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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.
| 6801. |
Complete the following reactions : (i) CH_(3)CH_(2)OHoverset"Alkaline"underset(KMnO_(4)+Heat)rightarrow? (ii) 2Na + 2CH_(3)CH_(2)OH rightarrow ? + ? (iii) CH_(3)COOH + CH_(3)CH_(2)OHoverset"acid" rightarrow? |
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Answer» Solution :(i) `CH_(3)CH_(2)OH overset("Alkaline")underset(KMnO_(4)"+HEAT")rightarrowCH_(3)COOH` (ii) `2Na+2CH_(3)CH_(2)OH rightarrow 2CH_(3)CH_(2)ONa+H_(2)` (iii) `CH_(3)COOH+CH_(3)CH_(2)OH overset"acid"rightarrowCH_(3)CO +H_(2)O_2(CH_(2)CH_(3))` |
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| 6802. |
Complete the following reactions. (a)PCI_(3)+Cl_(2)to? (b)SiO_(2)+?toCaSiO_(3) (C )2HgOoverset(Delta)to?+O_(2) (d)CaCO_(3)overset(Delta)to?+CO_(2) (e ) Ca(OH)_(2)overset(CO_(2))to?+H_(2)O |
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Answer» SOLUTION :(a)`PCl_(3)+Cl_(2)toPCl_(5)` (b)`SiO_(2)+CaOtoCaSiO_(3)` (C )`2HgOoverset(Delta)to2Hg+O_(2)` (d)`CaCO_(3)overset(Delta)toCaO+CO_(2)` ( e)`CA(OH)_(2)overset(CO_(2))to toCaCO_(3)+H_(2)O` |
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| 6803. |
Complete the following reaction : CH_(3)COOH+NaHCO_(3)rightarrow |
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Answer» Solution :`CH_(3)COOH + NaHCO_(3)RIGHTARROW CH_(3)COONa` `+ H_(2)O+CO_(2)` |
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| 6804. |
Complete the followingreaction . Al_2O_3 underset(900-950^(@)C)overset(Delta)to "_______" +O_2 |
| Answer» SOLUTION :`Al_2O_3 UNDERSET(900-950^(@)C)OVERSET(DELTA)to 4Al+O_2` | |
| 6805. |
Complete the following: Na_(2)SO_(4)(aq)+BaCl_(2)(aq)to _____ + _____ |
| Answer» SOLUTION :`BaSO_(4)(s)` | |
| 6806. |
Complete the following: In a ______ acid, the number of the replaceable H atoms in its molecule is two. |
| Answer» SOLUTION :DIPROTIC | |
| 6807. |
Complete the following equations : (i) CH_(3)COOC_(2)H_(5)overset(NaOH)rightarrow (ii) CH_(3)COOH+NaHCO_(3)rightarrow CH_(4)CI_(2)overset"Sunlight"righatrrow |
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Answer» Solution :(i) `CH_(3)COOHC_(2)H_(5)OVERSET"NaOH"rightarrowC_(2)H_(5)OHunderset(+CH_(3)COONa)` `CH_(3)COOH+NaHCO_(3)rightarrowCH_(3)COONaunderset(+CO_(2))(+H_(2)O)` (iii) `CH_(4)+CI_(2)overset"SUNLIGHT"rightarrowCH_(3)CI+HCI` |
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| 6808. |
Complete the following cross-word puzzle : Across : (1) An element with atomic number 12 (3) Metal used in making cans and member of group 14. A lustrous non-metal which has 7 electrons in its outermost shell. Down: (2) Highly reactive and soft metal which imparts yellow colour when subjected to flame and is kept in kerosene. (5) The first element of second period. (6) An element which is used in making fluorescent bulbs and is second member of group 18 in the modern periodic table. (7) A radioactive element which is the last member of halogen family. Metal which is an important constituent of steel and forms rust when exposed to moist air. (9) The first metalloid in modern periodic table whose fibres are used in making bullet- proof vests. |
Answer» SOLUTION :
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| 6809. |
Complete the following chemical equations : CH_(3)COOH + C_(2)H_(5)OH overset(Conc. H_(2)SO_(4))rarr |
| Answer» SOLUTION :`CH_(3)COOH + C_(2)H_(5)OH OVERSET(Conc. H_(2)SO_(4))rarr underset("Ethyl ACETATE")(CH_(3)COOC_(2)H_(5) + H_(2)O` | |
| 6810. |
Complete the following chemical equation of a chemical reaction : 2FeSO_(4)overset("Heat")(to)Fe_(2)O_(3)+ . . . . + . . . . |
| Answer» SOLUTION :`2FeSO_(4)overset("HEAT")(to)Fe_(2)O_(3)+SO_(2)+SO_(3)` | |
| 6811. |
Complete the following chemical equation : 2FeSO_(4)overset("heat")(to)Fe_(2)O_(3) +_________+________ |
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Answer» Solution :The complete EQUATION is : `2FeSO_(4)(s)OVERSET("HEAT")(to)Fe_(2)O_(3)(s)+SO_(2)+SO_(3)`. |
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| 6812. |
Complete the following: An acid is a substance that contains ______ H atoms. |
| Answer» SOLUTION :ionisable | |
| 6813. |
Complete thechemical reactionNa_(2)CO_(3) +CaCl_(2) to ………….+………….. |
| Answer» SOLUTION :`CaCO_(3)+ 2NaCl` | |
| 6814. |
Complete thechemical reactionFe_(2)O_(3)+2Al to …………+ …………….. |
| Answer» SOLUTION :`Al_(2)O_(3) +2FE` | |
| 6815. |
Complete thechemical reactionPb(NO_(3))_(2)+2KI to …………………+ ……………….. |
| Answer» SOLUTION :`PBI_(2)+ 2KNO_(3)` | |
| 6816. |
Complete thechemical reaction Zn+2HCl to ………………..+ ……………………. |
| Answer» SOLUTION :`ZnCl_(2)+H_(2)` | |
| 6817. |
Complete thechemical reaction K_(2)SO_(4) +BaBr_(2) to …………..+ …………. |
| Answer» SOLUTION :`2KBr+ BaSO_(4)` | |
| 6818. |
Complete thechemical reactionAgNO_(3)+NaCl to ……………..+…………… |
| Answer» SOLUTION :`AGCL+ NaNO_(3)` | |
| 6820. |
Complete thechemical reactionCuO+ H_(2) overset("Heat")to ………..+…………. |
| Answer» SOLUTION :`CU+ H_(2)O` | |
| 6821. |
Complete thechemical reaction Fe+ Cu(SO_(4)) to ……………….+ …………….. |
| Answer» SOLUTION :`FeSO_(4 + CU` | |
| 6822. |
Complete thechemical reaction6CO_(2)+6H_(2)O underset("Chlorophyll")overset("Sunlight")to …………..+……….. |
| Answer» Solution :`C_(6)H_(12)O_(6)+ 6O_(2)` | |
| 6824. |
Complete thechemical reaction2Pb(NO_(3))_(2) overset("Heat")to ……………+……………..+…………… |
| Answer» SOLUTION :`2PbO+ 4NO_(2) +O_(2)` | |
| 6826. |
Complete thechemical reaction2HNO_(3)+ Ca(OH)_(2) to ………….+ …………. |
| Answer» SOLUTION :`CA(NO_(3))_(2)+ H_(2)O` | |
| 6827. |
Complete thechemical reaction2AgCl overset("Sunlight")to ………….+………….. |
| Answer» SOLUTION :`2AG+ Cl_(2)` | |
| 6828. |
Complete combustion of hydrocarbon produces |
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Answer» `CO + H_2O ` |
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| 6829. |
Complete combusion of a hydrocarbon gives. |
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Answer» CO+`H_(2)O` |
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| 6830. |
Complete and balance the following equations : Pb(NO_(3))_(2)+KIto |
| Answer» SOLUTION :`PB(NO_(3))_(2)+2KItoPbI_(2)+2KNO_(3)` | |
| 6831. |
Complete and balance the following equations : NH_(3)+O_(2)to |
| Answer» SOLUTION :`4NH_(3)+5O_(2)to4NO+6H_(2)O` | |
| 6832. |
Complete and balance the following equations : NaOH+H_(2)SO_(4)to |
| Answer» SOLUTION :`2NaOH+H_(2)SO_(4)toNa_(2)SO_(4)+2H_(2)O` | |
| 6833. |
Complete and balance the following equations : (i) HgCl_(2)+KI to (ii) Al+Cr_(2)O_(3) to (iii) CuSO_(4)+H_(2)S to (iv) (NH_(4))_(2)Cr_(2)O_(7)overset(Delta)(to) |
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Answer» SOLUTION :(i) `HgCl_(2)(aq)+2KI(aq) to HgI_(2)(aq)+2KCL(aq)` (ii) `2Al(s)+Cr_(2)O_(3)(s)overset(Delta)(to)Al_(2)O_(3)(s)+2Cr(l)` (iii) `CuCO_(4)(aq)+H_(2)S(g) to CuS(s)+H_(2)SO_(4)(aq)` (iv) `(NH_(4))_(2)Cr_(2)O_(7)(s)overset(Delta)(to)N_(2)(g)+4H_(2)O(g)+Cr_(2)O_(3)(s)` |
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| 6834. |
Complete and balance the following equation : Fe_(2)O_(3)+Al to |
| Answer» SOLUTION :`Fe_(2)O_(3)(s)+2Al(s)toAl_(2)O_(3)(s)+2Fe(s)` | |
| 6835. |
Complete and balance the following chemical equations: (i) NaOH(aq)+Zn(s) to (ii) CaCO_(3)(s)+H_(2)O(l)+CO_(2)(g) to (iii) HCl(aq)+H_(2)O(l) to |
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Answer» Solution : (i) `2NAOH(aq)+Zn(s) to Na_(2)ZnO_(2)(aq)+H_(2)(g)` (II) `CaCO_(3)(s)+H_(2)O(l)+CO_(2)(g) toCa(HCO_(3))_(2)(aq)` (iii) `HCl(aq)+H_(2)O(l) to H_(3)O^(+)(aq)+Cl^(-)(aq)` |
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| 6836. |
Complete and balance the following chemical equations:(i) CaCO_(3)+HCl(ii) Al+HCl (iii) MnO_(2)+HCl |
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Answer» Solution :(i) `CaCO_(3)(S)+2HCl(aq)rarrCaCl_(2)(S)+H_(2)O(L)+CO_(2)(g)` (ii) `2Al(S)+6HCl(aq)rarr 2AlCl_(3)(aq)+3H_(2)(g)` (iii) `MnO_(2)+4HCl(aq)rarr MnCl_(2)+2H_(2)O(l)+Cl_(2)(g)` |
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| 6837. |
Complete and balance thechemical equation:CH_4 + O_2 to CO_2 + "______" +heat |
| Answer» SOLUTION :`CH_4 + O_2 to CO_2 + 2H_2O ` + HEAT | |
| 6838. |
Complete and balance thechemical equation:_____ to C_2H_4 + H_2O |
| Answer» SOLUTION :`C_2H_5OH to C_2H_4 + H_2O` | |
| 6839. |
Complete and balance thechemical equation:CH_2= CH_2 + Br_2 to |
| Answer» SOLUTION :`CH_2 = CH_2 + Br_2 to BrH_2C - CH_2 BR` | |
| 6840. |
Complete and balance thechemical equation:CaC_2 + 2H_2O to "_____"+ Ca (OH)_2 |
| Answer» SOLUTION :`CaC_2+ 2H_2Oto C_2H_2 + CA(OH)_2` | |
| 6841. |
Complete and balance thechemical equation:C_2H_4+" _____" to C_2H_6 |
| Answer» SOLUTION :`C_2H_4 + H_2 to C_2H_6` | |
| 6842. |
Complete and balance thechemical equation:C_2H_2 + 2Br_2 to _____ |
| Answer» SOLUTION :`C_2H_2 + 2Br_2 to Br_2HC - CHBr_2` | |
| 6843. |
Complete and balance thechemical equation:"_____" + 5O_2 to 4CO_2 + 2H_2O+ heat |
| Answer» SOLUTION :`2C_2H_2+5O_2 to 4CO_2 + 2H_2O `+ HEAT | |
| 6844. |
Compared to the mass of lightest nuclei, the mass of an electron is only (approximately) |
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Answer» `1/80` |
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| 6845. |
Compare the shapes of the meniscus of water in a glass tube and in wax coated glass tube. Give an appropriate reason. |
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Answer» Solution :(i) composition and nature of GLASS and wax (II) comparison of TYPES of forces existing between the molecules of WATER, glass and water and wax (iii) relation between type of force and meniscus |
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| 6846. |
Compare the radii of two species X and Y. Give reasons for your answer.(a) X has 12 protons and 12 electrons (b) Y has 12 protons and 10 electrons |
| Answer» SOLUTION :RADII of Y is LESS than X because Y is CATION of X. | |
| 6847. |
Compare the properties of a typical metal and a non-metal on the basis of the following : (i) Nature of the oxide formed by them (ii) Conducticity. |
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Answer» SOLUTION :(i) OXIDES of METAL are basic/amphoteric whereas Oxides of non-metal are acidic/neutral. (ii) METALS are good conductors whereas non-metals are POOR conductors. |
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| 6848. |
Compare the energy released during direct electronic transition from 4th orbit to lst orbit with the energy released during successive electronic transi tions between the same orbits in H-atom. Is the energy of all successive transitions between the 4thorbit and 1st orbit equal |
| Answer» SOLUTION :expression fbr ENERGY of electron in nth ORBIT | |
| 6849. |
Compare the conductivity of same amount of NaCl dissolved in water and in alcohol (assume that volumes of solvents are equal) |
| Answer» Solution :The conductivity of an electrolyte depends on the nature of solvent. A solvent having high dielectric constant like water has greater ABILITY to weaken the strong electrostatic force of attraction between `Na^(+) and Cl^(-)` ions when it is dissolved in water. Therefore, AQUEOUS solution of NaCl contains free ions that conduct electricity. When the same substance is dissolved in alcohol that has low dielectric constant, the electrostatic forces cannot be weakened to a large extent. As a result, there are few MOBILE ions in the solution. HENCE, it is a poor conductor of electricity. | |
| 6850. |
Compare the chemical reactivity of saturated and unsaturated compounds. |
| Answer» SOLUTION :Unsaturated COMPOUNDS are more REACTIVE CHEMICALLY than the SATURATED compounds. | |