MCQOPTIONS
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MCQOPTIONS
This section includes 1184 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Which one shows high %age of the ionic character ? |
| A. | H2O |
| B. | HF |
| C. | HCI |
| D. | HBr |
| Answer» C. HCI | |
| 102. |
Which order of ionization energy is correct_________________? |
| A. | Mg P |
| B. | Mg > A1 |
| C. | both A & B |
| D. | None of these |
| Answer» C. both A & B | |
| 103. |
Which order of reaction obeys the relation t1/2 = 1/Ka____________________? |
| A. | First order |
| B. | Second order |
| C. | Third order |
| D. | Zero order |
| Answer» C. Third order | |
| 104. |
Which Oxide of Manganese is amphoteric? |
| A. | MnO2 |
| B. | Mn2O3 |
| C. | Mn2O7 |
| D. | MnO |
| Answer» B. Mn2O3 | |
| 105. |
Which sequence of steps is correct for the manufacture of cement ? |
| A. | crushing heating mixing grinding |
| B. | crushing mixing heating grinding and mixing |
| C. | crushing grinding mixing heating |
| D. | mixing heating grinding crushing |
| Answer» D. mixing heating grinding crushing | |
| 106. |
Which set of elements is listed in order of increasing ionization energy ? |
| A. | Sb < As < S < P < Cl |
| B. | Cl < Sb < P < As < S |
| C. | As < Cl < P < S < Sb |
| D. | Sb < As < Cl < S < P |
| Answer» B. Cl < Sb < P < As < S | |
| 107. |
Which set of quantum numbers is not allowed? |
| A. | n=2,l=1,m1=0,ms=+1/2 |
| B. | n=2,l=1,m1=-1,ms=+1/2 |
| C. | n=2,l=0,m1=0,ms=-1/2 |
| D. | n=2,l=2,m1=1,ms=-1/2 |
| Answer» E. | |
| 108. |
Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ? |
| A. | 0.0002M HCI |
| B. | 0.2 mole of NaCI with 0.2 mole of HNO3 |
| C. | 0.4 mole of CH3COOH with 0.4 mole of NaOH |
| D. | 0.4 mole of NH3 with 0.2 mole of HCI |
| Answer» E. | |
| 109. |
Which solids are called true solids _______________? |
| A. | Metallic |
| B. | Amorphous |
| C. | Crystalline |
| D. | Vitreous |
| Answer» D. Vitreous | |
| 110. |
Which specie has unpaired electrons in antibonding molecular orbitals_______________? |
| A. | O2+2 |
| B. | N2-2 |
| C. | B2 |
| D. | O2-2 |
| Answer» C. B2 | |
| 111. |
Which state of matter has the lowest density ? |
| A. | Gas |
| B. | Liquid |
| C. | Solid |
| D. | Plasma |
| Answer» B. Liquid | |
| 112. |
Which statement is consistent with Hunds rule ? |
| A. | Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel |
| B. | The electrons in the same atom cannot have the same four quantum numbers |
| C. | There is maximum of two electrons is an orbital. |
| D. | None |
| Answer» B. The electrons in the same atom cannot have the same four quantum numbers | |
| 113. |
Which statement is incorrect about catalyst___________________? |
| A. | it is used in smaller amount |
| B. | decrease activation energy |
| C. | specific in action |
| D. | it affects specific rate constant |
| Answer» E. | |
| 114. |
Which substance can be used for disinfecting water ? |
| A. | KMnO4 |
| B. | Alums |
| C. | Ozone |
| D. | All |
| Answer» B. Alums | |
| 115. |
Which type of bond is formed by overlap of p orbitals _______________? |
| A. | Pi |
| B. | Sigma |
| C. | Both |
| D. | Neither |
| Answer» D. Neither | |
| 116. |
Who made volume and pressure correction to explain deviation of gases from ideal behaviour ? |
| A. | Clausius |
| B. | Boltzman |
| C. | Charles |
| D. | Vander waal |
| Answer» E. | |
| 117. |
With impurities like P and S the open hearth furnace is lined with ? |
| A. | SiO2 |
| B. | Fe2O3 |
| C. | FeO |
| D. | CaO MgO |
| Answer» E. | |
| 118. |
Without suction pump filtration is __________________? |
| A. | Fast process |
| B. | Slow process |
| C. | Rapid process |
| D. | All are possible |
| Answer» C. Rapid process | |
| 119. |
Zn(s)/Zn+2(aq) 1M | | Cu+2(aq) 1M/Cu(s) is representation of reaction in______________? |
| A. | Daniel cell |
| B. | Downs cell |
| C. | Voltaic cell |
| D. | Nelsons cell |
| Answer» D. Nelsons cell | |
| 120. |
Which of the following statements is false about transition metals? |
| A. | They form complexes |
| B. | They show variable valency |
| C. | All transition metal compounds are paramagnetic |
| D. | They form coloured ions |
| Answer» D. They form coloured ions | |
| 121. |
Which of the following statements about isotopes is correct ? |
| A. | Isotopes with odd atomic number are abundant |
| B. | Isotopes with odd atomic number and even mass number are abundant |
| C. | Isotopes with even atomic number and even mass number are abundant |
| D. | Isotopes with even atomic number and odd mass no are abundant |
| Answer» D. Isotopes with even atomic number and odd mass no are abundant | |
| 122. |
Which of the following solvents would best facilitate an SN2 substitution reaction? |
| A. | Water |
| B. | Hexane |
| C. | Dimethylflormamide |
| D. | Ethanol |
| Answer» D. Ethanol | |
| 123. |
Which of the following solutions of H2SO4 is more concentrated ? |
| A. | 1 Molar solution |
| B. | 1 molal solution |
| C. | 1 normal solution |
| D. | all have same concentration |
| Answer» B. 1 molal solution | |
| 124. |
Which of the following solution has the highest boiling point ? |
| A. | 5.85% NaCl Solution |
| B. | 18.0 % glucose solution |
| C. | 6.0 % urea solution |
| D. | All have same boiling point |
| Answer» B. 18.0 % glucose solution | |
| 125. |
Which of the following solids show anisotropy___________________? |
| A. | Plastic |
| B. | Glass |
| C. | Rubber |
| D. | None of the above |
| Answer» E. | |
| 126. |
Which of the following shows inert pair effect ? |
| A. | boron |
| B. | carbon |
| C. | silicon |
| D. | tin |
| Answer» E. | |
| 127. |
Which of the following shows electrical conduction_____? |
| A. | Potassium |
| B. | Graphite |
| C. | Diamond |
| D. | Sodium |
| Answer» C. Diamond | |
| 128. |
Which of the following set has all species isoelectronic__________________? |
| A. | F – Cl – Br |
| B. | Li+1 – Na+1 – K+1 |
| C. | F – Ne – Na+ |
| D. | H+ – H- – H |
| Answer» D. H+ – H- – H | |
| 129. |
Which of the following represents the correct electronic configuration of VII A group elements in the ground state ? |
| A. | ns2p2 |
| B. | ns2p4 |
| C. | ns2p5 |
| D. | ns2p6 |
| Answer» D. ns2p6 | |
| 130. |
Which of the following reagents will react with both aldehydes and ketones ? |
| A. | Grignard reagent |
| B. | Tollens reagent |
| C. | Fehlings reagent |
| D. | Benedicts reagent |
| Answer» B. Tollens reagent | |
| 131. |
Which of the following reactions may be assoclated with aldehyde and ketone ? |
| A. | nucleophile addition |
| B. | polymerization |
| C. | oxidation |
| D. | all of the above |
| Answer» E. | |
| 132. |
Which of the following reaction is not shown by ketones ? |
| A. | reaction with HCN |
| B. | reaction with NaHSO3 |
| C. | reaction with 2 4 dinitrophenyl hydrazine |
| D. | reaction with Fehling solution |
| Answer» E. | |
| 133. |
Which of the following properties prove that cathode rays are material in nature_________________? |
| A. | they cast shadow |
| B. | they possess momentum |
| C. | they are negatively charged |
| D. | all of the above |
| Answer» C. they are negatively charged | |
| 134. |
Which of the following processes is used for the synthesis of cement ? |
| A. | dry process |
| B. | wet process |
| C. | both |
| D. | none |
| Answer» D. none | |
| 135. |
Which of the following potassium fertilizers are more useful for horticultural crops tobacco & potatoes ? |
| A. | KCI |
| B. | KNO3 |
| C. | K2SO4 |
| D. | KMnO4 |
| Answer» C. K2SO4 | |
| 136. |
Which of the following possesses maximum hydration energy ? |
| A. | Na+ |
| B. | K+ |
| C. | Mg+2 |
| D. | Ca+2 |
| Answer» D. Ca+2 | |
| 137. |
Which of the following points are important in connection with equilibrium constant ? |
| A. | Kc is constant at given temperature |
| B. | Kc is unaffected by change in concentration of reactants or products |
| C. | Kc indicates the extent of reaction but not about the rate of reaction. |
| D. | All of the above |
| Answer» E. | |
| 138. |
Which of the following oxides of iodine is used for quantitative analysis of CO ? |
| A. | I2O4 |
| B. | I4O2 |
| C. | I2O5 |
| D. | All are equally useful |
| Answer» D. All are equally useful | |
| 139. |
Which of the following orbitals has maximum penetration effect? |
| A. | S |
| B. | P |
| C. | d |
| D. | f |
| Answer» B. P | |
| 140. |
Which of the following option is incorrect about gases ? |
| A. | All molecules move with same speed |
| B. | All molecules behave independently |
| C. | PV / RT = n |
| D. | All gases cannot be liquefied through Linds Method |
| Answer» B. All molecules behave independently | |
| 141. |
Which of the following noble gases is not present in atmosphere? |
| A. | Argon |
| B. | Helium |
| C. | Radon |
| D. | Xenon |
| Answer» D. Xenon | |
| 142. |
Which of the following noble gases is abundant in air? |
| A. | Neon |
| B. | Helium |
| C. | Argon |
| D. | Methane |
| Answer» D. Methane | |
| 143. |
Which of the following molecule is polar__________________? |
| A. | CCI4 |
| B. | CO2 |
| C. | BF3 |
| D. | none of the above |
| Answer» E. | |
| 144. |
Which of the following methods is used to estimate hydrogen in an organic compound ? |
| A. | Combustion method |
| B. | Dumas method |
| C. | Kjeldahls method |
| D. | All of the above methods are for different purposes |
| Answer» B. Dumas method | |
| 145. |
Which of the following is used as water disinfectant to avoid the formation of toxic compounds_________________? |
| A. | Cl2 |
| B. | O3 |
| C. | ClO2 |
| D. | both B & C |
| Answer» E. | |
| 146. |
Which of the following is typical transition metal ? |
| A. | Sc |
| B. | Y |
| C. | Cd |
| D. | Co |
| Answer» E. | |
| 147. |
Which of the following is true in the case of Zn-Cu cell ? |
| A. | The flow of electrons takes place from copper to zinc |
| B. | E0red of copper electrode is less than that of zinc electrode |
| C. | Zinc acts as an anode and copper as cathode |
| D. | All are correct |
| Answer» D. All are correct | |
| 148. |
Which of the following is the weakest reducing agent ? |
| A. | HF |
| B. | HBr |
| C. | HC |
| D. | HI |
| Answer» B. HBr | |
| 149. |
Which of the following is the strongest acid ? |
| A. | Water |
| B. | Formic acid |
| C. | Acetic acid |
| D. | Propanoic acid |
| Answer» C. Acetic acid | |
| 150. |
Which of the following is the most suitable catalyst for ammonia synthesis ? |
| A. | Pt |
| B. | ZnO + Cr2O3 |
| C. | Fe in fused mixture of Al2O3 + SiQ2 + MgO |
| D. | All of the above |
| Answer» D. All of the above | |