52671 + Interview Questions in Chemistry in Class 11

1.	The ratio of the rates of diffusion of helium and methane under identical condition of pressure and temperature will be _____
Answer» SOLUTION :`(gamma_(He))/(gamma_(CH_4))= SQRT(16/4) = 2`.

Discussion

2.	The ratio of the R.M.S. Velocities of Hydrogen and Oxygen molecules at the same temperature is
Answer» `4:1` `1:4` `8:1` `1:8` ANSWER :A

Discussion

3.	The ratio of the radius of the first Bohr orbit for the electron orbiting the hydrogen nucleus to that of the electron orbiting the deuterium nucleus (mass nearly twice that of the hydrogen nucleus) is approximately
Answer» ANSWER :`(r_(1))/(r_(2)) = (1)/(1) = 1:1`

Discussion

4.	The ratio of the radius of H atom an H^(+)ion is nearly
Answer» 10 `10^(2)` `10^(3)` `10^(5)` ANSWER :D

Discussion

5.	The ratio of the radii of the first three orbits in an atom of hydrogen is
Answer» `1:4:9` `9:4:1` `1:2:3` `3:2:1` SOLUTION :`r_1 :r_2 :r_3 = 1:4:9`

Discussion

6.	The ratio of the number of sp, sp^(2) and sp^(3)orbitals in the compound is CH_(3)-CH=C=CH-C -= C-CH_(3)
Answer» `1:1:1` `2:2:1` `3:2:2` `3:3:4` ANSWER :D

Discussion

7.	The ratio of the number of sp, sp2 and sp3 carbons in the compound given below is H_(2)C=C=CH-CH_3
Answer» `1:2:1` `2:1:1` `1:1:2` `1:23` ANSWER :A

Discussion

8.	The ratio of the number of hybrid and pure orbitals C_(6)H_(6) is
Answer» `3:2` `2:3` `1:1` `4:3` Solution :BENZENE has 18 HYBRID ORBITALS and 12 pure orbitals

Discussion

9.	The ratio of the molar volume of the real gas to the molar volume of the same gas if it were ideal is called ……………………..
Answer» ANSWER :COMPRESSIBILITY FACTOR

Discussion

10.	The ratio of the frequency corresponding to the third line in the Lymas series of hydrogen atomic spectrum to that of the first line in Balmer series of Li^(2+) spectrum is
Answer» `(4)/(5)` `(5)/(4)` `(4)/(3)` `(3)/(4)` SOLUTION :For Lyman series, `n_(1) = 1`. For 3rd line of Lyman series `n_(2) = 4` For hydrogen, Z = 1. Hence, `v_(H) = (c)/(lamda) = c R_(H) Z^(2) ((1)/(n_(1)^(2)) - (1)/(n_(2)^(2)))` `= c R_(H) (1)^(2) ((1)/(1) - (1)/(4^(2))) = (15)/(16) R_(H.c)` for lithium, Z = 3 For 1ST line of Balmer series, `n_(1) = 2, n_(2) = 3` `:. v_(Li) = c.R_(H) (3)^(2) ((1)/(2^(2)) - (1)/(3^(2)))` `= c.R_(H) xx 9 xx (5)/(36) =(5)/(4) c.R_(H)` `:. (v_(H))/(v_(Li)) = ((15//16) c R_(H))/((5//4) c R_(H)) = (15)/(16) xx (4)/(5) = (3)/(4)`

Discussion

11.	The ratio of the kinetic energies of equal number of moles of H_(2)and He at the same temperature is
Answer» `1:1` `2:1` `1: 2` `4:1` ANSWER :B

Discussion

12.	The ratio of the average molecular kinetic energy of UF_(6) to that of H_(2). Both at 300K is:
Answer» `1:1` `7:2` `176:1` `2:7` ANSWER :a

Discussion

13.	The ratio of specific charge of an electron to that of a hydrogen ion is
Answer» `1 : 1` `2 : 1` `1840 : 1` `1 : 1840` Solution :Specific charge is E/m. MAGNITUDE of charge on `e^(-)` and `H^(+)` is same. HENCE, `((e//m)_(e))/((e//m)_(H^(+))) = (m_(H^(+)))/(m_(e)) = (1)/(1//840) = (1840)/(1) = 1840 : 1`

Discussion

14.	The ratio of specific charge of a proton and an alpha-particle is
Answer» `2:1` `1:2` `1:4` `1:1` ANSWER :B

Discussion

15.	The ratio of slopes of K_("max") vs. v and V_0 vs. v curves in the photoelectric effect gives (v= frequency , K_("max") = maximum kinetic energy , V_0 = stopping potential)
Answer» CHARGE of electron planck.s CONSTANT work FUNCTION the ratio of plant.s constant of ELECTRONIC charge Solution :

Discussion

16.	The ratio of sigma and pi bonds in benzene is
Answer» 2 4 6 8 Solution :RATIO `= (SIGMA "bonds")/(pi "bonds") = (12)/(3) = 4`

Discussion

17.	The ratio of root mean square velocity to average velocity of amolecule at a particular temperature is
Answer» `1 : 1.086` `2 : 1.86` `1086 : 1` `2.086 : 1` Solution :(c ) For a gas at temperature T, M is constant. `THEREFORE` Ratio of `(v_(rms))/(v_(AV))=SQRT((3RT)/(M))xxsqrt((piM)/(8RT))=(sqrt3xxsqrtpi)/(SQRT8)` `(sqrt3xxsqrt3.14)/(sqrt8)=(1.086)/(1)`

Discussion

18.	The ratio of rates of diffusion of two gases x and y under similar conditions is 2:1. What will be the ratio of their average speeds if gas X is at -23^@C and gas y is at 273^@C?
Answer» Solution :RATIO of rates of diffusion ` (r_(x))/(r_(y)) = SQRT((M_(y))/(M_(x))) = 2 (or) (M_(y))/(M_(x)) = 4` Ratio of average SPEEDS is given as, ` (barC_(X))/(C_(y)) = sqrt((T_(X))/(T_(y))(M_(y))/(M_(x)))` substituting the VALUES, the ratio of speeds ` = sqrt((250)/(500 XX 4) = sqrt(2) : 1 = 1.414 : 1 (or) 1 : 707`

Discussion

19.	The ratio of rates of diffusion of gases X and Y is 1 : 5 and that of Y and Z is 1 : 6. Then ratio of rates of diffusion Z and X is
Answer» `1:30` `1:6` `30:1` `6:1` ANSWER :C

Discussion

20.	The ratio of products, 1 - chloropropane to 2 - chloropropane respectively formed in the chlorination of propane if all the hydrogens are abstrated at equal rates is
Answer» `50:50` `25:75` `75:25` `12.5:87.5` SOLUTION :`CH_(3)-CH_(2)-CH_(3)` `6xx1=6, 2xx1=2` `100xx6//8=75,100xx2//8=25`

Discussion

21.	The ratio of pure orbitals to hybridized orbitals in ethylene is
Answer» `2:3` `3:1` `1:1` `1:3` ANSWER :C

Discussion

22.	The ratio of products, 1-chloropropane to 2-chloropropane respectively formed in the chlorination of propane if all the hdrogens are abstracted at equal rates is
Answer» `50:50` `25:75` `75:25` `12.5:87.5` SOLUTION :`CH_(3)-CH_(2)-CH_(3)` `6xx1=6,2xx1=2` `100x6//8=75,100xx2//8=25`

Discussion

23.	The ratio of number of sigma ( sigma) and pi (pi) bonds in 2-butynal is
Answer» `8//3` `5//3` `8//2` `9//2` Solution :`CH_(3) - C -= C - underset(O)underset(\|\|)(C)-H` 2 - butynal no. of `sigma` BONDS = `8[4C - H, 3C - C, 1C - O]` no. of `pi` bonds `= 3[2C - C ,1 C - O]` `:. ` ratio `= (8)/(3)`

Discussion

24.	The ratio of most probable velocity to the average velocity is
Answer» `(pi//2)` `2//pi` `SQRT(pi)//2` `2//sqrt(pi)` ANSWER :B::C

Discussion

25.	The ratio of masses of oxygen and nitrogen of a particular gaseous mixture is 1:4. The ratio of number of molecules is
Answer» `1/4` `7/32` `1/8` `3/16` ANSWER :B

Discussion

26.	The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1:4 The ratio of number of their molecule is :
Answer» `1:8` `3:16` `1:4` `7:32` ANSWER :D

Discussion

27.	A gaseous mixture contains oxygen and nitrogen in the ratio 1 : 4 by weight. Therefore, the ratio of the number of molecules is:
Answer» `1:4` `7:32` `1:8` `3:16` ANSWER :B

Discussion

28.	The ratio of mass percent of C and H of an organic compound (C_(X)H_(Y)O_(Z)) is 6: 1. If one molecule of the above compound (C_(X) H_(Y)O_(Z)) contains half as much oxygen as required to burn one molecule of compound C_(X)H_(Y) completely to CO_(2) and H_(2)O. The empirical formula of compound C_(X) H_(Y)O_(Z) is.
Answer» `C_(3)H_(6)O_(3)` `C_(2)H_(4)O` `C_(3)H_(4)O_(2)` `C_(2)H_(4)O_(3)` SOLUTION :`C_(X)H_(Y) + (X + (Y)/(4)) O_(2) RARR XCO_(2) + (Y)/(2)H_(2)O` according to given information `Z= (1)/(2) (2X + (Y)/(2))` `:. X=2, Y= 4, Z=3`

Discussion

29.	The ratio of mass percent of C and H of an organic compound (C_xH_yO_z) is 6 : 1. If one molecule of the above compound (C_xH_yO_z) contains half as much oxygen as required to burn one molecule of compound C_xH_y completely to CO_(2) and H_2O. The empirical formula of compound C_xH_yO_z is:
Answer» `C_(3)H_(6)O_(3)` `C_(2)H_(4)O` `C_(3)H_(3)O_(2)` `C_(2)H_(4)O_(3)` Answer :D

Discussion

30.	The ratio of magnetic moments of Fe(III) & Co(ll) is
Answer» `sqrt5 :sqrt7` `SQRT(35) : sqrt(15)` `7:3` `sqrt(24) : sqrt(15)` Solution :`Fe^(3+)` has 5 unpaired `e^-, CO^(2+) ` has 3 unpaired `e^-` `sqrt(N(n+2)) = sqrt(35) sqrt(n(n+2)) = sqrt(15)`

Discussion

31.	The ratio of kinetic energies of lg of H_2 and 2g of CH_4 at the same temperature will be
Answer» `1:4` ` 4:1 ` ` 1:2 ` ` 2:1` ANSWER :B

Discussion

32.	The ratio of K_(p)//K_(c) for reaction CO_((g))+1/2O_(2(g))hArrCO_(2(g)) is
Answer» `R/T` `RT` `(RT)^(1//2)` `(RT)^(-1//2)` ANSWER :D

Discussion

33.	The ratio of hydrogen, deuterium and tritium is
Answer» `3:2:1` `1:2:3` `3:6:1` `6:2:1` ANSWER :B

Discussion

34.	The ratio of hybrid to pure orbitals in benzene molecule is
Answer» `3:2` `2:3` `1:2` `4:1` SOLUTION :`4:1(12:3)`

Discussion

35.	The ratio of hybrid and unhybrid orbitals involved in the bonding of a benzene molecule is
Answer» `3:2` `1:1` `3:1` `1:3` ANSWER :A

Discussion

36.	The ratio of energies of photons with wavelengths 2000A^(0) and 4000A^(0) is
Answer» `1:4` `4:1` `1:2` `2:1` SOLUTION :`(E_1)/(E_2) = (lambda_2)/(lambda_1)`

Discussion

37.	The ratio of densities of hydrogen, deuterium and tritium under similar conditions of temperature and pressure
Answer» `3:2:1` `1:2:3` `3:6:1` `6:2:1` ANSWER :B

Discussion

38.	The ratio of densities of hydrogen, deuterium and tritium is
Answer» `3:2:1` `1:2:3` `3:6:1` `6:2:1` ANSWER :B

Discussion

39.	The ratio of de Broglic wavelengths of a deuterium atom to that of an a-particle, when the velocity of the former is five times greater than that of later, is
Answer» 4 `0.2` `2.5` `0.4` ANSWER :D

Discussion

40.	The ratio of charge to mass of an electron in coulombs per gram was determined by J.J. Thomson. He determined this ratio by measuring the deflection of cathode rays in electric and magnetic fields. What value did he find for this ratio?
Answer» `-1.76xx10^(8)` coulombs/g `1.76xx10^(-8)` coulombs/g `-1.76xx10^(10)` coulombs/g `-1.76xx10^(-10)` coulombs/g Answer :A

Discussion

41.	The ratio of charge and mass would be greater for
Answer» PROTON Electron NEUTRON Alpha particle ANSWER :B

Discussion

42.	The ratio of cationic radius to anionic radius in an ionic crystals is greater than 0.732. Its coordination number is
Answer» 1 4 6 8 Solution :RADIUS ratio falls in the RANGE `0.732 - 1`, thus COORDINATION number must be 8.

Discussion

43.	The ratio of average speed of an oxygen molcule to the RMS speed of a nitrogen molecule at the same temperature is
Answer» `((3PI)/(7))^(1//2)` `((7)/(3pi))^(1//2)` `((3)/(7pi))^(1//2)` `((7pi)/(3))^(1//2)` ANSWER :B

Discussion

44.	Comment over the following statement The ratio of atoms can vary in differently prepared samples of a compound.
Answer» ANSWER :F

Discussion

45.	The ratio of atomic mass of H and carbon is 1 : 3 in one hydrogen then its empirical formula is.....
Answer» `CH_(4)` `CH_(2)` `C_(2)H_(2)` `CH_(3)` ANSWER :A::C::D

Discussion

46.	The ratio of area covered by second orbital to the first orbital is
Answer» `1 : 1` `1 : 16` `8 : 1` `16 : 1` Solution :`r_(n) prop n^(2) :.` AREA COVERED `(A_(n)) prop n^(4) " " ( :' " Area " = pi^(2))` `:. (A_(2))/(A_(1)) = (2^(4))/(1^(4)) = (16)/(1)`

Discussion

47.	The ratio of anion radius to cation radius of a crystal is 10 : 9.3. Then, the coordination number of the cation in the crystal is
Answer» 2 8 6 4 Answer :B

Discussion

48.	The ratio between the root mean square velocity of H_(2) at 50 K and that of O_(2) at 800 K, is
Answer» 4 2 1 43469 Solution :(C ) `U_(rms)=sqrt((3RT)/(M))` `THEREFORE``(U_(1))/(U_(2))=sqrt((3RT_(1))/(M_(1))xx(M_(2))/(3RT_(2)))=sqrt((T_(1)M_(2))/(T_(2)M_(1)))=sqrt((50xx32)/(800xx2))=1`

Discussion

49.	The ratio between the root mean square velocity of H_(2) at 50 K and that of O_(2) at 800 K is:
Answer» 4 2 1 `1/4`. SOLUTION :1

Discussion

50.	The ratio between the rms velocity of H_(2) at 50K and that of O_(2) at 800K is:
Answer» 4 2 1 `(1)/(4)` ANSWER :C

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The ratio of the rates of diffusion of helium and methane under identical condition of pressure and temperature will be _____

The ratio of the R.M.S. Velocities of Hydrogen and Oxygen molecules at the same temperature is

The ratio of the radius of the first Bohr orbit for the electron orbiting the hydrogen nucleus to that of the electron orbiting the deuterium nucleus (mass nearly twice that of the hydrogen nucleus) is approximately

The ratio of the radius of H atom an H^(+)ion is nearly

The ratio of the radii of the first three orbits in an atom of hydrogen is

The ratio of the number of sp, sp^(2) and sp^(3)orbitals in the compound is CH_(3)-CH=C=CH-C -= C-CH_(3)

The ratio of the number of sp, sp2 and sp3 carbons in the compound given below is H_(2)C=C=CH-CH_3

The ratio of the number of hybrid and pure orbitals C_(6)H_(6) is

The ratio of the molar volume of the real gas to the molar volume of the same gas if it were ideal is called ……………………..

The ratio of the frequency corresponding to the third line in the Lymas series of hydrogen atomic spectrum to that of the first line in Balmer series of Li^(2+) spectrum is

The ratio of the kinetic energies of equal number of moles of H_(2)and He at the same temperature is

The ratio of the average molecular kinetic energy of UF_(6) to that of H_(2). Both at 300K is:

The ratio of specific charge of an electron to that of a hydrogen ion is

The ratio of specific charge of a proton and an alpha-particle is

The ratio of slopes of K_("max") vs. v and V_0 vs. v curves in the photoelectric effect gives (v= frequency , K_("max") = maximum kinetic energy , V_0 = stopping potential)

The ratio of sigma and pi bonds in benzene is

The ratio of root mean square velocity to average velocity of amolecule at a particular temperature is

The ratio of rates of diffusion of two gases x and y under similar conditions is 2:1. What will be the ratio of their average speeds if gas X is at -23^@C and gas y is at 273^@C?

The ratio of rates of diffusion of gases X and Y is 1 : 5 and that of Y and Z is 1 : 6. Then ratio of rates of diffusion Z and X is

The ratio of products, 1 - chloropropane to 2 - chloropropane respectively formed in the chlorination of propane if all the hydrogens are abstrated at equal rates is

The ratio of pure orbitals to hybridized orbitals in ethylene is

The ratio of products, 1-chloropropane to 2-chloropropane respectively formed in the chlorination of propane if all the hdrogens are abstracted at equal rates is

The ratio of number of sigma ( sigma) and pi (pi) bonds in 2-butynal is

The ratio of most probable velocity to the average velocity is

The ratio of masses of oxygen and nitrogen of a particular gaseous mixture is 1:4. The ratio of number of molecules is

The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1:4 The ratio of number of their molecule is :

A gaseous mixture contains oxygen and nitrogen in the ratio 1 : 4 by weight. Therefore, the ratio of the number of molecules is:

The ratio of mass percent of C and H of an organic compound (C_xH_yO_z) is 6 : 1. If one molecule of the above compound (C_xH_yO_z) contains half as much oxygen as required to burn one molecule of compound C_xH_y completely to CO_(2) and H_2O. The empirical formula of compound C_xH_yO_z is:

The ratio of magnetic moments of Fe(III) & Co(ll) is

The ratio of kinetic energies of lg of H_2 and 2g of CH_4 at the same temperature will be

The ratio of K_(p)//K_(c) for reaction CO_((g))+1/2O_(2(g))hArrCO_(2(g)) is

The ratio of hydrogen, deuterium and tritium is

The ratio of hybrid to pure orbitals in benzene molecule is

The ratio of hybrid and unhybrid orbitals involved in the bonding of a benzene molecule is

The ratio of energies of photons with wavelengths 2000A^(0) and 4000A^(0) is

The ratio of densities of hydrogen, deuterium and tritium under similar conditions of temperature and pressure

The ratio of densities of hydrogen, deuterium and tritium is

The ratio of de Broglic wavelengths of a deuterium atom to that of an a-particle, when the velocity of the former is five times greater than that of later, is

The ratio of charge to mass of an electron in coulombs per gram was determined by J.J. Thomson. He determined this ratio by measuring the deflection of cathode rays in electric and magnetic fields. What value did he find for this ratio?

The ratio of charge and mass would be greater for

The ratio of cationic radius to anionic radius in an ionic crystals is greater than 0.732. Its coordination number is

The ratio of average speed of an oxygen molcule to the RMS speed of a nitrogen molecule at the same temperature is

Comment over the following statement The ratio of atoms can vary in differently prepared samples of a compound.

The ratio of atomic mass of H and carbon is 1 : 3 in one hydrogen then its empirical formula is.....

The ratio of area covered by second orbital to the first orbital is

The ratio of anion radius to cation radius of a crystal is 10 : 9.3. Then, the coordination number of the cation in the crystal is

The ratio between the root mean square velocity of H_(2) at 50 K and that of O_(2) at 800 K, is

The ratio between the root mean square velocity of H_(2) at 50 K and that of O_(2) at 800 K is:

The ratio between the rms velocity of H_(2) at 50K and that of O_(2) at 800K is: