}.6{{H}_{2}}O\] |
| C. | \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}.FeS{{O}_{4}}.6{{H}_{2}}O\] |
| D. | \[[Fe{{(N{{H}_{4}})}_{2}}]\,{{(S{{O}_{4}})}_{2}}.6{{H}_{2}}O\] |
| Answer» D. \[[Fe{{(N{{H}_{4}})}_{2}}]\,{{(S{{O}_{4}})}_{2}}.6{{H}_{2}}O\] | |
| 62. |
Which of the following is used to prepare medical instruments |
| A. | Cast iron |
| B. | Wrought iron |
| C. | Steel |
| D. | Alloy of \[Cu\] and \[Fe\] |
| Answer» D. Alloy of \[Cu\] and \[Fe\] | |
| 63. |
If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called [Kerala (Med.) 2002] |
| A. | Tempering |
| B. | Hardening |
| C. | Softening |
| D. | Annealing |
| Answer» B. Hardening | |
| 64. |
The presence of \[Mn\] in steel produces |
| A. | Elasticity |
| B. | Increases tensile strength |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 65. |
\[{{F}_{2}}\] is the formed by reacting \[{{K}_{2}}Mn{{F}_{6}}\] with [AIIMS 2005] |
| A. | \[Sb{{F}_{5}}\] |
| B. | \[Mn{{F}_{3}}\] |
| C. | \[KSb{{F}_{6}}\] |
| D. | \[Mn{{F}_{4}}\] |
| Answer» B. \[Mn{{F}_{3}}\] | |
| 66. |
Which of the following is found in body [CPMT 1975] |
| A. | \[Pb\] |
| B. | \[Fe\] |
| C. | \[Cd\] |
| D. | \[Al\] |
| Answer» C. \[Cd\] | |
| 67. |
Nickel steel contain % of Ni [MP PMT/PET 1988] |
| A. | \[1-5%\] |
| B. | \[3-5%\] |
| C. | \[6-5%\] |
| D. | \[8-5%\] |
| Answer» C. \[6-5%\] | |
| 68. |
Stainless steel is an alloy steel of the following metals [MP PET 1990; Pb. PET 1999; KCET 2000] |
| A. | \[Fe\] Only |
| B. | Cr and Ni |
| C. | W and Cr |
| D. | Ni and Be |
| Answer» C. W and Cr | |
| 69. |
Emery consists of[AFMC 1999] |
| A. | Impure corundum |
| B. | Impure carborundum |
| C. | Impure graphite |
| D. | Purest form of iron |
| Answer» B. Impure carborundum | |
| 70. |
Steel is manufactured from |
| A. | Wrought iron |
| B. | Cast iron |
| C. | A and B both |
| D. | Haematite |
| Answer» D. Haematite | |
| 71. |
Excess of KI reacts with \[CuS{{O}_{4}}\] solution and then \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] solution is added to it. Which of the statements is incorrect for this reaction[AIEEE 2004] |
| A. | \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] is oxidised |
| B. | \[Cu{{I}_{2}}\] is formed |
| C. | \[C{{u}_{2}}{{I}_{2}}\]is formed |
| D. | Evolved \[{{I}_{2}}\] is reduced |
| Answer» C. \[C{{u}_{2}}{{I}_{2}}\]is formed | |
| 72. |
\[{{[Sc{{({{H}_{2}}O)}_{6}}]}^{3+}}\] ion is[Pb. CET 2004] |
| A. | Colourless and diamagnetic |
| B. | Coloured and octahedral |
| C. | Colourless and paramagnetic |
| D. | Coloured and paramagnetic |
| Answer» B. Coloured and octahedral | |
| 73. |
Vanadium (III) oxide is a strong [Kerala PMT 2004] |
| A. | Drying agent |
| B. | Oxidising agent |
| C. | Reducing agent |
| D. | Wetting agent |
| E. | Precipitating agent |
| Answer» D. Wetting agent | |
| 74. |
Which of the following is more soluble in ammonia [MH CET 2003] |
| A. | AgCl |
| B. | AgBr |
| C. | Agl |
| D. | None of these |
| Answer» B. AgBr | |
| 75. |
Which one of the following is highest melting halide [DCE 2003] |
| A. | AgCl |
| B. | AgBr |
| C. | AgF |
| D. | Agl |
| Answer» D. Agl | |
| 76. |
KI and \[CuS{{O}_{4}}\] solution when mixed, give[CPMT 2004; UPSEAT 2004] |
| A. | \[Cu{{I}_{2}}+{{K}_{2}}S{{O}_{4}}\] |
| B. | \[C{{u}_{2}}{{I}_{2}}+{{K}_{2}}S{{O}_{4}}\] |
| C. | \[{{K}_{2}}S{{O}_{4}}+C{{u}_{2}}{{I}_{2}}+{{I}_{2}}\] |
| D. | \[{{K}_{2}}S{{O}_{4}}+Cu{{I}_{2}}+{{I}_{2}}\] |
| Answer» D. \[{{K}_{2}}S{{O}_{4}}+Cu{{I}_{2}}+{{I}_{2}}\] | |
| 77. |
How \[{{H}_{2}}S\] is liberated in laboratory [JEE Orissa 2004] |
| A. | \[FeS{{O}_{4}}+{{H}_{2}}S{{O}_{4}}\] |
| B. | \[FeS+dil.\ {{H}_{2}}S{{O}_{4}}\] |
| C. | \[FeS+\text{conc}\text{. }{{H}_{2}}S{{O}_{4}}\] |
| D. | Elementary \[{{H}_{2}}\]+ elementary S |
| Answer» C. \[FeS+\text{conc}\text{. }{{H}_{2}}S{{O}_{4}}\] | |
| 78. |
Number of moles of \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] reduced by one mole of \[S{{n}^{2+}}\] ions is [KCET 1996] |
| A. | 1/3 |
| B. | 3 |
| C. | 1.6 |
| D. | 6 |
| Answer» B. 3 | |
| 79. |
In the reduction of dichromate by \[Fe(II)\]the number of electrons involved per chromium atom is [Pb. PMT 2001] |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» C. 4 | |
| 80. |
Manganese achieves its highest oxidation state in its compound [MP PET 1993, 2001; MP PMT 2004] |
| A. | \[Mn{{O}_{3}}\] |
| B. | \[M{{n}_{3}}{{O}_{4}}\] |
| C. | \[KMn{{O}_{4}}\] |
| D. | \[{{K}_{2}}Mn{{O}_{4}}\] |
| Answer» D. \[{{K}_{2}}Mn{{O}_{4}}\] | |