8881 + Interview Questions in Chemistry in Class 10 Page 140 InterviewSolution

6951.	Chemical species having identical bond order have same bond dissociation enthalpies.
Answer» ANSWER :FALSE

Discussion

6952.	Chemical seqaration is one of the methods employed in
Answer» DRESSING of ore CONCENTRATION of ore extraction of METAL from its oxide conversion ore to oxide Solution :Chemical SEPARATION is one of the methods employed in concentration of ore.

Discussion

6953.	Chemicalreaction involvesbreakingof oldbondsand formationof newbonds.
Answer» ANSWER :TRUE

Discussion

6954.	Chemical properties of the members of a homologous series are similar.
Answer» ANSWER :1

Discussion

6955.	Chemical properties of elements depend on
Answer» their ATOMIC mass their valence-shell electronic configuration their electronic configuration NONE of above Answer :B

Discussion

6956.	Chemical formula of rust is …………..
Answer» `FeO.xH_(2)O` `FeO_(4).xH_(2)O` `Fe_(2)O_(3).xH_(2)O` `FeO` ANSWER :C

Discussion

6957.	Chemical formula of washing soda is _____
Answer» Solution :`Na_(2)CO_(3).10H_(2)O`

Discussion

6958.	Chemical formula of rust is _________
Answer» `FEO.xH_2O` `FeO_4.xH_2O` `Fe_2O_3.xH_2O` `FeO` ANSWER :C

Discussion

6959.	Chemicalformulaof marbleis Ca(OH)_2.
Answer» SOLUTION :CORRECT STATEMENT: chemicalformulaofmarbleis `CaCO_3`.

Discussion

6960.	Chemical formula of bauxiteis __________
Answer» SOLUTION :`Al_2O_3,2H_2O`

Discussion

6961.	Chemical formulaof acetaldehye is __________
Answer» `CH_3CHO` `CH_3CH_2OH` `CH_3COOCH_3` `CH_3-O-CH_3` ANSWER :A

Discussion

6962.	Chemical formula for marble is ________ .
Answer» SOLUTION :`CaCO_(3)`

Discussion

6963.	Chemicalequilibrium is a _______ equilibrium .
Answer» SOLUTION :DYNAMIC

Discussion

6964.	Chemicalequilibriumcan beattainedin a _____.
Answer» SOLUTION :REVERSIBLEREACTION

Discussion

6965.	Chemical changes are reversible changes.
Answer» Solution :FALSE CORRECT STATEMENT:Chemical CHANGES are IRREVERSIBLE changes.

Discussion

6966.	Characters transmitted from parents to offspring are present in
Answer» Cytoplasm Ribosomers Golgicomplex Genes Answer :4

Discussion

6967.	Change in temperatureresults in change in equilibrium position . However, the addition of a catalyst results in no change in the equilibrium position . Justify.
Answer» Solution :When the TEMPERATURE is changed, the rate of forward reaction and backward reaction is exothermic, increase in temperature decreases the rate of increase in temperature decreases the rate of forward reaction thereby decreases the concentration of products . If the forward reaction is endothermic , an increase in temperaturefavours forward reaction and increases the concentration of products . THEREFORE, the conposition of reaction mixture at equilibrium changes When a catalyst is ADDED, the rate of forward reaction increases due to decrease in activation energy of the forward reaction. Since the reaction takes an alternative path, the activation energy of backward ALSO is reduced . Activation complex is formed at a lower energy state in a catalysed reaction. As both the rate of forward reaction and that of the backward reaction change ot the same extent, the composition of equilibrium mixture remains constant. Therefore, the equilibrium position remains for both catalysed and uncatalysed reactions.

Discussion

6968.	Chamical formula of clay is ……………. .
Answer» `Al_(2)O_(3)` `Al_(2)O_(3)`. `2H_(2)O` `Al_(2)O_(3)`. `2SiO_(2)`.`2H_(2)O` `Al_(2)O_(3)`.`2SiO_(2)`.`2H_(2)O` ANSWER :C

Discussion

6969.	Chalcogen means ____________
Answer» SOLUTION :ORE PRODUCING

Discussion

6970.	CH_(4)+O_(2)to
Answer» Solution :`UNDERSET("Methane")(CH_(4))+underset("Oxygen")(2O_(2))tounderset("DIOXIDE")underset("Carbon")(CO_(2))+underset("Water")(2H_(2)O)+" Heat and Light"`

Discussion

6971.	CH_(3)OH overset({:("Oxidation"),("Alkaline "KMnO_(4)):})underset(Delta)to
Answer» Solution :`underset("Methanol")(CH_(3)OH)OVERSET({:("Oxidation"),("Alkaline "KMnO_(4)):})underset(DELTA)to underset("acid")underset("Methanoic")(HCOOH)`

Discussion

6972.	CH_(3)OH+Nato
Answer» Solution :`underset("Methanol")(2CH_(3)OH)+underset("METAL")underset("Sodium")(2Na)tounderset("methoxide")underset("Sodium")(2CH_(3)O^(-)NA^(+))+underset("HYDROGEN")(H_(2))`

Discussion

6973.	CH_(3)OH , CH_(4), NaOH , C_(2)H_(5)OH
Answer» Solution :NaOH is ODD ONE because it is SUBATOMIC PARTICLE ,whereas the others are componentsused in electrolysis .

Discussion

6974.	CH_(3)COOH+NaHCO_(3)tto
Answer» Solution :`UNDERSET("acid")underset("Ethanoic")(CH_(3)COOH)+underset("carbonate")underset("HYDROGEN-")underset("Sodium")(NaHCO_(3))tounderset("ethanoate)")underset("(Sodium")underset("Sodium acetate")(CH_(3)COONa)+underset("WATER")(H_(2)O)+underset("dioxide")underset("CARBON")(CO_(2))`

Discussion

6975.	CH_(3)COOH+KOH to
Answer» Solution :`underset("ACID")underset("ETHANOIC")(CH_(3)COOH)+underset("hydroxide")underset("POTASSIUM")(KOH)tounderset("ethanoate)")underset("(Potassium")underset("acetate")underset("Potassium")(CH_(3)COOK)+underset("Water")(H_(2)O)`

Discussion

6976.	CH_(3)COOH+Na_(2)CO_(3)to
Answer» SOLUTION :`UNDERSET("acid")underset("Ethanoic")(2CH_(3)COOH)+underset("CARBONATE")underset("Sodium")(Na_(2)CO_(3))tounderset(("Sodium ethanoate"))underset("Sodium acetate")(2CH_(3)COONa)+underset("Water")(H_(2)O)+underset("dioxide")underset("CARBON")(CO_(2))`

Discussion

6977.	CH_(3)COOH+CH_(3)CH_(2)OH overset("Acid")to
Answer» Solution :`underset("Ethanoic acid")(CH_(3)COOH)+underset("Ethanol")(CH_(3)CH_(2)OH)overset("Acid")tounderset("ETHYL acetate")(CH_(3)-underset(O)underset(\|\|)C-O-CH_(2)-CH_(3))+underset("Water")(H_(2)O)`

Discussion

6978.	CH_(3)COOCH_(2)CH_(3)overset(NaOH)to
Answer» SOLUTION :`UNDERSET("Ethyl acetate")(CH_(3)COOCH_(2)CH_(3))overset(NaOH)tounderset(("Sodium ethanoate"))underset("Sodium acetate")(CH_(3)COONA)+underset("Ethanol")(CH_(3)CH_(2)OH)`

Discussion

6979.	CH_(3)CH_(2)OH overset("Hot concentrated")underset(H_(2)SO_(4))to
Answer» Solution :`UNDERSET("Ethanol")(CH_(3)CH_(2)OH)overset("Hot CONCENTRATED")underset(H_(2)SO_(4))tounderset("Ethene")(CH_(2)=CH_(2))+underset("Water")(H_(2)O_`

Discussion

6980.	CH_(3)CH_(2)OH overset("Alkaline "KMnO_(4))underset(Delta)to
Answer» Solution :`UNDERSET("Ethanol")(CH_(3)CH_(2)OH)overset("Alkaline "KMnO_(4))underset(Delta)to underset("Ethanoic acid")(CH_(3)COOH)`

Discussion

6981.	CH_(3)CH_(2)OH overset("Alkaline "KMnO_(4)+"Heat")toCH_(3)COOH In the above given reaction, alkaline KMnO_(4) acts as …
Answer» REDUCING agent oxidising agent catalyst dehydrating agent Answer :B

Discussion

6982.	CH_(3)CH_(2)OH+O_(2)to
Answer» SOLUTION :`UNDERSET("Ethanol")(CH_(3)CH_(2)OH)+underset("OXYGEN")(3O_(2))tounderset("dioxide")underset("Carbon")(2CO_(2))+underset("Water")(3H_(2)O)+" Heat and Light"`

Discussion

6983.	CH_(3)CH_2)OH+Na to
Answer» Solution :`underset("Ethanol")(2CH_(3)CH_(2)OH)+underset("metal")underset("Sodium")(2Na)tounderset("ETHOXIDE")underset("Sodium")(2CH_(3)CH_(2)O^(-)Na^(+))underset("GEN")underset("HYDRO-")(+H_(2))`

Discussion

6984.	CH_(3)CH_(2)COOH+NaHCO_(3)to
Answer» Solution :`UNDERSET("acid")underset("Propanoic")(CH_(3)CH_(2)COOH)+underset("CARBONATE")underset("hydrogen-")underset("Sodium")(NaHCO_(3))to underset("propanoate")underset("Sodium")(CH_(3)CH_(2)COONa)+underset("Water")(H_(2)O)+underset("DIOXIDE")underset("Carbond")(CO_(2))`

Discussion

6985.	CH_(3)CH_(2)COOH+Na_(2)CO_(3)to
Answer» Solution :`UNDERSET("acid")underset("PROPANOIC")(2CH_(3)CH_(2)COOH)+underset("carbonate")underset("Sodium")(Na_(2)CO_(3))tounderset("Propanoate")underset("Sodium")(2CH_(3)CH_(2)COONa)+underset("Water")(H_(2)O)+underset("DIOXIDE")underset("Carbon")(CO_(2))`

Discussion

6986.	CH_(3)CH_(2)COOH+KOH to
Answer» SOLUTION :`UNDERSET("acid")underset("Propanoic")(CH_(3)CH_(2)COOH)+underset("hydroxide")underset("Potassium")(KOH)tounderset("propanoate")underset("Potassium")(CH_(3)CH_(2)COOK)+underset("WATER")(H_(2)O)`

Discussion

6987.	CH_(3)CH_(2)COOH+CH_(3)OH overset("Acid")to
Answer» Solution :`underset("Propanoic acid")(CH_(3)CH_(2)COOH)+underset("METHANOL")(CH_(3)OH)overset("Acod")tounderset("Methyl propanoate")(CH_(3)-CH_(2)-underset(O)underset(\|\|)C-O-CH_(3))+underset("WATER")(H_(2)O)`

Discussion

6988.	CH_(3)CH_(2)COOCH_(3)overset(NaOH)to
Answer» Solution :`UNDERSET("METHYL propanoate")(CH_(3)CH_(2)COOCH_(3))overset(NAOH)tounderset("Sodium propanoate")(CH_(3)CH_(2)COONA)+underset("Methanol")(CH_(3)OH)`

Discussion

6989.	CH_(3)CH_(2)CH_(2)OH overset("Hot concentrated")underset(H_(2)SO_(4))to
Answer» SOLUTION :`UNDERSET("PROPANOL")(CH_(3)CH_(2)CH_(2)OH)overset("Hot CONCENTRATED")underset(H_(2)SO_(4))tounderset("Propene")(CH_(3)-CH=CH_(2))+underset("Water")(H_(2)O)`

Discussion

6990.	CH_(3)CH_(2)CH_(2)COOH+NaHCO_(3)to
Answer» Solution :`underset("BUTANOIC acid")(CH_(3)CH_(2)CH_(2)COOH)+underset("CARBONATE")underset("hydrogen-")underset("Sodium")(NaHCO_(3))tounderset("Sodium butanoate")(CH_(3)CH_(2)CH_(2)COONa)+underset("Water")(H_(2)O)+underset("dioxide")underset("CARBON")(CO_(2))`

Discussion

6991.	CH_3 - CH_2OH overset(conc.H_2SO_4)(to) CH_2= CH_2 + H_2O This chemical reaction is
Answer» NEUTRALIZATION reaction because water is released Oxidation reaction because oxygen is removed from the reactant Addition reaction because HYDROGEN is ADDED to the reactant DEHYDRATION reaction because water is removed from the reactant Solution :Dehydration reaction because water is removed from the reactant

Discussion

6992.	Cations : +ve charge :: Anion : _____________
Answer» SOLUTION :`-ve` CHARGE

Discussion

6993.	Cations migrate towards it .
Answer» ANSWER :A

Discussion

6994.	Cationic radius is smaller than its relative neutral atom.Why?
Answer» Solution : When an neutral atom lose one or more electrons it forms cation.`NatoNa^(+) + e^(-)` • The radius of this cation `(r_(Na^(+))` . +) Is DECREASED than its parent atom `(r_(Na))`.• When an atom is charged to cation, the number of nuclear charge becomes greater than the number of orbital electrons.Hence the REMAINING electrons are more strongly ATTRACTED by the nucleus.Hence the CATIONIC radius is smaller than its RELATIVE neutral atom.

Discussion

6995.	Cathode rays have
Answer» MASS only CHARGE only both mass and charge because it is GAS ANSWER :C

Discussion

6996.	Cathode rays get deflected in an electric field towards
Answer» POSITIVE PLAT NEGATIVE plate no deflection takes place both (b) and (c) are correct ANSWER :A

Discussion

6997.	Cathode rays can be deflected by
Answer» MAGNETIC field only electric field only both types of fields NONE of these ANSWER :C

Discussion

6998.	Catenation is the ability of an atom to form bonds with other atoms of the same element. It is exhibited by both carbon and silicon. Compare the ability of catenation of the two elements. Give reasons.
Answer» Solution :Carbon EXHIBITS CATENATION much more than silicon or any other element due to its smaller size which makes the `C-C` bonds STRONG while the Si-Si bonds are COMPARATIVELY WEAKER due to its large size.

Discussion

6999.	Carboxylic group is present in
Answer» ethylene methanoic ACID formaldehyde ETHANOL Solution :Carboxylic group is `- OVERSET(O)overset(\|\|)C-O -H` and is present in methanoic acid,`H - overset(O)overset(\|\|) C - O -H`.

Discussion

7000.	Carbonic acid is a weak acid.
Answer» SOLUTION :NA

Discussion

Explore topic-wise InterviewSolutions in .

Chemical species having identical bond order have same bond dissociation enthalpies.

Chemical seqaration is one of the methods employed in

Chemicalreaction involvesbreakingof oldbondsand formationof newbonds.

Chemical properties of the members of a homologous series are similar.

Chemical properties of elements depend on

Chemical formula of rust is …………..

Chemical formula of washing soda is _____

Chemical formula of rust is _________

Chemicalformulaof marbleis Ca(OH)_2.

Chemical formula of bauxiteis __________

Chemical formulaof acetaldehye is __________

Chemical formula for marble is ________ .

Chemicalequilibrium is a _______ equilibrium .

Chemicalequilibriumcan beattainedin a _____.

Chemical changes are reversible changes.

Characters transmitted from parents to offspring are present in

Change in temperatureresults in change in equilibrium position . However, the addition of a catalyst results in no change in the equilibrium position . Justify.

Chamical formula of clay is ……………. .

Chalcogen means ____________

CH_(4)+O_(2)to

CH_(3)OH overset({:("Oxidation"),("Alkaline "KMnO_(4)):})underset(Delta)to

CH_(3)OH+Nato

CH_(3)OH , CH_(4), NaOH , C_(2)H_(5)OH

CH_(3)COOH+NaHCO_(3)tto

CH_(3)COOH+KOH to

CH_(3)COOH+Na_(2)CO_(3)to

CH_(3)COOH+CH_(3)CH_(2)OH overset("Acid")to

CH_(3)COOCH_(2)CH_(3)overset(NaOH)to

CH_(3)CH_(2)OH overset("Hot concentrated")underset(H_(2)SO_(4))to

CH_(3)CH_(2)OH overset("Alkaline "KMnO_(4))underset(Delta)to

CH_(3)CH_(2)OH overset("Alkaline "KMnO_(4)+"Heat")toCH_(3)COOH In the above given reaction, alkaline KMnO_(4) acts as …

CH_(3)CH_(2)OH+O_(2)to

CH_(3)CH_2)OH+Na to

CH_(3)CH_(2)COOH+NaHCO_(3)to

CH_(3)CH_(2)COOH+Na_(2)CO_(3)to

CH_(3)CH_(2)COOH+KOH to

CH_(3)CH_(2)COOH+CH_(3)OH overset("Acid")to

CH_(3)CH_(2)COOCH_(3)overset(NaOH)to

CH_(3)CH_(2)CH_(2)OH overset("Hot concentrated")underset(H_(2)SO_(4))to

CH_(3)CH_(2)CH_(2)COOH+NaHCO_(3)to

CH_3 - CH_2OH overset(conc.H_2SO_4)(to) CH_2= CH_2 + H_2O This chemical reaction is

Cations : +ve charge :: Anion : _____________

Cations migrate towards it .

Cationic radius is smaller than its relative neutral atom.Why?

Cathode rays have

Cathode rays get deflected in an electric field towards

Cathode rays can be deflected by

Catenation is the ability of an atom to form bonds with other atoms of the same element. It is exhibited by both carbon and silicon. Compare the ability of catenation of the two elements. Give reasons.

Carboxylic group is present in

Carbonic acid is a weak acid.