MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 265 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Ksp is known as |
| A. | solubility product |
| B. | solubility reactant |
| C. | dynamic equilibrium |
| D. | solubility equilibrium |
| Answer» B. solubility reactant | |
| 52. |
Sometimes, a reactant appearance in chemical equation has no effect on |
| A. | equation |
| B. | reaction rate |
| C. | equilibrium |
| D. | kinetics |
| Answer» C. equilibrium | |
| 53. |
Units of 'k' constant vary with the form of |
| A. | equation |
| B. | reactant |
| C. | products |
| D. | reactions |
| Answer» B. reactant | |
| 54. |
Using Eo values, help us to determine how easy and difficult it is to |
| A. | oxidize |
| B. | reduce |
| C. | catalyze |
| D. | reverse |
| Answer» D. reverse | |
| 55. |
The method in which small samples of the reaction mixture is carried out at various times for chemical analysis is called |
| A. | sampling |
| B. | analyzing |
| C. | continuous |
| D. | none of above |
| Answer» B. analyzing | |
| 56. |
If the water coming in the reservoir becomes equal to water going out of it will be called as it is in |
| A. | equilibrium |
| B. | translocated |
| C. | equal |
| D. | constant |
| Answer» B. translocated | |
| 57. |
Law relating to concentrations of substances present at equilibrium and to the stoichiometric equation is known as |
| A. | Law of mass action |
| B. | Charle's Law |
| C. | Law of conversation of energy |
| D. | Boyle's law |
| Answer» B. Charle's Law | |
| 58. |
The shell of Nautilus is composed in sea when there is higher concentration of |
| A. | carbonate (CO₃⁻²) ion |
| B. | calcium (Ca⁺²) ion |
| C. | oxide (O⁻²) ion |
| D. | hydrogen (H⁺) ion |
| Answer» D. hydrogen (H⁺) ion | |
| 59. |
The standard condition for enthalpy change are |
| A. | pressure of 105 |
| B. | temperature 298 K |
| C. | normal physical state |
| D. | all of above |
| Answer» E. | |
| 60. |
The positive charge on the nucleus down the group II |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | varies depending on atomic size |
| Answer» B. decreases | |
| 61. |
Fizzy drinks contain dissolved |
| A. | oxygen |
| B. | carbon dioxide |
| C. | nitrogen |
| D. | water |
| Answer» C. nitrogen | |
| 62. |
When two solutions are mixed solubility product helps in determining whether there will be production of |
| A. | salts |
| B. | oxides |
| C. | precipitates |
| D. | none of above |
| Answer» D. none of above | |
| 63. |
Ethanoic acid (CH₃COOH) is present in |
| A. | lemon |
| B. | orange |
| C. | vinegar |
| D. | grapes |
| Answer» D. grapes | |
| 64. |
The reaction occurs by transmitting ultraviolet radiation through a sample is done using |
| A. | reaction vessel |
| B. | observation cell |
| C. | dilatometer |
| D. | calorimeter |
| Answer» C. dilatometer | |
| 65. |
Consider the reaction: Na(s) + H₂O(l) → NaOH(aq) + H₂(g). Moles of Na required to balance the equation are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 66. |
The pH of NaOH produced after Na(s) and H₂O(l) reaction is |
| A. | exactly zero |
| B. | below 7 |
| C. | above 7 |
| D. | exactly 14 |
| Answer» E. | |
| 67. |
Le chatellier's principle states that if one or more factors disturbs the equilibrium, the position of equilibrium will shift where the change will be |
| A. | reduced |
| B. | induced |
| C. | increased |
| D. | oxidized |
| Answer» B. induced | |
| 68. |
A balanced chemical equation doesn't give any information about |
| A. | rate of reaction |
| B. | type of reaction |
| C. | reactants |
| D. | products |
| Answer» B. type of reaction | |
| 69. |
The units of concentration is |
| A. | moldm⁻³ |
| B. | moldm⁻³s⁻¹ |
| C. | dm³mol⁻¹ |
| D. | dm³mol⁻¹s⁻¹ |
| Answer» B. moldm⁻³s⁻¹ | |
| 70. |
When the bond is broken homolytically the species produced are called |
| A. | free electrons |
| B. | free radicals |
| C. | free atoms |
| D. | free bond |
| Answer» C. free atoms | |
| 71. |
In combustion reactions, alkanes react with |
| A. | oxygen |
| B. | nitrogen |
| C. | water |
| D. | hydrogen |
| Answer» B. nitrogen | |
| 72. |
The overall representation of a reaction rate in terms of the equation is known as |
| A. | rate of reaction |
| B. | rate equation |
| C. | reaction equation |
| D. | balanced equation |
| Answer» C. reaction equation | |
| 73. |
Generally, the alkanes are said to have been |
| A. | reactive |
| B. | unreactive |
| C. | highly reactive |
| D. | stable |
| Answer» C. highly reactive | |
| 74. |
The body of the car is repaired with the help of a filler which is hardened by the addition of |
| A. | hydrogen peroxide |
| B. | benzyl peroxide |
| C. | aluminum peroxide |
| D. | nitrogen peroxide |
| Answer» C. aluminum peroxide | |
| 75. |
When allowed to react with cold water, the element that reacts vigorously to produce H₂(g) is |
| A. | Na(s) |
| B. | Mg(s) |
| C. | Al(s) |
| D. | Ca(s) |
| Answer» B. Mg(s) | |
| 76. |
If alkane is supplied with plenty of oxygen it will undergo |
| A. | complete combustion |
| B. | substitution |
| C. | addition |
| D. | hydrolysis |
| Answer» B. substitution | |
| 77. |
The chemical reaction between carbonyl compounds and DNPH is an example of |
| A. | condensation reaction |
| B. | substitution reaction |
| C. | addition reaction |
| D. | elimination reaction |
| Answer» B. substitution reaction | |
| 78. |
The small changes in volume are measured by an instrument called |
| A. | spectrometer |
| B. | calorimeter |
| C. | colorimeter |
| D. | dilatometer |
| Answer» E. | |
| 79. |
In NaCl, the oxidation number of Cl₂ is reduced from zero to |
| A. | +2 |
| B. | +1 |
| C. | −1 |
| D. | −2 |
| Answer» D. −2 | |
| 80. |
The electronegativity of Bromine (B) is |
| A. | 3.04 |
| B. | 3.55 |
| C. | 2.96 |
| D. | 2.2 |
| Answer» D. 2.2 | |
| 81. |
Consider the reaction: Si(s) + Cl₂(g) → SiCl₄ (l). Moles of SiCl₄ produced with 2 moles of Cl₂ will be |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 82. |
The overall reaction in the series of proper steps is termed as |
| A. | mechanism |
| B. | reaction |
| C. | reaction mechanism |
| D. | none of above |
| Answer» D. none of above | |
| 83. |
The reduction in solubility of dissolved salt is gained by the addition of a solution of compound, which has an ion common with that of dissolved salt it is |
| A. | common ion effect |
| B. | ion reaction |
| C. | reduction of ion |
| D. | compound reduction |
| Answer» B. ion reaction | |
| 84. |
As methyl group (-CH₃) is electron (e⁻) donating, ethanoic acid (CH₃COOH) is the |
| A. | weakest acid |
| B. | weakest base |
| C. | strongest acid |
| D. | strongest base |
| Answer» B. weakest base | |
| 85. |
In our blood, hemoglobin is bound to oxygen in an |
| A. | equilibrium expression |
| B. | equilibrium relation |
| C. | equilibrium reactions |
| D. | equilibrium constant |
| Answer» D. equilibrium constant | |
| 86. |
Halogen that can react with noble gases like Xe is |
| A. | F |
| B. | Cl |
| C. | Br |
| D. | I |
| Answer» B. Cl | |
| 87. |
The rate of reaction is increased with the increase in |
| A. | concentration of reactant only |
| B. | temperature only |
| C. | pressure |
| D. | concentration of reactant and temperature |
| Answer» E. | |
| 88. |
The word 'macroscopic' means which can be seen by |
| A. | light microscope |
| B. | compound microscope |
| C. | naked eye |
| D. | none of above |
| Answer» D. none of above | |
| 89. |
The rate constant is the |
| A. | proportionality constant |
| B. | K |
| C. | kΔH |
| D. | none of above |
| Answer» D. none of above | |
| 90. |
To analyze a data a graph is plotted in the first step following |
| A. | taking tangents only |
| B. | calculating slope only |
| C. | using quadratic equations |
| D. | both a and b |
| Answer» E. | |
| 91. |
Non-polar alkanes do not react with |
| A. | polar compounds only |
| B. | water only |
| C. | base |
| D. | polar compounds and water |
| Answer» E. | |
| 92. |
The silver ions Ag⁺ act as |
| A. | reducing agent |
| B. | oxidizing agent |
| C. | catalyst |
| D. | none of above |
| Answer» C. catalyst | |
| 93. |
The formula MgO shows Mg oxidation number to be |
| A. | +1 |
| B. | +2 |
| C. | −1 |
| D. | −2 |
| Answer» C. −1 | |
| 94. |
In order to identify precipitates which are obtained can be matched with respecting |
| A. | melting point data |
| B. | electronegativity |
| C. | polarity |
| D. | masses |
| Answer» B. electronegativity | |
| 95. |
The Halogens (F₂, Cl₂, Br₂, I₂) get least reactive going |
| A. | up the group |
| B. | down the group |
| C. | across the period |
| D. | diagonally |
| Answer» C. across the period | |
| 96. |
Consider the reaction: Na(s) + H₂O → NaOH(aq) + H₂(g). Moles of H₂O required to balance the equation will be |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 97. |
Hydrogen peroxide (H₂O₂) reacts with iodide ions (I⁻) to form water (H₂O) and iodine (I₂) in presence of |
| A. | iodide (I⁻) ions |
| B. | hydrogen (H⁺) ions |
| C. | oxide (O⁻²) ions |
| D. | hydroxyl (OH⁻) ions |
| Answer» C. oxide (O⁻²) ions | |
| 98. |
The element that reacts vigorously with cold water among the following is |
| A. | Na(s) |
| B. | Mg(s) |
| C. | Ca(s) |
| D. | Al(s) |
| Answer» B. Mg(s) | |
| 99. |
In car engine, the combustion of octane (C₈H₁₈) is done in |
| A. | petrol |
| B. | air |
| C. | radiator fluid |
| D. | gear oil |
| Answer» B. air | |
| 100. |
The half-life of the first-order reaction is |
| A. | greater |
| B. | lesser |
| C. | high |
| D. | constant |
| Answer» E. | |