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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1101. |
Which compound will liberate oxygen when reacted with water?A. `Na_(2)O`B. `Cs_(2)O_(2)`C. `KO_(2)`D. `Na_(2)O_(2)` |
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Answer» Correct Answer - C |
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| 1102. |
Sodium carbonate reacts with `SO_(2)` in aqueous medium to giveA. `NaHSO_(3)`B. `Na_(2)S_(2)O_(3)`C. `NaHSO_(4)`D. `Na_(2)SO_(4)` |
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Answer» Correct Answer - a When `SO_(2)` is passed in the sodium carbonate solution, `CO_(2)` gas is avolved and sodium carbonate is converted into `NaHSO_(3)` (sodium bisulphite). `Na_(2)CO_(3)+2SO_(2)+H_(2)Orarr2NaHSO_(2)+CO_(2)` |
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| 1103. |
`Na_(2)CO_(3)+HCl to ………. + …….. + ………` The products in the above reaction are respectivelyA. `NaCl + H_(2)O + CO_(2)`B. `NaCl+H_(2)O_(2)+O_(2)`C. `H_(2)CO_(3) + NaCl + O_(2)`D. `Na_(2)O_(2) + HCl + CO_(2)` |
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Answer» Correct Answer - A `Na_(2)CO_(3) + 2HCl to 2NaCl + H_(2)O + CO_(2) uarr` |
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| 1104. |
Sodium carbonate reacts with `SO_(2)` in aqueous medium to giveA. `NaHSO_(3)`B. `Na_(2)SO_(3)`C. `NaHSO_(4)`D. `Na_(2)SO_(4)` |
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Answer» Correct Answer - A `Na_(2)CO_(3)+H_(2)O+2SO_(2) rarr 2 NaHSO_(3)+CO_(2)` |
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| 1105. |
The pair of compounds which cannot exist in solution is:A. `Na_(2)CO_(3) and NaHCO_(3)`B. `NaHCO_(3) and NaOH`C. `Na_(2)CO_(3) and NaOH`D. `NaOH and NaCl` |
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Answer» Correct Answer - B `NaHCO_(3) ` and NaOH both reacts to form `Na_(2)CO_(3)` `NaHCO_(3) + NaOH to Na_(2)CO_(3) * H_(2)O` |
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| 1106. |
The pair of compounds which cannot exist in solution is:A. `NaHCO_(3)` and `H_(2)O`B. `Na_(2)CO_(3)` and `NaOH`C. `NaHCO_(3)` and `NaOH`D. `NaHCO_(3)` and `Na_(2)CO_(3)` |
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Answer» Correct Answer - C `NaHCO_(3)` is an acid salt. It reacts with `NaOH` to form salt and water. `NaHCO_(3) + NaOH to Na_(2)CO_(3) + H_(2) O` |
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| 1107. |
The pair of compounds which can exist together in aqueous solution isA. `Na_(2)CO_(3)` and `NaHCO_(3)`B. `K_(2)Cr_(2)O_(7)` and `NaOH`C. `NaHCO_(3)` and `NaOH`D. none of these |
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Answer» Correct Answer - A `HCO_(3)^(-)` in presence of `OH^(-)` is converted to `CO_(4)^(2-),Cr_(2)O_(7)^(2-)` in presence of `OH^(-)` is converted to `CrO_(4)^(2-)`. |
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| 1108. |
Sodium cannot be extracted by the electrolysis of brine solution because`:`A. sodium liberated reacts with water to produce `NaOH+H_(2)`B. sodium being more electropositive than hydrogen, `H_(2)` is liberated at cathode and not sodiumC. electrolysis cannot take place with brine soulutionD. none of the above |
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Answer» Correct Answer - B It is a reason for given fact. |
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| 1109. |
Sodium hydroxide is manufacture by the electrolysis of brine solution. The reaction by `-` products are `:`A. `Cl_(2)` and `H_(2)`B. `Cl_(2)` and `Na-Hg`C. `Cl_(2)` and `NaCl`D. `Cl_(2)` and `O_(2)` |
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Answer» Correct Answer - 1 `NaCl("conc.")hArr Na^(+)+Cl^(-)" "," "H_(2)OhArr H^(+)+OH^(-)` At cathode `:2H^(+)+2e^(-)rarrH_(2)uarr` At anode `:2Cl^(-)rarrCl_(2)uarr+2e^(-)` `Na^(+)+OH^(-)rarrNaOH` |
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| 1110. |
The pair of compounds which cannot exist in solution is:A. `NaHCO_(3)` and `NaOH`B. `Na_(2)CO_(3)` and `NaHCO_(3)`C. `Na_(2)CO_(3)` and `NaOH`D. `NaHCO_(3)` and `NaCl` |
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Answer» Correct Answer - A `underset("Acid salt")(NaHCO_(3))+underset("Alkali")(NaOH)rarr Na_(2)CO_(3)+H_(2)O` |
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| 1111. |
`NaOH` is prepared by the electrolysis of :A. aqueous solution of sodium chloride with platinum electrodesB. molten sodium chloride with graphite anode and iron cathodesC. sodium carbonate with platinum electrodesD. sodium carbonate with nickel electrodes |
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Answer» Correct Answer - A At anode `: 2 Cl^(-) rarr Cl_(2)+2e` At cathode `: 2 H^(+)+2e rarr H_(2)` |
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| 1112. |
Sodium nitrate decomposes above-`800^(@)C` to giveA. `N_(2)`B. `O_(2)`C. `NO_(2)`D. `Na_(2)O` |
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Answer» Correct Answer - B `2NaNO_(3) overset("Heat")(to) 2NaNO_(2) + O_(2)` |
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| 1113. |
Choose the incorrect statement in the following :A. BeO is almost insoluble but `BeSO_(4)` is soluble in waterB. BaO is soluble but `BaSO_(4)` is insoluble in waterC. Both Li and Mg form solid hydrogen carbonatesD. Both LiCl and `MgCl_(2)` are deliquescent |
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Answer» Correct Answer - D Both Li and Mg do not form solid hydrogen carbonates . |
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| 1114. |
One mole of un known compound was treated with excess of water and resulted in the evolution of two moles of a readily combustle gas . The resulting solution was treated with `CO_(2)` and resulted in the formation of white turbidity . The unknown compound isA. `Ca`B. `CaH_(2)`C. `Ca(OH)_(2)`D. `Ca(NO)_(2)` |
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Answer» Correct Answer - B `underset(" 1 mole") (Ca) + 2 H_(2)O to Ca(OH)_(2) + underset("1 mole")(H_(2))` `underset("1 mole")(CaH_(2)) + 2 H_(2) O to Ca(OH)_(2) + underset("2 moles")(2 H_(2))` `Ca(OH)_(2) + CO_(2) underset(" White turbidity")(CaCO_(3)) + H_(2)O` Since both Ca and `CaH_(2)` react with `H_(2)O` to produce combustible `H_(2)` gas but 1 mole of `CaH_(2)` produces two moles of `H_(2)` , therefore , option (b) is correct . |
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| 1115. |
Among the following compound that is readily soluble in water isA. `BeSO_(4)`B. `CaSO_(4)`C. `SrSO_(4)`D. `BaSO_(4)` |
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Answer» Correct Answer - A Due to small size of `Be^(2+)` ions , the hydration enthalpy of `BeSO_(4)` is much higher than its lattice enthalpy . Hence , `BeSO_(4)` ios readily soluble in `H_(2)O`. |
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| 1116. |
Which of the following compounds are readily soluble in water ?A. `BeSO_(4)`B. `MgSO_(4)`C. `BaSO_(4)`D. `SrSO_(4)` |
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Answer» Correct Answer - A::B Solubility decreases down the group as hydration enthalpy decreases but lattice enthalpies remain almost costant . Thus , `BeSO_(4)` and `MgSO_(4)` are soluble in water . |
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| 1117. |
Alkaline earth metals are denser than alkali metals, because metallic bonding in alkaline earth metals isA. StrongerB. weakerC. not presentD. volatile |
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Answer» Correct Answer - A They are denser than alkali metals because they can be packed more tightly to their greater charge and smaller radii. |
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| 1118. |
The correct order of ionic character of oxides of alkali earth metal:-A. `MgO gt CaO gt SrO gt BaO`B. `BaO gt SrO gt CaO gt MgO`C. `CaO gt SrO gt BaO gt MgO`D. `SrO gt BaO gt MgO gt CaO` |
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Answer» Correct Answer - B Ionic character `prop` size of cation |
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| 1119. |
The correct order of decreasing ionic character isA. `BeCl_(2) lt MgCl_(2) lt CaCl_(2) lt BaCl_(2)`B. `BeCl_(2) lt MgCl_(2) lt BaCl_(2) lt CaCl_(2)`C. `BeCl_(2) lt BaCl_(2) lt MgCl_(2) lt CaCl_(2)`D. `BaCl_(2) lt CaCl_(2) lt MgCl_(2) lt BeCl_(2)` |
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Answer» Correct Answer - A `BeCl_(2) lt MgCl_(2) lt CaCl_(2) lt BaCl_(2)` As we go down the group I.E. decrease. Hence ionic character increases. |
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| 1120. |
Whivh of the following hydroxide is insoluble in water ?A. `Be(OH)_(2)`B. `Mg(OH)_(2)`C. `Ca(OH)_(2)`D. `Ba(OH)_(2)` |
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Answer» Correct Answer - A The solubility of hydroxides of alkaline earth metals in water increases on moving down the group. |
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| 1121. |
The alkali metals form salt like hydrides by the direct synthesis at elevated temperature. The termal stability of these hydrides decreases in which of the following orders ?A. `NaH gt LiH gt KH gt RbH gt CsH`B. `LiH gt NaH gt KH gt RbH gt CsH`C. `Csh gt RbH gt KH gt NaH gt LiH`D. `KH gt NaH gt LiH gt CsH gt RbH` |
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Answer» Correct Answer - B The ionic character of MH bond increases from Li to Cs in alkali metals. The corresponding thermal stability decreases. Therefore, the correct decreasing order is as given in option (b) |
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| 1122. |
The alkali metals form salt like hydrides by the direct synthesis at elevated temperature. The termal stability of these hydrides decreases in which of the following orders ?A. `KH gt NaH gt LiH gt CsH gt RbH`B. `NaH gt LiH gt KH gt RbH gt CsH`C. `LiH gt NaH gt KH gt RbH gt CsH`D. `CsH gt RbH gt KH gt NaH gt LiH` |
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Answer» Correct Answer - C The tendency to form their hydrides, basic character and stability decreases from `Li` to `Cs` since the electropositive character decreases fro `Cs` to `Li`. |
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| 1123. |
Which of the following compounds on hydrolysis gives acetylene ?A. `Al_(4)C_(3)`B. `Mg_(3)N_(2)`C. `CaC_(2)`D. `CaH_(2)` |
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Answer» Correct Answer - C `CaC_(2) +2H_(2)O rarr Ca(OH)_(2)+C_(2)H_(2)` |
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| 1124. |
Magnesium chloride dissovles in water to form :A. hydrated `MgCl_(2)` moleculesB. hydrated `Mg^(2+)` ions and hydrate `Cl^(-)` ionsC. hydrated `Mg^(2+)` ions and hydrated `Cl_(2)^(2-)` ionsD. Hydrated `Mg` atoms and hydrated `Cl_(2)` molecules |
| Answer» Correct Answer - B | |
| 1125. |
Which of the following is used as an antacid?A. `MgO`B. `MgCO_(3)`C. `Mg(OH)_(2)`D. `MgSO_(4)` |
| Answer» Correct Answer - C | |
| 1126. |
The main source of magnesium chloride isA. CarnalliteB. MagnetiteC. LimoniteD. Siderite |
| Answer» Correct Answer - A | |
| 1127. |
Amongest the following, select the element, with highest ionization enthalpyA. Sodium amideB. PotassiumC. BerylliumD. Magnesium |
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Answer» Correct Answer - C The element be has the highest ionization enthalpy. Actually, ionization enthalpies in general, increase along a period and decrease down a group. |
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| 1128. |
Which of the following metals forms grignard reagent?A. MagnesiumB. CalciumC. BariumD. Strontium |
| Answer» Correct Answer - A | |
| 1129. |
Which of the following has the highest ionization potentialA. MagnesiumB. BariumC. StrontiumD. Calcium |
| Answer» Correct Answer - A | |
| 1130. |
Which of the following statement(s) is / are correct?A. Milk of lime is suspension of `Ca(OH)_(2)` in water:B. Lime water is a clear solution of `Ca(OH)_(2)` in water.C. Baryta water is a clear solution of `Ba(OH)_(2)`D. Nitrolim is the mixture of `CaCN_(2)` and carbon |
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Answer» Correct Answer - A::B::C::D |
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| 1131. |
Washing soda isA. `Na_(2)CO_(3) . 7H_(2)O`B. `Na_(2)CO_(3) . 10H_(2)O`C. `Na_(2)CO_(3) . 3 H_(2)O`D. `Na_(2)CO_(3)` |
| Answer» Correct Answer - B | |
| 1132. |
In the manufacture of sodium hydroxide by product obtained isA. `O_(2)`B. `Cl_(2)`C. `Na_(2)CO_(3)`D. NaCl |
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Answer» Correct Answer - B |
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| 1133. |
The potassium hydroxide is used in the manufacture of -A. CementB. GlassC. Soft soapD. Both (1) & (2) |
| Answer» Correct Answer - C | |
| 1134. |
Aqueous solution of sodium carbonate is alkaline due toA. Hydrolysis of `Na^(+)`B. Hydrolysis of `CO_(3)^(2-)`C. Hydrolysis of both `Na^(+)` and `CO_(3)^(2-)`D. Hydration of `Na^(+)` |
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Answer» Correct Answer - B |
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| 1135. |
Chemical name of soda ash isA. sodium bicarbonateB. sodium hydroxideC. sodium carbonateD. None of these |
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Answer» Correct Answer - C `Na_(2)CO_(3)` (anhydrous) is called soda ash, sodium. Bicarbonate is called baking soda and sodium hydroxide is called caustic soda. |
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| 1136. |
Backing power does not containA. NaOHB. `NaHSO_(4)`C. StarchD. `NaHSO_(4)` |
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Answer» Correct Answer - B |
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| 1137. |
The sodium hydroxide is used in the manufacture ofA. SoapsB. DyesC. RayonD. All of these |
| Answer» Correct Answer - D | |
| 1138. |
An aqueous solution of sodium carbonate is alkaline because sodium carbonate is a salt ofA. weak acid andweak baseB. strong acid and weak baseC. weak acid and strong baseD. strong acid and strong base |
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Answer» Correct Answer - c An aqueous solution of sodium carbonate is alkaline in nature because it is a salt of weak acid and strong base. |
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| 1139. |
The chemical formula of soda ash isA. NaOHB. `Na_(2)CO_(3^.)5H_(2)O`C. `Na_(2)CO_(3)`D. `Na_(2)CO_(3^.)10H_(2)O` |
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Answer» Correct Answer - C |
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| 1140. |
Sodium hydroxide is produced on a large scaleA. by the hydrogen of `Na_(2)CO_(3)`B. by the electroysi of an aqueous solution of NaCl using a marrcuty cathode cell.C. by adding water to sodium oxideD. by reactiong sodium with water |
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Answer» Correct Answer - B |
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| 1141. |
Sodium carbonate in aqueous solution isA. AcidicB. AmphotericC. NeutralD. Basic |
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Answer» Correct Answer - D |
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| 1142. |
Sodium hydrogen is a strong base and react with several substances. Which of the following reaction of sodium hydroxide is redox reactionA. `NaOH+NH_(4)Cl to NaCl+H_(2)O+NH_(3)`B. `ZnSO_(4)+4NaOHtoNa_(2)[Zn(OH)_(4)]+Na_(2)SO_(4)`C. `2NaOH+Si+H_(2)OtoNa_(2)SiO_(3)+H_(2)`D. `FeSO_(4)+2NaOHtoFe(OH)_(2)+Na_(2)SO_(4)" "Na_(2)CO_(3)andNaHCO_(3)` |
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Answer» Correct Answer - C |
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| 1143. |
Which is efflorescent of the following ?A. Washing sodaB. Soda ashC. Caustic sodaD. Caustic potash |
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Answer» Correct Answer - A |
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| 1144. |
`H_(2)SO_(4)` is added to `20%` cold aqueous solution of `"BaO"_(2)`. The product formed isA. `H_(2)O_(2)`B. BaOC. `Ba(OH)_(2)`D. `H_(2)SO_(5)` |
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Answer» Correct Answer - 1 |
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| 1145. |
Statement-1: BaO is an amphoteric oxide. Statement -2: BaO reacts with HCl solution to produce `BaCl_(2)` solution.A. Both Statement -1 and Statement-2 are true and Statement-2 is the correct explanation of Statement -1B. Both Statement -1 and Statement-2 are true and Statement-2 is the not correct explanation of Statement -1C. Statement-1 is true but Statement -2 is falseD. Statement-1 is false but Statement -2 is true |
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Answer» Correct Answer - D |
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| 1146. |
Which of the following statements is true for all the alkali metals ?A. Their nitrate decomposes on heating to give the corresponding nitrites and oxygen.B. Their chlorides are deliquescent and crystallize as hydrates.C. They react with water to form hydroxide and hydrogen.D. They readily react with halogens to form ionic halides. `M^(+)X^(-)` |
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Answer» Correct Answer - C |
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| 1147. |
Statement-1:NaCl and KCl are anhydrous but `MgCl_(2)` and `CaCl_(2)` exists as `MgCl_(2).6H_(2)O` and `CaCl_(2).6H_(2)O` respectively. Statement-2: Hydration energies of group-2 ions are greater than those of group-1 ionsA. Both Statement -1 and Statement-2 are true and Statement-2 is the correct explanation of Statement -1B. Both Statement -1 and Statement-2 are true and Statement-2 is the not correct explanation of Statement -1C. Statement-1 is true but Statement -2 is falseD. Statement-1 is false but Statement -2 is true |
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Answer» Correct Answer - A |
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| 1148. |
Which of the following is obtained on hydrolysis of `Mg_(2)C_(3)` ?A. MethaneB. EthaneC. CthyneD. Allylene |
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Answer» Correct Answer - 4 |
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| 1149. |
`Mg_(3)N_(2) + H_(2)O to` |
| Answer» `Mg_(3)N_(2) + 6H_(2)O to 3Mg (OH)_(3) + 2NH_(3)` | |
| 1150. |
The following compounds have been arranged in order of their increasing thermal statbilties . Identify the correct order . `K_(2)CO_(3) (I)" "MgCO_(3) (II)` `CaCO_(3) (III)" "BeCO_(3) (IV)`A. `I lt II lt III lt IV`B. `IV lt II lt III lt I`C. `IV lt II lt I lt III`D. `II lt IV lt III lt I` |
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Answer» Correct Answer - B |
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