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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.
| 30651. |
The gas which used in NMR is |
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Answer» He |
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| 30652. |
The gas which turns lime water milky is : |
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Answer» `NO_2` |
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| 30653. |
The gas which is used for the artificial ripening of fruits is: |
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Answer» `C_2H_6` |
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| 30655. |
the gas which is absorbed by ferrous sulphate solution giviing blackish brown colour is |
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Answer» NO |
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| 30656. |
The gas which is absorbed by ferrous sulphate solution giving blackish brown colour is: |
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Answer» `NH_3` |
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| 30657. |
The gas which has similar shape and bond orderas that of azide ion is: |
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Answer» SULPHUR DIOXIDE |
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| 30658. |
The gas which gives benzene on passing through a red hot tube is : |
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Answer» `C_(2)H_(6)` 
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| 30659. |
The gas not having oxidising and bleaching property is |
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Answer» Chlorine |
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| 30660. |
The gas used in the manufacture of icecream is: |
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Answer» `CO_2` |
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| 30661. |
The gas used in the hydrogenation of oils in presence of nickel as a catalyst is: |
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Answer» Methane |
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| 30662. |
The gas used in artificial respiration is. |
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Answer» `O_(2)+CO_(2)` |
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| 30663. |
Thenoble gas used inthermometer is: |
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Answer» He |
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| 30664. |
The gas used for inflating the tyres of aeroplanes is: |
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Answer» `H_2` |
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| 30665. |
The gas that is most convenient to use in gas thermometers |
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Answer» He |
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| 30666. |
The gas that can readily decolourise acidified KMnO_(4) solution is…. |
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Answer» <P>`NO_(2)` |
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| 30667. |
The gas that bubbles over the platinum electrode in SHE is ________. |
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Answer» hydrogen |
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| 30668. |
Thegassuppliedincylinders forcookingis : |
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Answer» Marchgas |
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| 30670. |
The gas phase reaction 2NO_(2)(g)rarrN_(2)O_(4)(g) is an exothermic reaction. The decomposition of N_(2)O_(4),in equilibrium mixture of 1NO_(2)(g) and N_(2)O_(4)(g), can be increased by : |
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Answer» addition of an inert GAS at CONSTANT VOLUME. |
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| 30671. |
The gas phase decomposition of dimethyl ether follows first-order kinetics:CH_3 - O - CH_3(g) to CH_4(g) + H_2(g) + CO(g)The reaction is carried out in a constant-volume container at 500^@Cand has a half-life of 14.5 min. Initially only dimethyl ether is present at a pressure of 0.4 atm. What is the total pressure of the system after 12 minutes? Assume ideal gas behaviour. |
| Answer» SOLUTION :0.75 ATM | |
| 30672. |
The gas phase decomposition of dimethyl ether follows first order kinetics, CH_(3)-O-CH_(3)(g) to CH_(4)(g)+H_(2)(g)+CO(g) The reaction is carried out in a constant volume container at 500^(@)C and has a half-life of 14.5 minutes. Initially only dimethyl ether is present at a pressure of 0.4 atm. What is the total pressure of the system after 12 mins. Assume ideal gas behaviour. |
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Answer» |
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| 30673. |
The gas - phasereactionbetweenNO and Br_(2)is respresentedby theequation2NO_((g)) + Br_(2(g)) to 2NOBr_((g) (a ) Writethe expressionsfor therate of consumption ofreactantsand formationof products. ( b) Writethe expressionfor therate of overallreactionin terms ofrates of consumptionof reactions andformationof products. |
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Answer» Solution :GIVEN : `2NO_((g))+ Br_(2(g))to 2NOBr_((g))` <BR> (a )Rateof consumptionof NOat time`t= - (d[NO])/(dt)` Rateof consumptionof `Br_(2)`at time `t = (- d[Br_(2)])/(dt)` Rateof FORMATIONOF NOBR at time `t= (d[NOBr])/(dt)` ( b) Rateof reaction`= - (1)/(2) (d[NO])/(dt) =(-d[Br_(2)])/(dt)= (1)/(2) (d[NOBr])/(dt)` |
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| 30674. |
The gas phase decomposition (in closed container) 2A_((g)) rarr 4B_((g)) +C_((g)) Follows the first order rate law. At a given temperature specific reaction rate is 7.5 xx 10^(–3) s^(–1). The initial pressure of A is 0.1 atm. Calculate the time of decomposition of A so that the total pressure becomes 0.15 atm. (log 1.4925 = 0.1739). |
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Answer» `66.6 SEC` |
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| 30675. |
The gas molecules randomly move in an directions and collide with each other and with the wall of the container. It is dificult to detemine the speed of an individual molecule but it has become possible to Work out the distribution of molecules among different molecular speeds. This is known as Maxwell Boltzmann distribution. Consider the following graph about Maxwell's distribution of speeds at two different temperatures T_(1)and T_(2) and answer the following questions: Total area under the curve at T_(1) is |
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Answer» EQUAL to that under curve at `T_(2)` |
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| 30676. |
The gas molecules randomly move in an directions and collide with each other and with the wall of the container. It is dificult to detemine the speed of an individual molecule but it has become possible to Work out the distribution of molecules among different molecular speeds. This is known as Maxwell Boltzmann distribution. Consider the following graph about Maxwell's distribution of speeds at two different temperatures T_(1)and T_(2) and answer the following questions: In the above graph the point P' refers to |
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Answer» ROOT MEAN SQUARE speed at `T_(1)` |
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| 30677. |
The gas molecules randomly move in an directions and collide with each other and with the wall of the container. It is dificult to detemine the speed of an individual molecule but it has become possible to Work out the distribution of molecules among different molecular speeds. This is known as Maxwell Boltzmann distribution. Consider the following graph about Maxwell's distribution of speeds at two different temperatures T_(1)and T_(2) and answer the following questions: The shaded area represents |
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Answer» NUMBER of molecules having speed between `u_(1) and u_(2)` |
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| 30678. |
The gas obtained when urea reacts with nitrous acid is: |
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Answer» `N_2` |
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| 30679. |
The gas librated , onheating amixtureof two salts with NaOHgive sa reddish brownprecipitate with analkline solutionof K_(2)HgI_(4) the aqeoussolutionof the mixtureon treatmentwith BaCI_(2) givesawhiteprecipitatewhichis sparinglysoluble with K_(2)Cr_(2)O_(7) and concentratedH_(2)SO_(4)red vapour of A areproduced .The aqueoussolution of the mixturegivesa deep -bluecolourationB withpotassiumferrcyanidesolubleidentifythe redicals in thegivesmixtureand writethebalancedequationin thegivesmixtureandwritethebalanced equationsfor theformationof A and B |
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Answer» Solution :The mixture contain `NH_(4)^(Theta) , CI^(Theta) ,SO_(4)^(Theta) ,Fe^*(2+)` i. Gas is clearly ammonia` rArrNH_(4)^(Theta)` is confiemed iiiWhite ppt `overset(HCI)` to sparingly soluble `RARR SO_(4)^(2-)` ion is present III Red vapour are produced `K_(2)Cr_(2)O_(3) + H_(2)SO_(4) + ? rarr ` REd vapour `(rArr Cr_(2)CI_(2)`chromyl CHLORIDE) Hence `CI^(Theta)` ion is present iv Test indicates `Fe^(2+)` `Fe^(2+) + [Fe(CN)_(6)]^(2+) rarr Fe^(3+) + underset("Deep blue")(Fe_(4)[Fe(CN)_(6)]_(3))` |
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| 30680. |
The gas liberated on heating a mixture of two salts with NaOH, gives a reddish brown precipitate with an alkaline solution of K_(2)Hgl_(4). The aqueous solution of the mixture on treatment with BaCl_(2) gives a white precipitate which is sparingly soluble in conc. HCI. On heating the mixture with K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4) red vapours A are produced. The aqueous solution of the mixture gives a deep blue colouration B with potassium ferricyanide solution. Identify the radicals in the given mixture and write the balanced equations for the formation of A and B. |
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Answer» Solution :`NH_(4^(*)),Fe^(2+),SO_(4^(2-)),CI^(-)` Formation of a reddish brown PPT with alkaline `K_(2)Hgl_(4)` solution indicates the presence of radical ammonium `NH_(4^(+))` and the gas liberated in ammonia. The REACTIONS are as: `NH_(4)^(+)OH^(-)toNH_(3)+H_(2)O` `K_(2)Hgl_(4)to2KI+Hgl_(2)` `Hgl_(2)+2NH_(3)toHg(NH_(2))l+NH_(4)l` `Hg(NH_(2))l+HgltoNH_(2)Hg_(2)ł_(3)` On treatment with Bacla, a white ppt is formed which indicates the presence of sulphate anion `(SO_(4)^(2-))` sparingly soluble in conc. HCI. With `K_(2)Cr_(2)O_(7)` and conc. `H_(2)SO_(4)` RED vapours are evolved which indicates the presence of chloride ION `(Cl^(-))`. The reaction is as: `K_(2)Cr_(2)O_(7)+4Cl^(-)+underset(conc.)(6H_(2)SO_(4))tounderset(A)(2CrO_(2)Cl_(2))+2KHSO_(4)+4HSO_(4)^(-)+3H_(2)O` On treatment with potassium ferricyanide indicates the presence of ferrous ions. `[Fe(CN)_(6)]^(3-)toFe^(3+)+[Fe(CN)_(6)]^(4)` `4Fe^(3+)+3K_(4)[Fe(CN)_(6)]toFe_(4)underset(deep blue)([Fe(CN)_(6)]_(3))+12K^(+)` |
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| 30681. |
The gas liberated, on heating a mixture of two salts with NaOH, gives a reddish brown precipitate with an alkaline solution of K_(2)HgI_(4). The aqueous solution of the mixture on treatment with BaCl_(2) gives a white precipitate which is sparingly soluble in conc. HCl. On heating the mixture with K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4), red vapours A are produced. The aqueous solution of the mixture gives a deep blue colouration B with potassium ferricyanide solution. Identify the radicals in the given mixture and write the balanced equations for the formation of A and B. |
| Answer» | |
| 30682. |
The gas liberated by treating diethylether with PCI_5 is |
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Answer» `C_2H_4` |
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| 30683. |
The gasliberatedby the electrolysis of dipotassiumsuccinate solutionis : |
| Answer» Answer :C | |
| 30684. |
The gas liberated by reacting hydrochloric acid with finely powdered iron prevents the formation of which compound |
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Answer» `FeCl_(3)` |
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| 30685. |
The gas leaked from storage tank of the Union Carbide plant in Bhopal gas tragedy was |
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Answer» Phosgene |
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| 30686. |
The gas leaked from a storage tank of the Union Carbide plant in Bhopal gas tragedy was : |
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Answer» METHYL isocyanate |
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| 30687. |
The gasleakedfroma storagetankof the UnionCarbideplantin Bhopalgas tragedy was : |
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Answer» METHYLISOCYANATE |
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| 30688. |
Thegas iscooled suchthat it loses65 J of heat . The gascontracts as it coolsand workdoneon the systemequalto20 Jis exchargedwiththe surrounding . What are q, w and DeltaU? |
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Answer» `DeltaE = - 65 + 20= - 45 J` |
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| 30689. |
The gas having lowest boiling point is: |
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Answer» Hydrogen |
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| 30690. |
The gas (G_(1)) acts as |
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Answer» OXIDISINGAGENT |
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| 30691. |
The gas 'G' will show which of the following property ? |
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Answer» It turns LEAD ACETATE filter paper black. |
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| 30692. |
The gas evolved when methylamine reacts with nitrous acid is |
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Answer» `NH_3` ` underset((1^@ " amine"))(RNH_2)+HNO_2to ROH+N_2+H_2 O` |
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| 30693. |
The gas evolved when methylamine reacts with nitrous acid is…. |
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Answer» `NH_3` ` UNDERSET((1^@ " amine"))(RNH_2)+HNO_2to ROH+N_2+H_2 O` |
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| 30694. |
The gas evolved when methylamine reacts with nitrous acid is_____ |
| Answer» Answer :B | |
| 30695. |
The gas evolved when methylamine reacts with nitrous acid is: |
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Answer» `NH_(3)` |
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| 30696. |
The gas evolved on heating CaF_(2) and SiO_(2) with concentrated H_(2)SO_(4), on hydrolysis gives a white gelatinous precipitate. The precipitate is, |
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Answer» Hydroflousiliric acid |
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| 30697. |
The gas evolved on heating (NH_(4))_(2)Cr_(2)O_(7) is : |
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Answer» `NH_(3)` |
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| 30698. |
The gas evolved on heating alkali formate with sodalime is |
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Answer» `CO` `HCOONa+NaOH UNDERSET(DELTA)OVERSET(CaO)toH_(2)+Na_(2)CO_(3)` |
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| 30699. |
The gas/es involved in the formation of photochemical fog are |
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Answer» `CO_(2)` |
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| 30700. |
The gasemitted by spersonicjet planesthatslowlydepletes the concentratin of ozonelayeris |
| Answer» ANSWER :B | |