100525 + Interview Questions in GENERAL QA IN GENERAL AWARENESS Page 148 InterviewSolution

7351.	If train B passes a platform in 90 sec, length of train 150 m and speed of train 20 kmph. Find the speed of train B if he passes to the platform in 180 sec and the ratio between the length of the platform to train B is 7 : 5.1. 10 kmph2. 12 kmph3. 15 kmph4. 18 kmph5. None
Answer» Correct Answer - Option 2 : 12 kmph Given: Speed of train A = 20 kmph Calculation: Let be assume the length of the platform is y ⇒ (y + 150)/{20 × (5/18)} = 90 ⇒ y + 150 = 100 × 5 ⇒ y = 350 Length of train B = (5/7) × 350 = 250 Speed of train B = (350 + 250)/180 = 600/180 mps ⇒ (600/180) × (18/5) ⇒ 12 kmph ∴ The result will be 12 kmph.

7351.

If train B passes a platform in 90 sec, length of train 150 m and speed of train 20 kmph. Find the speed of train B if he passes to the platform in 180 sec and the ratio between the length of the platform to train B is 7 : 5.1. 10 kmph2. 12 kmph3. 15 kmph4. 18 kmph5. None

Answer» Correct Answer - Option 2 : 12 kmph

Given:

Speed of train A = 20 kmph

Calculation:

Let be assume the length of the platform is y

⇒ (y + 150)/{20 × (5/18)} = 90

⇒ y + 150 = 100 × 5

⇒ y = 350

Length of train B = (5/7) × 350 = 250

Speed of train B = (350 + 250)/180 = 600/180 mps

⇒ (600/180) × (18/5)

⇒ 12 kmph

∴ The result will be 12 kmph.

Discussion

7352.	Statement-1: Low activation energy means the reaction will be faster. Statement-2 A thermodynamically stable product is always formed easily.A. If both the statement are TRUE and Statement -2 is the correct explanation of Statement-1:B. If both the statement are TRUE but Statement-2 is not the correct explanation of Statement-1C. If statement-1 is TRUE and Statement-2 is FALSED. If statement -1 is FALSE and Statement-2 is TRUE
Answer» A thermodynamically stable product with high activation energy is not formed esily, particularly at low temperature.

Discussion

7353.	The reaction of dimerisation of `NO_(2)` in `N_(2)O_(4)` is `2NO_(2)hArrN_(2)O_(4)`. The reaction is carried out by taking `1` mole each of `NO_(2)` and `N_(2)O_(4)` in a closed vessel of `1` litre at `400 K`. The equilibrium pressure was found to be `77 atm`. Which statements is correct for given values of teh reactions.?A. Dissociation of `N_(2)O_(4)` occurs with degree of dissociation of `N_(2)O_(4) 0.35`B. Formation of `NO_(2)` occurs and total moles of `NO_(2)` at equilibrium `1.35`C. Dissociation of `N_(2)O_(4)` occurs leaving `0.35` moles at equilibriumD. Formation of `NO_(2)` occurs with total moles at equilibrium `2.70`
Answer» `underset(1)(2NO_(2)) hArr underset(N_(2)O_(4))` Total moles taken `=2`, `:. P=2xx0.0821xx400=65.7 atm` Given equilibrium pressure is `77` atm, thus reaction should show the change where total number of moles increases i.e., dissociation of `N_(2)O_(4)`. `{:(N_(2)O_(4),hArr,2NO_(2)),(1,,1),(1-x,,1+2x):}` Total moles at eq.=`2+x` `=(PV)/(RT)=(77xx1)/(0.0821xx400)=2.35` `:. x=0.35`

Discussion

7354.	The minimum value of `y=5x^(2)-2x+1` isA. `(1)/(5)`B. `(2)/(5)`C. `(4)/(5)`D. `(3)/(5)`
Answer» Correct Answer - C The minimum/minimum value `(dy)/(dx)=0rArr5(2x)-2(1)+0=0=0rArrx=(1)/(5)` Now at `x=(1)/(5)m(d_(y^2))/(dx^(2))=10 x=(1)/(5)m(d_(y^2))/(dx^(2))=10` which is positive so minima at `x=(1)/(5)`. Therefore `y_("min")=5((1)/(5))^(2)-2((1)/(5))+1=(4)/(5)`

Discussion

7355.	Evaluate `int (x^(2)-cos x+(1)/(x))dx`
Answer» `=intx^(2)dx-intcos xdx+int(1)/(x)dx=(x^(2+1))/(2+1)-sin x +"log"_(e)x+c`

Discussion

7356.	The reaction of dimerisation of `NO_(2)` in `N_(2)O_(4)` is `2NO_(2)hArrN_(2)O_(4)`. The reaction is carried out by taking `1` mole each of `NO_(2)` and `N_(2)O_(4)` in a closed vessel of `1` litre at `400 K`. The equilibrium pressure was found to be `77 atm`. The equilibrium pressure at which dissociation of `N_(2)O_(4)` will show degree of dissociation of `N_(2)O_(4)` to be `0.50` in the above case:A. `82.1 atm`B. `65.7 atm`C. `72.0 atm`D. `70.0 atm`
Answer» `{:(N_(2)O_(4),hArr,2NO_(2)),(1,,1),(0.5,,1+0.5xx2):}` Moles at equilibrium `=2.5` `:. P_(at eq.)=2.5xx0.0821xx400` `=82.1 atm`

Discussion

7357.	Intergrate w.r.t. x.: (i) `x^(11//2)` (ii) `x^(-7)` (iii) `x^(p//q)`
Answer» (i) `intx^(11//2)dx=(x^(11/2+1))/((11)/(2)+1)+c=(2)/(13)xx^(13//2)+c` (ii) `intx^(-7)dx=(x^(-7+1))/(-7+1)+c=-(1)/(6)x^(-6)+c` (iii) `intx^((p)/(q))dx=(x^((p)/(q)+1))/((P)/(q)+1)+c=(q)/(p+q)x^((p+q)//q)+c`

Discussion

7358.	The rate of a reaction quadruples when the temperature changes from `293K` to `313K`. Calculate the energy of activation of the reaction assuming that it does not change with temperature.
Answer» Correct Answer - `E_(a)=52.8 mol^(-1)` Let `k` at `293K=k_(1),k at 313K=k_(2)` `:.k_(2)=4k_(1) or (k_(2))/(k_(1))=4` Using Arrhenius equation, `log``(k_(2))/(k_(1))=(E_(a))/(2.303R)((T_(2)-T_(1))/(T_(1)T_(2)))` `log4=(E_(a))/(2.303xx8.314J K^(-1)mol^(-1))xx((313-293))/(313xx293)` `0.606=(E_(a))/(2.303xx8.314)xx(10)/(313xx293)` Solvie for `E_(a):` `:. E_(a)=52860J mol^(-1)=52.86mol^(-1)`

Discussion

7359.	The approx value of `K` for a reaction `AhArrB` is `:` Given `Delta_(r)H_(298K)^(@)=-54.07KJmol^(-1)`,`Delta_(r)S_(298K)^(@)=10Jk^(-1)mol^(-1)` and `R=8.314JK^(-1)mol^(-1)`.A. `10^(+10)`B. `10^(-100)`C. `10^(-10)`D. `10^(+100)`
Answer» Correct Answer - A

Discussion

7360.	Which of the following option is correct of the above reaction?A. `x=PhCOOH y=C_(2)H_(5)OH`B. `M=PhPhCOONa N=CH_(3)OCH_(3)`C. `x=PhOH y=CH_(3)OCH_(3)`D. `M=C_(2)H_(5)ONa N=CH_(3)OCH_(3)`
Answer» Correct Answer - D `PhCOOH` is more acidic than `H_(2)CO_(3)` while `PhOH` is less acidic than `H_(2)CO_(3)`

Discussion

7361.	`6ml` of `0.1M CH_(3)COOH` when mixed with `x` ml of `0.1 M NaOH` the `pH` of the resulting buffer solution was found to be `5.04`. The value of `x` is `(log2=0.3)pK_(a(CH_(3)COOH))=4.74`
Answer» Correct Answer - 4 `underset(0.6-0.x) underset(6xx0.1=0.6)(CH_(3)COOH)+underset(x xx 0.1)(NaOH)tounderset(0.x)underset(0)(CH_(3)COONa)+H_(2)O` The resulting solution is a buffer solution. `pH=pK_(a)= "log"([CH_(3)COO^(-)])/([CH_(3)COOH]) 0.3 = "log" (0.x)/(0.-0.x)` `pH=pK_(a)+"log"(0.x)/(0.6-0.x) log 2="log" (0.x)/(0.6-0.x)` `5.04=4.74+"log"(0.x)/(0.6-0.x) (0.x)/(0.6-0.x)=2` `x=4`

Discussion

7362.	How many of the following species are paramagnetic? `N_(2)^(+), O_(2)^(-), B_(2), C_(2), CN^(-), NO^(+), CO, H_(2)^(-), He_(2)^(+)`
Answer» Correct Answer - 5 The following species are paramagnetic `N_(2)^(+),O_(2)^(-), B_(2), H_(2)^(-),He_(2)^(+)`

Discussion

7363.	Consider the reactions:2S2O32-(aq) + I2(s) ⟶ S4O62-(aq) + 2I-(aq)S2O32-(aq) + 2Br2(I) ⟶ 5H2O(I) ⟶ 2SO42-(aq) + 4Br-(aq) + 10H+ (aq)Why does the same reductant, thiosulphate react differently with iodine and bromine?
Answer» The average O.N. of S in S₂O₃^2- is + 2 while in S₄O₆^2- it is + 2.5. The O.N. of S in SO₄^2- is+6. Since Br₂ is a stronger oxidising agent that l₂ , it oxidises S of S₂O₃^2- to a higher oxidation state of + 6 and hence forms SO₄^2- ion. l₂ , however, being a weaker oxidising agent oxidises S of S₂O₃2- ion to a lower oxidation of + 2.5 in S₄O₆^2- ion.

Discussion

7364.	When phenol reactes with `CHCl_(3)` and NaOH followed by acidification, salicyladehyde is obtained. Which of the following species are involed in the above-mentioned reaction as intermediates ?A. B. C. D.
Answer» Correct Answer - A::D

Discussion

7365.	Which oxide of nitrogen is obtained on heating ammonium nitrate at 250ºC ?(a) Nitric oxide (b) Nitrous oxide (c) Nitrogen dioxide (d) Dinitrogen tetraoxide
Answer» (b) Nitrous oxide

Discussion

7366.	On heating ammonium dichromate and barium azide separately we get(a) N2 in both cases(b) N2 with ammonium dichromate and NO with barium azide(c) N2O with ammonium dichromate and N2 with barium azide(d) N2O with ammonium dichromate and NO2 with barium azide
Answer» (a) N₂ in both cases

Discussion

7367.	CF2 Cl2 is used as a/an– (a) Antiseptic(b) Insecticide(c) Analgesic(d) Refrigerant
Answer» CF₂ Cl₂ is used as a Refrigerant

Discussion

7368.	The antiseptic action of CHI3 is due to (a) CHI3 (b) Liberation of free iodine(c) Iodide ions(d) Iodine and CHI3 both
Answer» The antiseptic action of CHI₃ is due to Liberation of free iodine.

Discussion

7369.	Which of the following is a secondary alkyl halide ? (a) Isobutyl chloride(b) Isopentyl chloride(c) Neopentyl chloride(d) Isopropyl chloride
Answer» Isopropyl chloride is a secondary alkyl halide.

Discussion

7370.	Write the chemical formulae of the following ores :(a) Haematite (b) Magnetite(c) Limonite (d) Siderite
Answer» (a) Fe2O3 (b) Fe3O4 (c) Fe2O3.2H2O (d) FeCO3

Discussion

7371.	Give the principles involved in the manufacture of sulphuric acid by contact process with equations:
Answer» Production of sulphur dioxide: It is carried out by burning powdered sulphur or roasting of sulphur rich ores. S₈ + 8O₂ → 8SO₂ 4FeS₂ + 11O₂ → 2Fe₂O₃ + 8SO₂

7371.

Give the principles involved in the manufacture of sulphuric acid by contact process with equations:

Answer»

Production of sulphur dioxide: It is carried out by burning powdered sulphur or roasting of sulphur rich ores.

S₈ + 8O₂ → 8SO₂

4FeS₂ + 11O₂ → 2Fe₂O₃ + 8SO₂

Discussion

7372.	Mention one use each of Paracetamol
Answer» The use of Paracetamole is to the fever as antipyretic.

Discussion

7373.	Mention one use each of Tincture of iodine.
Answer» The use of Tinture iodine as Antiseptic for clerminl wounds.

Discussion

7374.	The IUPAC name of C3H4.
Answer» The answer is propene HH-C--C--HH Cyclopropene Cyclopropene is an organic compound with the formula C₃H₄. It is the simplest cycloalkene. Because the ring is highly strained, cyclopropene is difficult to prepare and highly reactive. This colorless gas has been the subject for many fundamental studies of bonding and reactivity.

7374.

The IUPAC name of C3H4.

Answer» The answer is propene

HH-C--C--HH

Cyclopropene

Cyclopropene is an organic compound with the formula C₃H₄. It is the simplest cycloalkene. Because the ring is highly strained, cyclopropene is difficult to prepare and highly reactive. This colorless gas has been the subject for many fundamental studies of bonding and reactivity.

Discussion

7375.	CO + H2 + X Catalyst/300°c/300atm → CH3OH, the catalyst X is(1) Fe (2) Cr2O3/ZnO (3) V2O5 (4) Al2O3
Answer» CO + H₂ + X Catalyst/300°c/300atm → CH₃OH, the catalyst X is Cr₂O₃/ZnO

Discussion

7376.	Some chemicals are given below. Sodium chloride, Ammonium hydroxide, Nitric acid, cone. Sulphuric, Sodium hydroxide. a. Which are the substances needed to produce hydrogen chloride? b. Suggest a method to identify hydrogen chloride gas.
Answer» a. Sodium chloride b. Show a glass rod dipped in ammonia, just above the jar in which hydrogen chloride gas is taken. A white smoke of NH₃₄Cl is produced.

7376.

Some chemicals are given below. Sodium chloride, Ammonium hydroxide, Nitric acid, cone. Sulphuric, Sodium hydroxide. a. Which are the substances needed to produce hydrogen chloride? b. Suggest a method to identify hydrogen chloride gas.

Answer»

a. Sodium chloride

b. Show a glass rod dipped in ammonia, just above the jar in which hydrogen chloride gas is taken. A white smoke of NH₃₄Cl is produced.

Discussion

7377.	Take some ammonium chloride (NH4Cl) in a boiling tube and heat it. Don’t you sense a peculiar smell?
Answer» Yes. Pungent smell

Discussion

7378.	Take a little ammonium chloride (NH4Cl) in a watch glass and add a little calcium hydroxide (Ca(OH)2) to it. Stir well. Can you sense any smell?
Answer» Irritating smell is experienced.

Discussion

7379.	the vapour of which alcohol if passed over heated CU at 573K will produce an alkane?
Answer» When the vapours of tertiary butyl alcohol are passed through heated copper of 573K when the vapours of an alcohol are passed over copper catalyst heated at 573K. it undergoes dehydrogenation (loss of hydrogen or oxidation). The product formed depends on the alcohol and hence this reaction is also used to distinguish the three classes of alcohols. Tertiary alcohol when reacted with copper catalyst at 573K are not dehydrogenated but undergoes dehydration to give the corresponding alkene.

7379.

the vapour of which alcohol if passed over heated CU at 573K will produce an alkane?

Answer»

When the vapours of tertiary butyl alcohol are passed through heated copper of 573K

when the vapours of an alcohol are passed over copper catalyst heated at 573K. it undergoes dehydrogenation (loss of hydrogen or oxidation). The product formed depends on the alcohol and hence this reaction is also used to distinguish the three classes of alcohols.

Tertiary alcohol when reacted with copper catalyst at 573K are not dehydrogenated but undergoes dehydration to give the corresponding alkene.

Discussion

7380.	pH of ammonium chloride (NH4Cl) or copper sulphate (CuSO4) solution beA) 7B) >7C) <7D) 0
Answer» The answer is C) <7

Discussion

7381.	The conductivity of a solution of complex with formula CoCl3(NH3)4 corresponds to 1 : 1 electrolyte, then the primary valency of central metal ion is ____.
Answer» [Co(NH₃)₄Cl₂]Cl Primary valency = oxidation no. = +3

7381.

The conductivity of a solution of complex with formula CoCl3(NH3)4 corresponds to 1 : 1 electrolyte, then the primary valency of central metal ion is ____.

Answer»

[Co(NH₃)₄Cl₂]Cl

Primary valency = oxidation no. = +3

Discussion

7382.	The elevation of boiling point of 0.10 m aqueous CrCl3 .xNH3 solution is two times that of 0.05m aqueous CaCl2 solution. The value of x is____. [Assume 100% ionisation of the complex and CaCl2 , coordination number of Cr as 6, and that all NH 3 molecules are present inside the coordination sphere]
Answer» Correct answer is 5.00 2Tb=i1×kb×0.10 -(1) Tb=i2×kb×0.05 -(2) Solving (1) and (2) , We get i1=i2 Now i2 (for cacl2) = 3 So, i1=3 The country point hence formed is Cr[(cl) (nh3) 5]cl2.

Discussion

7383.	The number of six membered carbon rings in the structure of Buckminsterfullerene (i.e. `C_60`)is .
Answer» Correct Answer - 20 It contains twenty six - membered rings and twelve five-membered rings.

Discussion

7384.	How carbon monoxide, emitted by automobiles, prevents transport of oxygen in the body tissues?(a) by forming a stable compound with haemoglobin(b) by obstructing the reaction of oxygen with haemoglobin(c) by changing oxygen into carbon dioxide(d) by destroying the haemoglobin.
Answer» (a) by forming a stable compound with haemoglobin

Discussion

7385.	`CH_(3)CH=CH_(2)+BrC Cl_(3)overset("Peroxide")to[A]`
Answer» `underset("Propene")(CH_(3)CH=CH_(2)+BrC Cl_(3))overset("Peroxide")tounderset([A])(CH_(3)CH(Br)-CH_(2)C Cl_(3))`

Discussion

7386.	find the total numbers of compounds which contain S-S linkage. `H_(2)S_(2)O_(3),H_(2)S_(2)O_(5),H_(2)S_(4)O_(6),H_(2)S_(2)O_(7),H_(2)SO_(2)O_(8),H_(2)SO_(2)O_(6)`
Answer» Correct Answer - 4

Discussion

7387.	find the total number of compounds containing X-O-X linkage. (where X is the central atom) `N_(2)O_(4),N_(2)O_(5),P_(4)O_(10),H_(2)S_(2)O_(8),H_(4)P_(2)O_(8),C_(3)O_(2),Cr_(2)O_(7)^(2-),Cl_(2)O_(7),(HPO_(3))_(3),(SO_(3))_(3)`
Answer» Correct Answer - 6

Discussion

7388.	IUPAC nme of Isooctane isA. 2-methyl heptaneB. 2,3,4-Trimethyl pentaneC. 2,2,4-Trimethyl pentaneD. 2,3,3-Trimethly pentane
Answer» Correct Answer - 3

Discussion

7389.	which of the following options consits of only those orbitals which have number opf radial nodes exactly same as their angular nodes ?A. 1s,2p,3dB. 1s,2s,3sC. 1s,3p,5dD. 4f,5g,6h
Answer» Correct Answer - 3

Discussion

7390.	Which of the following is correct radial probability distributaion curve for various orbitals?A. B. C. D.
Answer» Correct Answer - A `mvr = (nh)/(2pi)` n = 4 `vec(v) = (1)/(lambda)=R(t)^(2)[(1)/((2)^(2))-(1)/((4)^(2))]=(3R)/(16)`

Discussion

7391.	Correct order of the heats of combustion of above compounds is :A. `(i) gt (ii) gt (iii)`B. `(i) gt (iii) gt (ii)`C. `(ii) gt (i) gt (iii)`D. `(ii) gt (iii) gt (i)`
Answer» Correct Answer - D `Deltax.Deltap=(h)/(4pi) " Given "Deltax=10^(-13)c.m.` `Deltap=mDeltav " "1 " Meter "= 100 c.m.` `Deltax.m.Deltav=(h)/(4pi) " "1 c.m. = 10^(-2) " meter"` `Deltav=(6.625xx10^(-34))/(4xx3.14xx10^(-11)xx9.1xx10^(-31))=0.0579xx10^(8)=5.79xx10^(6)m//sec`

Discussion

7392.	A body initially rest and sliding along a frictionless trick from a height `h` (as shown in the figure) just completes a vertical circle of diameter `AB = D`. The height `h` is equal to A. `(7)/(5)D`B. d=1kmC. `(3)/(2)D`D. `(5)/(4)D`
Answer» Correct Answer - D

Discussion

7393.	Transition metals (with the exception of Zn, Cd and Hg) are hard and have high melting and boiling points.
Answer» Transition metals contain unpaired electrons. Hence, they form covalent bonds which results in hardness. Transition metals have close packed structures in which transition metals are held together by strong metallic bonds which have notable covalent character. Hence, transition metals have high melting and boiling points. For Zn, Cd and Hg the d orbitals are completely filled and no covalent bonds are formed.

7393.

Transition metals (with the exception of Zn, Cd and Hg) are hard and have high melting and boiling points.

Answer»

Transition metals contain unpaired electrons. Hence, they form covalent bonds which results in hardness.

Transition metals have close packed structures in which transition metals are held together by strong metallic bonds which have notable covalent character.

Hence, transition metals have high melting and boiling points.

For Zn, Cd and Hg the d orbitals are completely filled and no covalent bonds are formed.

Discussion

7394.	In general the melting and boiling points of transition metalsA. Increase gradually across the period from left to right.B. Decrease gradually across the period from left to right.C. First increase till the middle of the period and then increase towards the end.D. First decrease regularly till the middle of the period and then increase towards the end.
Answer» Correct Answer - C Along the period , the number of unpaired electrons increases and then decreases due to the pairing to electrons so inter-atomic forces (i.e., metallic bond) increases upto middle of the series and then decreases .Boiling and melting points are directly proportionate to strength of metallic bond.

Discussion

7395.	The infinity resistance plug in a post office box (resistance box) has(a) An air gap only(b) A resistance coil of infinite resistance(c) Largest resistance value in box(d) Resistance of value 100 ohm
Answer» (a) An air gap only

Discussion

7396.	Consider the following statements regarding the network shown in the figurei) The equivalent resistance of the network between A and B is independent of the value of R’ ii) The equivalent resistance of the network between points A and B is 4 R/3 iii) The current flowing through R’ is zero Which of the above statement through (s) is/are correct? (a) (i) alone(b) (ii) alone(c) (ii) and (iii)(d) (i), (ii) and (iii)
Answer» Correct option(d) Explanation: As circuit is balanced Req = 4R/3 , which is independent of R' Current through R' = 0

7396.

Consider the following statements regarding the network shown in the figurei) The equivalent resistance of the network between A and B is independent of the value of R’ ii) The equivalent resistance of the network between points A and B is 4 R/3 iii) The current flowing through R’ is zero Which of the above statement through (s) is/are correct? (a) (i) alone(b) (ii) alone(c) (ii) and (iii)(d) (i), (ii) and (iii)

Answer»

Correct option(d)

Explanation:

As circuit is balanced

Req = 4R/3 , which is independent of R'

Current through R' = 0

Discussion

7397.	The top of a water tank is open to air and its water level is maintained. It is giving out 0.74m3 water per minute through a circular opening of 2cm radius in its wall. The depth of the centre of the opening from the level of water in the tank is close to: (1) 9.6m (2) 4.8m (3) 2.9m (4) 6.0m
Answer» The correct option (2) 4.8m Explanation: 0.74/60 = π x 4 x 10^-4 x √(2gh) => h = 4.8m

7397.

The top of a water tank is open to air and its water level is maintained. It is giving out 0.74m3 water per minute through a circular opening of 2cm radius in its wall. The depth of the centre of the opening from the level of water in the tank is close to: (1) 9.6m (2) 4.8m (3) 2.9m (4) 6.0m

Answer»

The correct option (2) 4.8m

Explanation:

0.74/60 = π x 4 x 10^-4 x √(2gh)

=> h = 4.8m

Discussion

7398.	The electron in the first excited state `(n_(1)=2)` of `H`- atom absorbs a photon and is further excited to `n^(th)` shell. The de-Broglie wavelength of the electron in this excited state is 1340 pm. Find the value of `n`.
Answer» Correct Answer - 4 `n=(lamda)/(2pir_(1))=1340/(2xx3.14xx53)=4`

Discussion

7399.	The rate law for a reaction is Rate = K [A] [B]3/2 Can the reaction be an elementary process ? Explain.
Answer» No, an elementary process would have a rate law with orders equal to its molecularities and therefore must be in integral form.

Discussion

7400.	Identify the order of a reaction from the following rate constant : k = 2.3 x 10-5 L mol-1 s-1
Answer» . Second order

Discussion

Explore topic-wise InterviewSolutions in .

If train B passes a platform in 90 sec, length of train 150 m and speed of train 20 kmph. Find the speed of train B if he passes to the platform in 180 sec and the ratio between the length of the platform to train B is 7 : 5.1. 10 kmph2. 12 kmph3. 15 kmph4. 18 kmph5. None

The minimum value of `y=5x^(2)-2x+1` isA. `(1)/(5)`B. `(2)/(5)`C. `(4)/(5)`D. `(3)/(5)`

Evaluate `int (x^(2)-cos x+(1)/(x))dx`

Intergrate w.r.t. x.: (i) `x^(11//2)` (ii) `x^(-7)` (iii) `x^(p//q)`

The rate of a reaction quadruples when the temperature changes from `293K` to `313K`. Calculate the energy of activation of the reaction assuming that it does not change with temperature.

The approx value of `K` for a reaction `AhArrB` is `:` Given `Delta_(r)H_(298K)^(@)=-54.07KJmol^(-1)`,`Delta_(r)S_(298K)^(@)=10Jk^(-1)mol^(-1)` and `R=8.314JK^(-1)mol^(-1)`.A. `10^(+10)`B. `10^(-100)`C. `10^(-10)`D. `10^(+100)`

Which of the following option is correct of the above reaction?A. `x=PhCOOH y=C_(2)H_(5)OH`B. `M=PhPhCOONa N=CH_(3)OCH_(3)`C. `x=PhOH y=CH_(3)OCH_(3)`D. `M=C_(2)H_(5)ONa N=CH_(3)OCH_(3)`

`6ml` of `0.1M CH_(3)COOH` when mixed with `x` ml of `0.1 M NaOH` the `pH` of the resulting buffer solution was found to be `5.04`. The value of `x` is `(log2=0.3)pK_(a(CH_(3)COOH))=4.74`

How many of the following species are paramagnetic? `N_(2)^(+), O_(2)^(-), B_(2), C_(2), CN^(-), NO^(+), CO, H_(2)^(-), He_(2)^(+)`

Consider the reactions:2S2O32-(aq) + I2(s) ⟶ S4O62-(aq) + 2I-(aq)S2O32-(aq) + 2Br2(I) ⟶ 5H2O(I) ⟶ 2SO42-(aq) + 4Br-(aq) + 10H+ (aq)Why does the same reductant, thiosulphate react differently with iodine and bromine?

When phenol reactes with `CHCl_(3)` and NaOH followed by acidification, salicyladehyde is obtained. Which of the following species are involed in the above-mentioned reaction as intermediates ?A. B. C. D.

Which oxide of nitrogen is obtained on heating ammonium nitrate at 250ºC ?(a) Nitric oxide (b) Nitrous oxide (c) Nitrogen dioxide (d) Dinitrogen tetraoxide

On heating ammonium dichromate and barium azide separately we get(a) N2 in both cases(b) N2 with ammonium dichromate and NO with barium azide(c) N2O with ammonium dichromate and N2 with barium azide(d) N2O with ammonium dichromate and NO2 with barium azide

CF2 Cl2 is used as a/an– (a) Antiseptic(b) Insecticide(c) Analgesic(d) Refrigerant

The antiseptic action of CHI3 is due to (a) CHI3 (b) Liberation of free iodine(c) Iodide ions(d) Iodine and CHI3 both

Which of the following is a secondary alkyl halide ? (a) Isobutyl chloride(b) Isopentyl chloride(c) Neopentyl chloride(d) Isopropyl chloride

Write the chemical formulae of the following ores :(a) Haematite (b) Magnetite(c) Limonite (d) Siderite

Give the principles involved in the manufacture of sulphuric acid by contact process with equations:

Mention one use each of Paracetamol

Mention one use each of Tincture of iodine.

The IUPAC name of C3H4.

CO + H2 + X Catalyst/300°c/300atm → CH3OH, the catalyst X is(1) Fe (2) Cr2O3/ZnO (3) V2O5 (4) Al2O3

Some chemicals are given below. Sodium chloride, Ammonium hydroxide, Nitric acid, cone. Sulphuric, Sodium hydroxide. a. Which are the substances needed to produce hydrogen chloride? b. Suggest a method to identify hydrogen chloride gas.

Take some ammonium chloride (NH4Cl) in a boiling tube and heat it. Don’t you sense a peculiar smell?

Take a little ammonium chloride (NH4Cl) in a watch glass and add a little calcium hydroxide (Ca(OH)2) to it. Stir well. Can you sense any smell?

the vapour of which alcohol if passed over heated CU at 573K will produce an alkane?

pH of ammonium chloride (NH4Cl) or copper sulphate (CuSO4) solution beA) 7B) &gt;7C) &lt;7D) 0

The conductivity of a solution of complex with formula CoCl3(NH3)4 corresponds to 1 : 1 electrolyte, then the primary valency of central metal ion is ____.

The elevation of boiling point of 0.10 m aqueous CrCl3 .xNH3 solution is two times that of 0.05m aqueous CaCl2 solution. The value of x is____. [Assume 100% ionisation of the complex and CaCl2 , coordination number of Cr as 6, and that all NH 3 molecules are present inside the coordination sphere]

The number of six membered carbon rings in the structure of Buckminsterfullerene (i.e. `C_60`)is .

How carbon monoxide, emitted by automobiles, prevents transport of oxygen in the body tissues?(a) by forming a stable compound with haemoglobin(b) by obstructing the reaction of oxygen with haemoglobin(c) by changing oxygen into carbon dioxide(d) by destroying the haemoglobin.

`CH_(3)CH=CH_(2)+BrC Cl_(3)overset("Peroxide")to[A]`

find the total numbers of compounds which contain S-S linkage. `H_(2)S_(2)O_(3),H_(2)S_(2)O_(5),H_(2)S_(4)O_(6),H_(2)S_(2)O_(7),H_(2)SO_(2)O_(8),H_(2)SO_(2)O_(6)`

find the total number of compounds containing X-O-X linkage. (where X is the central atom) `N_(2)O_(4),N_(2)O_(5),P_(4)O_(10),H_(2)S_(2)O_(8),H_(4)P_(2)O_(8),C_(3)O_(2),Cr_(2)O_(7)^(2-),Cl_(2)O_(7),(HPO_(3))_(3),(SO_(3))_(3)`

IUPAC nme of Isooctane isA. 2-methyl heptaneB. 2,3,4-Trimethyl pentaneC. 2,2,4-Trimethyl pentaneD. 2,3,3-Trimethly pentane

which of the following options consits of only those orbitals which have number opf radial nodes exactly same as their angular nodes ?A. 1s,2p,3dB. 1s,2s,3sC. 1s,3p,5dD. 4f,5g,6h

Which of the following is correct radial probability distributaion curve for various orbitals?A. B. C. D.

Correct order of the heats of combustion of above compounds is :A. `(i) gt (ii) gt (iii)`B. `(i) gt (iii) gt (ii)`C. `(ii) gt (i) gt (iii)`D. `(ii) gt (iii) gt (i)`

A body initially rest and sliding along a frictionless trick from a height `h` (as shown in the figure) just completes a vertical circle of diameter `AB = D`. The height `h` is equal to A. `(7)/(5)D`B. d=1kmC. `(3)/(2)D`D. `(5)/(4)D`

Transition metals (with the exception of Zn, Cd and Hg) are hard and have high melting and boiling points.

The infinity resistance plug in a post office box (resistance box) has(a) An air gap only(b) A resistance coil of infinite resistance(c) Largest resistance value in box(d) Resistance of value ­100 ohm

The top of a water tank is open to air and its water level is maintained. It is giving out 0.74m3 water per minute through a circular opening of 2cm radius in its wall. The depth of the centre of the opening from the level of water in the tank is close to: (1) 9.6m (2) 4.8m (3) 2.9m (4) 6.0m

The electron in the first excited state `(n_(1)=2)` of `H`- atom absorbs a photon and is further excited to `n^(th)` shell. The de-Broglie wavelength of the electron in this excited state is 1340 pm. Find the value of `n`.

The rate law for a reaction is Rate = K [A] [B]3/2 Can the reaction be an elementary process ? Explain.

Identify the order of a reaction from the following rate constant : k = 2.3 x 10-5 L mol-1 s-1

pH of ammonium chloride (NH4Cl) or copper sulphate (CuSO4) solution beA) 7B) >7C) <7D) 0

The infinity resistance plug in a post office box (resistance box) has(a) An air gap only(b) A resistance coil of infinite resistance(c) Largest resistance value in box(d) Resistance of value 100 ohm