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.
| 24501. |
The ratio of 'd' values in NaCl crystal is |
|
Answer» `0.707 : 1 : 1.154` |
|
| 24502. |
The ratio of Cu and Sn metals in bronze |
|
Answer» |
|
| 24503. |
The ratio of CN and OS of x in [x(NH_(3))_(5)SO_(4)]Cl is |
|
Answer» |
|
| 24504. |
The ratio of cis and trans-isomers of the complex [Ma_(2)bcde]^(n+-) is: |
|
Answer» `5:3` No. off cis-isomers=6 They are: No. off trans-isomers=3 |
|
| 24505. |
The ratio of closed packed atoms to tetrahedral holes in cubic close packing is: |
|
Answer» `1:1` |
|
| 24506. |
The ratio of close packed atoms to tetahedral hole in cubic packing is …………. |
|
Answer» `1:1` The number of TETRAHEDRAL holes formed = 2N Number of OCTAHEDRAL holes formed = N. THEREFORE `N:2N=1:2` |
|
| 24507. |
The ratio of cations to anion in a octahedral close packing is : |
|
Answer» 0.414 |
|
| 24508. |
The ratio of cations to anion in a closed pack tetrahedral is- |
|
Answer» 0.414 |
|
| 24509. |
The ratio of cations to anion in a closed pack tetrahedral is : |
|
Answer» 1 |
|
| 24510. |
The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. its coordination number is |
|
Answer» 6 |
|
| 24511. |
The ratio of C^(14)//C^(12) in dead tissue is less than that in fresh tissue. |
|
Answer» |
|
| 24512. |
The ratio of carbon, hydrogen and oxygen in 2- methyl benzoic acid is: |
|
Answer» (4:4:2) |
|
| 24513. |
The ratio of Boyle's temperature and critical temperature for a gas is : |
|
Answer» 8/27 |
|
| 24514. |
The ratio of average speed of an oxygen molecular to the r.m.s. speed of a N_(2) molecular at the same temperature is : |
|
Answer» `((3PI )/( 7) )^(1//2)` `u_("rms") ` or `N_(2) = sqrt(( 3RT)/( M)) = sqrt(( 3RT)/( 28))` `( u_(av))/( u_("rms")) = sqrt((8RT)/(pi xx 32))xxsqrt((28)/( 3RT)) = (7^(1/2))/( 3pi)` |
|
| 24515. |
The ratio of average speed and most probable speed is : |
|
Answer» `2 // SQRT( pi)` |
|
| 24516. |
The ratio of area covered by second orbit to the first orbit in hydrogen atom is :- |
|
Answer» 0.043055555555556 |
|
| 24517. |
The ratio of any colligative property for KCl solution to that of sugar solution of same molality is |
|
Answer» 1 |
|
| 24518. |
The ratio of activities of two radionuclides X and Y in a mixture at time t=0 was found to be 8:1 after two hour's the ratio of activities become 1:1. If the t_(1//2) of radionuclide X is 20 min find the t_(1//2)[in minutes] of radionuclide Y. |
|
Answer» |
|
| 24519. |
Ratio of the amounts of H_(2)S needed to precipitate all the metal ions from 100 ml of 1M AgNO_(3) and 100 ml of 1M CuSO_(4) will be : |
|
Answer» `1:2` |
|
| 24520. |
The ratio of amounts of H_(2)S needed to precipitate all the metal ions from 100 ml of 1 M AgNO_(3) and 100 ml of 1 M CuSO_(4) will be |
|
Answer» `1:2` `2KMnO_(4)+3H_(2)SO_(4) to K_(2)SO_(4)+2MnSO_(4)+3H_(2)O+5(O)` `2xx158=(316xx8)/(80)=31.6` So, equivalent wt. of `KMnO_(4)` in acidic medium is `=31.6`gm |
|
| 24521. |
The ratio fo fraction of molecules present in the velocity range 450 m/sec to (450+0.01) m/sec for O_(2) at 100K and SO_(2) present at 200 K is : |
| Answer» Solution :Since `(T)/(M)` RATIO for both `O_(2)` at 100K and `SO_(2)` at 200K is same, curve will be same for both `&` ratio=1. | |
| 24522. |
The ratio gamma((C_(P))/(C_(V))) for iner gases is |
|
Answer» 1.33 |
|
| 24523. |
The ratio C_p//C_vfor noble gases is |
|
Answer» 1.67 |
|
| 24524. |
The ratio between the root mean square velocity of H_(2) at 50K and that of O_(2) at 800K is |
|
Answer» 4 `m ( O_(2)) = sqrt(( 3R xx 800)/( 32))` `( mu ( H_(2)))/( mu ( O_(2))) = sqrt(( 3R xx 500)/( 2) ) xx sqrt( ( 32 ) /( 3R xx 800))` `= sqrt(( 500 xx 32)/( 2 xx 800)) = 1 ` |
|
| 24525. |
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 |
|
| 24526. |
The ratio between the root mean square speed of H_2 at 50k and that of O_2 at 800k is : |
|
Answer» 4 |
|
| 24527. |
The ratio between the maximum tolerated dose of a drug and a minimum curative dose is called |
|
Answer» ISO electric point |
|
| 24528. |
The van der Walls' equation explains the behaviour of : |
|
Answer» ATM litre `mol^(-1)` |
|
| 24529. |
The rates of reaction invrease with increase of temperature because |
|
Answer» activation ENERGY of the REACTION molecules decreases |
|
| 24530. |
The rates of most the reactions double when the temperature is raised from 298 K to 308 K Calculate their activation energy. |
|
Answer» Solution :From ARRHENIUS EQUATION ,we know `"LOG"K_1/K_2=E_a/(2.303R)[1/T_1-1/T_2]` Here `K_2/K_1=2,T_1=298K,T_2=308K`.SUBSTITUTING the values,we get `"log"2=E_a/(2.303xx8.314JK^-1mol_^-1)[(T_2-T_1)/(T_1T_2)]` `E_a=`52897.7mol^-1=52.89kj` MOL. |
|
| 24531. |
The rates of effusion of two gases A and B under the same conditions of temperature and pressure are in the ratio gamma_A : gamma_B= 2: 1. What would be the ratio of the rms speeds of molecules of A and B if T_A : T_B = 2 : 1? |
| Answer» SOLUTION :`2 SQRT2 : 1` | |
| 24532. |
The rate of most reactions become double when their temperature is raised from 298 K to 308 K. Calculate their activation energy. (Given, R = 8.314" J mol"^(-1) ) |
|
Answer» Solution :From Arrhenius EQUATION ,we KNOW `"log"K_1/K_2=E_a/(2.303R)[1/T_1-1/T_2]` Here `K_2/K_1=2,T_1=298K,T_2=308K`.Substituting the values,we get `"log"2=E_a/(2.303xx8.314JK^-1mol_^-1)[(T_2-T_1)/(T_1T_2)]` `E_a=`52897.7mol^-1=52.89kj` MOL. |
|
| 24533. |
The rates of diffusion ofSO_2 , CO_2 , PCl_3 ,SO_3 are in the following order : |
|
Answer» `PCl_3 GT SO_3 gt SO_2 gt CO_2` |
|
| 24534. |
The rates of a reaction starting with intial conentrations of 2xx10^(-3) M and 1xx10^(-3) M are equal to 2.40xx10^(-4) M s^(-1) and 0.60xx10^(-4) M s^(-1) respectively. Calculate the order of the reaction with respect to the reactant and also the rate constant. |
|
Answer» Solution :If N is the order of reaction RATE `=k[A_(0)]^(n)=kC^(n)` For two different initialconcentrations, we have `(r_(1))/(r_(2))=((C_(1))/(C_(2)))^(n):.log""(r_(1))/(r_(2))=nlog""(C_(1))/(C_(2))` or `""n=(log(r_(1)//r_(2)))/(log(C_(1)//C_(2)))=(log(2.4xx10^(-4)//0.6xx10^(-4)))/(log(2xx10^(-3)//1xx10^(-3)))=(LOG4)/(log2)=2` Hence, orderof reaction = 2 Rate `=k[A_(0)]^(2)` `k=("Rate")/([A_(0)]^(2))=(2.4xx10^(-4)"mol L"^(-1)s^(-1))/((2xx10^(-3)"mol L"^(-1))^(2))=0.6xx10^(2)"L mil"^(-1)s^(-1)` |
|
| 24535. |
The rates of diffusion of O_2 and H_2 at same P and T are the ratio : |
|
Answer» 1:4 |
|
| 24536. |
The rate ofreaction at different times are as follows : [[time(sec),0,10,20,30],[rate(Msec^-),1.5xx10^-2,1.48xx10^-2,1.51xx10^-2,1.49xx10^-2]] The reaction is |
|
Answer» ZERO prder |
|
| 24537. |
The rate of the reation is expressed in different way as followed : -1/m . (d[A])/(dt)=+(1)/(n)(d[B])/(dt)=- (1)/(p)(d[C])/(dt)=+ 1/q (d[D])/(dt) The reaction is |
|
Answer» `na+mB rarr pC+qD` B and D are the product of the reaction because their concentration increases with time hence (PLUS sign) . 'm' and 'p' are the STOICHIOMETRIC coefficients of A and C while 'n' and 'q' are the coefficients of products B and D . So, the equation of the reaction BECOMES : `mA + pC to n B + qD`. |
|
| 24538. |
The rate of the reaction x+2yrarr product is 4xx10^(-3) " mol L"^(-1)s^(-1) , if [x] = [y] =0.2 M and rate constant at 400K is 2xx10^(-2)s^(-1) , what is the overall order of the reaction. |
|
Answer» Solution :Rate `=K[x]^n[y]^m` `4xx10^(-3)"mol"L^(-1)s^(-1)=2xx10^(-2)s^(-1)(0.2 "mol L"^(-1))^n(0.2 "mol L"^(-1))^m` `(4xx10^(-3)"mol L"^(-1)s^(-1))/(2xx10^(-2)s^(-1))=(0.2)^(n+m)("mol L"^(-1))^(n+m)` `2.0("mol L"^(-1))=(0.2)^(n+m)("mol L"^(-1))^(n+m)` Comparing the powers on both sides , the overall order of the REACTION n + m = 1 |
|
| 24539. |
The rate of the reaction X to Y becomes 8 times when the concentration of the reactant 'X' is doubled . The rate law of the reaction is ……….. |
|
Answer» `- (d [X])/(dt) = k [X]^(2)` |
|
| 24540. |
The rate of the reaction X rarrY becomes 8 times when the concentration of the reactant 'X' is doubled . The rate law of the reaction is ............ |
|
Answer» `-(d[X])/(dt)=K[X]^2` |
|
| 24541. |
The rate of the reaction A to products , at the intitial concentrations of 3.24 xx 10^(-2)M is nine times its rate at constant initial concentration of 1.2 xx 10^(-3)M . The order of the reaction is |
|
Answer» `(1)/(2)` `r = k(1.2 xx 10^(-3))^(alpha) "" …. (ii)` DIVIDE EQ. (i) by (ii) `(9r)/(r) = (k(3.24 xx 10^(-2))^(alpha))/(k (1.2 xx 10^(-3))^(alpha)) implies 3^(2) = 3^(3alpha)` `THEREFORE alpha = (2)/(3)`. |
|
| 24542. |
The rate of the reaction A toProducts, at the initial concentration of 3.24xx10^(-2) M is nine times its rate at another initial concentration of 1.2xx10^(-3) M. The order of the reaction is |
|
Answer» `(1)/(2)` `r = k(1* 2 xx 10^(-3))^(n)""…(ii)` DIVIDING (i) by (ii), ` 9 = ((3.24 xx 10^(-2))/(1*2 xx 10^(-3)))^(n) or 9 = (27)^(n)` or `(3)^(2) = (3^(3))^(n) = (3)^(3N).` Hence, `3 n = 2 or n = 2//3`. |
|
| 24543. |
The rate of the reactionA + B to 3Cgets increased by 72 times when the concentration of A is tripled and that of B is doubled . The order of the reaction with respect to A and B are -- and --- respectively |
|
Answer» 1,2 |
|
| 24544. |
The rate of the reaction A rarr Products at the initial concentration of 3.24 xx10^(-2) M is nine times its rate at another initial concentration of 1.2xx10^(-3) M. The order of the reaction is |
|
Answer» `(1)/(2)` `r = k(1.2xx10^(-3))^(a)"" cdots(i) ` `9r= k(3.24xx10^(-2))^(a) "" cdots(II)` DIVIDING eq (ii) by eq. (i) `9=((3.24xx10^(2))^(a))/((1.2xx10^(-3))^(a))=27^(a)` or` 3^(2)=3^(3A)` `:. 3a=2 "or" a =2//3` |
|
| 24545. |
The rate of the reaction,A+B+Crarr products, is given byr=(-d[A])/(dt)=k[A]^(1//2)[B]^(1//3)[C]^(1//4). The order of the reaction is |
| Answer» SOLUTION : ORDER of REACTION `=1/2+1/3+1/4=(6+4+3)/(12)=(13)/(12)` | |
| 24546. |
The rate of the reaction 2N_(2)O_(5) to 4NO_(2)+O_(2) can be written in three ways (-d[N_(2)O_(5)])/(dt)=k[N_(2)O_(5)],(d[N_(2)O_(5)])/(dt)=k'[N_(2)O_(5)](d[O_(2)])/(dt)=k''[N_(2)O_(5)] The relationship between k and k' and between k and k'' are |
|
Answer» `K'=2K,k'=k` |
|
| 24547. |
The rate of the reaction 2N_(2)O_(5) to 4 NO_(2) + O_(2) can be written in three ways (-d [N_(2)O_(5)])/(dt) = k [N_(2)O_(5)] (d [NO_(2)])/(dt) = k' [N_(2)O_(5)] (d[O_(2)])/(dt ) = k'' [N_(2)O_(5)] The relationship between k and k' and between k and k'' are |
|
Answer» k' = 2K , k''= 2k `(1)/(2) k (N_(2)O_(5)) = (1)/(2) k' (N_(2)O_(5)) = k'' (N_(2)O_(5))` `(k)/(2) = (k')/(4) = k'' implies k' = 2k , k'' = (k)/(2)`. |
|
| 24548. |
The rate of the reaction 2SO_(2) +O_(2) rarr 2SO_(3) may be expressed as : -(d[O_(2)])/(dt)= 2.5 xx10^(-4) "mol L"^(-1) "sec"^(-1) The rate of reaction when expressed in terms of SO_(3) will be : |
|
Answer» `-5.0xx10^(-4) "mol L"^(-1) "SEC"^(-1)` `(d[SO_(2)])/(dt)=2 (d[O_(2)])/(dt)` `=2xx2.5 xx10^(-4) ` `= 5.0 xx10^(-4)mol L^(-1) sec^(-I)` |
|
| 24549. |
The rate of the reaction 2 NO+Cl_(2)to2NOCl is given by the rate equation : rate =k[NO]^(2)[Cl_(2)]. Thevalue of the rate constant can be increased by |
|
Answer» increasing the temperature |
|
| 24550. |
The rate of the reaction 2 NO + Cl_(2) to 2 NOCl is given by the rate equation rate = k [NO]^(2) [Cl_(2)] The value of the rate constant can be increased by |
|
Answer» INCREASING the temperature |
|