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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.
| 101. |
Borax is uded as a cleaning agent because on dissolving in water, it givesA. Alkaline SolutionB. Acidic solutionC. Bleaching soluationD. Neutral soluation |
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Answer» Correct Answer - 1 |
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| 102. |
Conc. `HNO_(3)` can be stored in a container made ofA. CuB. AlC. ZnD. Sn |
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Answer» Correct Answer - B |
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| 103. |
Borax is used inA. Qualitative analysisB. WeldingC. Pyrex glassD. All |
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Answer» Correct Answer - D |
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| 104. |
Which of the following is not produced when mixture of borax and `CuSO_(4)` is heated at high temperature ?A. `Cu(BO_(2))_(2)`B. `NaBO_(2)`C. `B_(2)O_(3)`D. `Na_(3)BO_(3)` |
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Answer» Correct Answer - D |
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| 105. |
False statement among the following is:A. Anhydrous `AlCl_(3)` is covalentB. Hydrated `AlCl_(3).6H_(2)O` is ionicC. In solid anhydrous `AlCl_(3)`each aluminimum ion is surrounded by 4 chlorine atomsD. Solid anhydrous `AlCl_(3)` hasj layersed lattice structure. |
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Answer» Correct Answer - C |
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| 106. |
`BF_(3)` exist monomer but not dimer because:A. Boron cannot coordinate with four fluorine atoms to form dimerB. Dimerisation of `BF_(3)` leads to the rehybridiation bond characterC. `BF_(3)` is ionic compoundD. of steric hinderence |
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Answer» Correct Answer - A |
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| 107. |
`BF_(3)` on hydrolysis(partial) forms.A. `H^(+)[BF_(4)]^(-)`B. `HF`C. `B_(2)O_(3) + HF`D. `F_(2) + H_(3)BO_(3)` |
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Answer» Correct Answer - A |
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| 108. |
The element that exhibits negative oxidatio0n state In IIIA group elements isA. BB. AlC. GaD. Tl |
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Answer» Correct Answer - 1 |
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| 109. |
Select the correct statement about the compound `NO[BF_(4)]`A. It has `5 sigma` and `2pi` bondsB. Nitrogen - oxygen bond length is higher than Nitric oxideC. `"B-F"` bond energy in this compound is more than in `BF_(3)`D. It is a diamagnetic substance |
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Answer» Correct Answer - A::D |
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| 110. |
Which of the following statements are correct?A. Boron trioxide with `P_(4)O_(10)` forms `BPO_(4)`B. Aq solution of borax is basic in nature due to anionic hydrolysisC. Aq solution of borax forms acidic buffer with `NaB(OH)_(4)` and `H_(3)BO_(3)`D. Orthoboric acid is weak monobasic Lewis acid. |
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Answer» Correct Answer - A::B::C::D |
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| 111. |
Which of the following reaction is incorrect?A. `BF_(3)(g) + F^(-)(aq) rarr BF_(4)^(-)`B. `BF_(3)(g) + 2H_(2)O rarr [BF_(3)OH]^(-) + H_(3)O^(+)`C. `BCl_(3)(g) + 3EtOH(l) rarr B(OEt)_(3)(l) + 3HCl`D. `BCl_(3) (g) + 2C_(5)H_(5)N(l) rarr Cl_(3)B(C_(5)H_(5)N)_(2)(s)` |
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Answer» Correct Answer - D |
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| 112. |
Which one of the following elements can have both positive and negative oxidation state?A. BB. AlC. GaD. Tl |
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Answer» Correct Answer - 1 |
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| 113. |
Which of the following statements in incorrect ?A. The hydroxide of aluminum is more acidic that that of boronB. The hydroxide of foron is basic whereas than of aluminium is amphotericC. The hydroxide of boron is acisic whereas that of aluminum is amphotricD. The hydroxides of both boron and aluminium are amphotieric |
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Answer» Correct Answer - 3 |
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| 114. |
`PCl_(3)` on hydrolysis givesA. `B_(2)O_(3)` and `HCl`B. `B_(2)H_(6), HCl` and `O_(2)`C. `H_(3)BO_(3)` and `HCl`D. `B_(2)O_(3), H_(2)` and `Cl_(2)` |
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Answer» Correct Answer - C |
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| 115. |
`Al_(2)O_(3)` foemation involes evolution of a large quantity of heat ,so we use "Al"A. As decoxidiserB. In indoor photographyC. In confectionaryD. In themite welding |
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Answer» Correct Answer - 4 |
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| 116. |
In which of the following compounds B-F bond length is shortest?A. `BF_(3)`B. `BF_(4)^(-)`C. `F_(3)B rarr NH_(3)`D. `F_(3)B rarr N(CH_(3))_(3)` |
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Answer» Correct Answer - A |
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| 117. |
Which of the following is correct regarding the hydrolysis of `BX_(3)` (X-hylogen)?A. All `BX_(3)` undergo hydrolysis to produce `B(OH)_(3)` (aq) and `HX`(aq)B. `BF_(3)` does not undergo complete hydrolysis due to formation of `HBF_(4)`C. `BBr_(3)` does not undergo hydrolysis hydrolysis due to formation of `HBF_(4)`D. All the above are correct |
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Answer» Correct Answer - B |
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| 118. |
Boric acid is a very weak acid but in presence of certain organic compounds, it acts as a strong acid. Which one of the following organic compounds can affect such change?A. GlycerolB. Acetic acidC. Ethyl alcoholD. Ethylene |
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Answer» Correct Answer - A |
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| 119. |
When `H_(3)BO_(3)(s)` added in fused `NaOH`, it producesA. `Na_(3)BO_(3)`B. `Na[B(OH)_(4)]`C. `Na_(3)B`D. Boron |
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Answer» Correct Answer - A |
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| 120. |
Which of the following statements is/are correct?A. `AIF_(3)` is insoluble in anhydrous HF but dissolves in the presence of KFB. If `BF_(3)` gas is pased through `Na_(3)AIF_(6)` aluminium trifluoride is precipitateC. `B-F` bond length in `BF_(3)` is less than in `BF_(4)^(-)`D. A mixture of dilute NaOH and aluminium pieces is used to open drain. |
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Answer» Correct Answer - 1234 |
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| 121. |
Correct statement about `Al(BH_(4))_(3)` is :A. Each `BH_(4)` unit forms two hydrogen bridgesB. Two of the t`BH_(4)` units forms one hydrogen bridges and one `BH_(4)` unit forms one hydrogen bridgeC. One `BH_(4)` unit forms two hydrogen bridges and two `BH_(4)` units form one hydrogen bridges.D. Boron form only `2c-2e` bons. |
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Answer» Correct Answer - A |
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| 122. |
Select the correct statement(s) regarding structure of `Al_(2)(CH_(3))_(6)`A. all carbon atoms of `-CH_(3)` groups do not lie in the same planeB. one vacant orbital of each Al-atom is involved in `sp^(3)` hybridisationC. there are only `8 sp^(3)` hybridised atoms are presentD. there are total `48` bonding electrons are available |
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Answer» Correct Answer - A::B::C::D |
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| 123. |
`Al_(2)O_(3) + C + Cl_(2) overset(1273 K)rarrXuarr + Yuarr`. Correct statements regarding X & YA. Both X and Y contain dative bonds in one of their formsB. Both contains Ionic bondC. Both contains OxygenD. Both contains chlorine |
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Answer» Correct Answer - A |
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| 124. |
`Na_(2)B_(4)O_(7)to 2NaOH+A.` The compound A isA. Ortho boric acidB. Metaboric AcidC. Tetra Boric AcidD. Pyroboric acid |
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Answer» Correct Answer - 1 |
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| 125. |
In which of compounds octet is complete and incomplete for all atoms:(C for complete octet and IC for incomplete octet) `Al_(2)Cl_(6) Al_(2)(CH_(3))_(6) AlF_(3) Be_(2)Cl_(4) Be_(2)H_(4)`A. `"IC IC IC C C"`B. `"C IC IC C C"`C. `"C IC C IC IC"`D. `"IC C IC IC IC"` |
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Answer» Correct Answer - C |
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| 126. |
Borax is used as buffer since :A. Divalent metalsB. Heavy metalsC. Light metalD. Metals which form coloured metaborrates |
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Answer» Correct Answer - 4 |
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| 127. |
Borax is used as buffer since :A. Its aqueous solution contains both the weak acid and its saltB. Its aqueous solution contains `H_(3)BO_(3)`, which is a weak acidC. Its aqueous solution contains equal amount of strong acid and its saltD. statement that borax is a buffer is wrong |
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Answer» Correct Answer - A |
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| 128. |
Which of the following is used as control ords in nuclear reactors?A. AlB. GaC. TlD. B |
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Answer» Correct Answer - 4 |
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| 129. |
The glasss- like bead , obtainated on strong heating of borox is a mixture ofA. `NaBO_(2)+B_(2)O_(3)`B. `Na_(2)B_(4)O_(7)+B_(2)O_(3)`C. `H_(2)B_(4)O_(7)+B_(2)O_(3)`D. `Na_(2)B_(4)O_(7)10H_(2)O+B_(2)O_(3)` |
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Answer» Correct Answer - 1 |
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| 130. |
Boron carbide is used :A. DeoxydiserB. In making bullet -proof vestC. Boron -10 to ac=bsorb neutronsD. All the above |
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Answer» Correct Answer - 4 |
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| 131. |
The number of moles of hydrocarbon formed in the hydrolysis of one mole of aluminium carbide is |
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Answer» Correct Answer - 3 |
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| 132. |
Which of following are correctA. `B_(2)H_(6)` is non planarB. `B_(2)H_(6)` undergo symmetrical cleavage with `PF_(3), CO` and `(C_(2)H_(5))_(3)N`C. `B_(2)H_(6)` undergo unsymmetrical cleavage with `NH_(3), CH_(3)NH_(2),(CH_(3))_(2)NH`D. `Ga_(2)Me_(6),Al_(2)Me_(6)` have two type of bonds (`2C - 2e` bonds as well as `3C - 3e` bond) |
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Answer» Correct Answer - A::B::C::D |
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| 133. |
Observe the following reaction sequence carefully and answer the question that follows. `"Boric acid"overset("strong")underset("heat")rarrXoverset(C//Cl_(2))underset(Delta)rarrYoverset(LiAlH_(4))rarrAoverset("excess"NH_(3))underset("low temp")rarrBoverset(200^(@)C)underset(Delta)rarrC` `overset(NH_(4)Cl)underset("heat")rarrDoverset(NaBH_(4))rarr E overset(3HCl)rarr Z` Which of the following statement with respect to the paragraph is incorrect?A. `"X"` on reaction with metal oxide, gives metal metaboratesB. The compounds C and E are identicalC. The hybridization of Boron in E and Z are `SP^(2)` and `SP^(3)` respectivelyD. Compound `"A"` on methlation forms hexa methyl derivative |
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Answer» Correct Answer - D |
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| 134. |
Which of the following statement about `B_(3)N_(3)H_(6)` is correct?A. Like `C_(6)H_(6), B_(3)N_(3)H_(6)` is planar.B. Like `C_(6)H_(6)`, the bonds in borazole are non-polarC. In borazole the hybridization of boron is `sp^(2)` and nitrogen is `sp^(3)` hybridised.D. In borazole the hybridization of boron is `sp^(3)` and nitrogen is `sp^(2)` |
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Answer» Correct Answer - A |
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| 135. |
In diborane, the banana bond is formed betweenA. 2 elecrtroons ,3 atomsB. 2 elecrons , 1atomC. 2electons ,2atomsD. 1 electron ,2 aatoms |
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Answer» Correct Answer - 1 |
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| 136. |
Wich of the following compound is not a boraneA. `B_(5)H_(9)`B. `B_(5)H_(10)`C. `B_(5)H_(11)`D. `B_(6)H_(10)` |
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Answer» Correct Answer - 2 |
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| 137. |
Solid oxy acids of boron areA. `H_(3)BO_(3)`B. `HBO_(2)`C. `H_(2)B_(4)O_(7) `D. All |
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Answer» Correct Answer - 4 |
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| 138. |
Match the species given column I with prooperties given in column II |
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Answer» Correct Answer - a-q;b-r;c-p;d-s |
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| 139. |
Two maintain the alminium vessels for long life which of the following precautions must be taken?A. Aluminium vessels should not be stored with ordinary water for overnightB. Aluminium vessels should not be washed with washing powedersC. Aluminium vessles should be coated with oxide layer by anodic oxidationD. They should be dipped in conc `HNO_(3)`. |
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Answer» Correct Answer - 1234 |
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| 140. |
Which amongst the foolowing is also called as a sesqui oxideA. `B_(2)O_(3)`B. `Al_(2)O_(3)`C. `Tl_(2)O_(3)`D. All |
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Answer» Correct Answer - 4 |
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| 141. |
`AlCl_(3)` on hydrolysis givesA. `AlCl_(3).H_(2)O`B. `Al(OH)_(3)`C. `Al_(2)O_(3)`D. `AlCl_(3).6H_(2)O` |
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Answer» Correct Answer - 2 |
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| 142. |
Anhydrrous `AlCl_(3)` isA. CovaentB. IonicC. Covalent and basicD. Covalent and neutral |
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Answer» Correct Answer - 1 |
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| 143. |
Heating an aqueous solution of aluminium chloride to dryness will giveA. `AlCl_(3)`B. `Al_(2)Cl_(6)`C. `Al_(2)O_(3)`D. `Al_(2)(OH)Cl_(2)` |
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Answer» Correct Answer - C |
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| 144. |
Why is a solution of aluminium chloride acidic?A. Chloride ions react with water to form hydrochloric acidB. Aluminium ions have a large `"charge"//"surface"` area ratioC. The `H-O` bonds are weaker in `[Al(H_(2)O)_(6)]^(3+)` than in `H_(2)O`D. The H-O bonds are stronger in `[Al(H_(2)O)_(6)]^(3+)` than in `H_(2)O` |
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Answer» Correct Answer - B::C |
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| 145. |
In `K[B_(5)O_(6)(OH)_(4)]`, the number of tetrahedral units is /are, |
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Answer» Correct Answer - 1 |
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| 146. |
Which of the following statements is/are correct?A. The bond energy of B-X is more in `BX_(3)` than in [`BX_(3)` Pyridine] adduct.B. When `BF_(3)` is added to `Na_(3)AlF_(6), NaBF_(4)` is formedC. Borazole contains polar bonds.D. Inorganic benzene is more reactive than benzene |
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Answer» Correct Answer - A::B::C::D |
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| 147. |
The liquified metal expanding on solidification is :A. GaB. AlC. ZnD. Cu |
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Answer» Correct Answer - 1 |
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| 148. |
(I) `A +2HCI+5H_(2)Oto 2NaCI+X` (II) `Xunderset(370 K)overset(Delta)toHBO_(2)underset( gt 370 K)overset(Delta)toZ`A. `B_(2)H_(6),H_(3)BO_(3),B_(2)O_(3)`B. `B(OH)_(3),B_(2)O_(3),`BoraxC. `B(OH)_(3),H_(2)B_(4)O_(7),`BoraxD. `Borox, B(OH)_(3),B_(2)H_(6)` |
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Answer» Correct Answer - 2 |
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| 149. |
Boron forms a number of hydrides having general formulae `B_(n)H_(n+4)` and `B_(n)H_(n+6)`. These hydrides called boranes. The simplest hydride of boron is diborane. Boranes contains special types of bonds known as multi centre bonds. Boranes have high heat of combustion Diborane liberates `H_(2)` gas when it is treated withA. `HCl` in the presence of anhydrous `AlCl_(3)`B. `H_(2)O`C. `KOH_(aq)`D. All are correct |
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Answer» Correct Answer - D |
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| 150. |
`Ca_(2)B_(6)O_(11) + NA_(2)CO_(3) overset("Fusted")rarr(A) + (B) + CaCO_(3)` `(A)+CO_(2)rarr(B)+Na_(2)CO_(3)` `(B) + Conc.HClrarr NaCl+"Acid"(C)` `(C)overset("Strongly")underset("heated")rarr(D)` `(D)+CuSO_(4)overset("Heated")underset("Inflame")rarr"Blue colured"(E)"Compound"` Compound (A) is :A. `NaBO_(2)`B. `Na_(2)B_(4)O_(7)`C. `Na_(3)BO_(3)`D. `NaOH` |
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Answer» Correct Answer - A |
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