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26501.

The number of sigma bonds in cation of shwetzer salt is :-

Answer»

8
12
14
16

Answer :D
Discussion
26502.

The osmotic pressure of blood is 7.40 atm. at 27^@C . Number of mole of glucose to be used per liter for an intravenous injection that is to have the same osmotic pressure as blood is

Answer»

0.2
0.1
0.3
0.4

Answer :C
Discussion
26503.

The number of sigma-bonds in P_(4)O_(10) is:

Answer»

6
16
20
7

Answer :B
Discussion
26504.

The osmotic pressure of a solution is given by the relation

Answer»

`p=(RT)/(c )`
`p=(CT)/(R )`
`p=(RC)/(T)`
`(p)/(c )=RT`

ANSWER :D
Discussion
26505.

The number of sigma - bonds in P_4O_(10) is :

Answer»

6
16
20
7

Solution :
`"No. of "SIGMA" BONDS = 16"`
Discussion
26506.

The osmotic pressure of a solution contaiining 1.0 g protenin in 200 mL of aqueous solution at 27^(@)C has been found to be 2.0xx10^(-1)atm. Calculate the molecular mass of protein. (R=0.82 L atm mol^(-1)).

Answer»


Solution :`W_(B)=1.0g, V=200mL=0.2 L, T=273^(@)C=27+273=300K, pi=2.0xx10^(-1)ATM`
`R=0.082" L atm mol"^(-1)K^(-1),M_(B)=?`
`M_(B)=(W_(B)xxRxxT)/(pixxV)=((1G)xx(0.082" L atm K"^(-1)mol^(-1))xx(300K))/((2xx10^(-1)atm)xx(0.2L))=615.7" G mol"^(-1)`.
Discussion
26507.

The number of sigma and pi bonds in tetra - cyanoethene are :

Answer»

`5sigma`and `9 pi`
`5 SIGMA`and `8 pi`
`9 sigma`and`9 pi`
`9 sigma`and `7 pi`

Solution :
Total `9sigma`and `9pi`.
Discussion
26508.

The number of sigma and pi bonds in peroxodisulphuric acid are, respectively.

Answer»

9 and 4
11 and 4
4 and 8
4 and 9

ANSWER :B
Discussion
26509.

The osmotic pressure of a solution increases if,

Answer»

TEMPERATURE is lowered
Volume is INCREASED
Number of SOLUTE molecules is increased
None

Answer :C
Discussion
26510.

The number of sigma and pi bonds in orange azodye is ……. and ….... respectively.

Answer»

27 and 7
24 and 7
26 and 7
26 and 6

SOLUTION :
Discussion
26511.

The osmotic pressure of a solution at 273 K is 2.5 atm. The osmotic pressure of the same solution at 273^(@)C is :

Answer»

0.5 ATM
4 atm
5 atm
273 atm

Solution :` PI PROP T (2.5 " atm")/(pi.)=(273)/(546)` or `pi.=5` atm
Discussion
26512.

The osmotic, pressure of a solution can be accurately measure in the shortest possible time by:

Answer»

Berkrley and HARTLEY method
Morse and Frazer method
Pfeffer method
None

Answer :A
Discussion
26513.

The osmotic pressure of a solution at 0^(@)C is 4 atm. What will be its osmotic pressure at 546 K under similar conditions?

Answer»

4 ATM
2 atm
8 atm
1 atm

Answer :C
Discussion
26514.

The number of sigma and pi bonds in 1 - butene 3 - yne are:

Answer»

5 SIGMA and 5 PI
7 sigma and 3 pi
8 sigma and 2 pi
6 sigma and 4 pi

Answer :B
Discussion
26515.

The number of sigma and pi-bonds in 1-butene 3-yne are:

Answer»

5 sigma and 5pi
67sigma and 3 PI
8 sigma and 2 pi
6 sigma and 4 pi

Solution :`underset("1-butene, 3-yne")(H underset(sigma)-overset(H)overset(| sigma)(C)underset(pi)overset(sigma)=overset(H)overset(|sigma)(C)overset(sigma)-Cunderset(2pi)overset(sigma)-=C overset(sigma)-H) sigma` -BOND = 7, `pi` = bonds = 3
Discussion
26516.

The osmotic pressure of a solution at 0^@C is 2 atm. What will be its osmotic pressure at 273^@C under similar conditions:

Answer»

0.5 ATM
` 2 XX 273` atm
4 atm
`273//2` atm

Answer :C
Discussion
26517.

The number of sigma and pi bonds in 1, 3, 5, 7-octatetraene are respectively.

Answer»

17, 4
9, 3
16, 4
6, 4

Answer :A
Discussion
26518.

The osmotic pressure of a phenol solution in an organic solvent is deternined to be 20% less than expected, it is due to

Answer»

PHENOL is `20%`ionised
Phenol is `20%` dimerised
Phennol is `40%` dimerised
Phenol is `80%` dimerised

ANSWER :A
Discussion
26519.

The number of secondary hydrocarbons in 2,2-dimethyl butane is

Answer»

8
6
4
2

Solution :`UNDERSET"2,2-dimethyl BUTANE"(H_3C-undersetunderset(H)(|)oversetoversetH|C-undersetunderset(CH_3)(|)oversetoverset(CH_3)(|)C-CH_3)`
Discussion
26520.

The osmotic pressure of a dilute solution of a compound XY in water is four times that of a solution of 0.01 M BaCl_(2)in water. Assuming complete dissociation of the given ionic compounds in water, the concentration of XY(in "mol" L^(-1))in solution is:

Answer»

`4xx10^(-2)`
`6xx10^(-2)`
`4xx10^(-4)`
`16xx10^(-4)`

Solution :We know, `pi=iCRT, pi_(xy)=4pi_(BaCl_(2))`
`therefore 2[XY]=4xx(0.01)xx3`
`[XY]=0.06`
`=6xx10^(-3)"mol/L"`
Discussion
26521.

The osmotic pressure of a dilute solution is given by

Answer»

<P>`P=P_(o)x`
`pi V=nRT`
`DELTA P=P_(o)N_(2)`
`(Delta P)/(P_(o))=(P_(o)-P)/(P_(o))`

ANSWER :B
Discussion
26522.

The numberof sigmaand pi bond s I n the moleculeof tetracyanoethylene is :

Answer»

Nine `ALPHA`and nine `pi`BOND
FIVE`alpha` and nine `pi`bonds
Nine`alpha`and SEVEN `pi`bond
Five`alpha`and EIGTH `pi` bonds

Answer :A
Discussion
26523.

The number of sigma and pi bonds between two carbon atoms in calcium carbide are :

Answer»

ONE `SIGMA`, one `PI`
one `sigma`, TWO `pi`
two `sigma`, one `pi`
one `sigma, 1(1)/(2)pi`.

Answer :B
Discussion
26524.

The osmotic pressure of a dilute solution is given by :

Answer»

<P>P=`P_0 xx N_1`
`PIV = NRT`
`DELTAP = P_0N_2`
`(DeltaP)/(P_0)= (P_0-P_s)/(P_o)`

ANSWER :B
Discussion
26525.

The osmotic pressure of a decinormal solution of BaCl_(2) at 27^(@)C showing 80% degree of ionisation will be :

Answer»

3.20 ATM
4.20 atm
5. 20 atm
6.20 atm

ANSWER :A
Discussion
26526.

The number of second nearest Na^(+) ions neighbour of a Na^(+) ion in NaCl structure is

Answer»

12
6
8
4

Answer :A
Discussion
26527.

The osmotic pressure of a dilute solution is directly proportional to the:

Answer»

DIFFUSION rate of the solute
Ionic concentration
Boiling point
Flow of SOLVENT from a concentrated solution

Answer :B
Discussion
26528.

The number of secondary alcoholic group in glycerol is _________

Answer»

1
2
3
0

Answer :A
Discussion
26529.

The osmotic pressure of a dilte solution of a non-volatile solute is

Answer»

Directly PROPORTIONAL to its temperature on the CENTIGRADE SCALE
Inversely proportional to its temperature on the KELVIN scale
Directly proportional to its temperature on the Kelvin scale
Inversely proportional to its temperature on the centigrade scale

Answer :C
Discussion
26530.

The number of S-S bonds in sulphur trioxide trimer (S_3O_9) is:

Answer»

Three
Two
One
Zero

Answer :D
Discussion
26531.

The osmotic pressure of a 5% (wt./vol.) solution of cane sugar(mol.wt is 342) at 15^@C is:

Answer»

4 atm
3.4 atm
5.078 atm
2.45 atm

Answer :C
Discussion
26532.

The osmotic pressure of a 0.5 M solution of NaCl at 0^(@)C will be

Answer»

11.2 ATM
less than 11.7 atm
more than 11.2 atm
unpredictable.

Solution :`pi = CRT = 0.5 xx 0.0821 xx 273 = 11.2 "atm"`
This is APPLICABLE for a non-electrolyte but NACL being an electrolyte its O.P. will more than 11.2 atm DUE to ionisation.
Discussion
26533.

The osmotic pressure of a 3.5% solution of cane sugar at 150^(@)C is :

Answer»

4 ATM
3.4 atm
3.55 atm
2.45 atm

Solution :`PI = CRT=(3.5)/(342xx0.1)xx0.082xx423`
`=3.55` atm
Discussion
26534.

The number of S-S bonds in sulphur trioxide trimer S_(3)O_(9) is

Answer»

THREE
TWO
ONE
ZERO

ANSWER :D
Discussion
26535.

The osmotic pressure of 5% (mass/volume) solution of cane sugar at 50 degree celsius is

Answer»

2.51 atm
3 atm
3.88 atm
3.45 atm

Answer :C
Discussion
26536.

The number of S - O bonds in H_(2)S_(2)O_(8)……….

Answer»

10
12
9
8

Solution :
Discussion
26537.

The osmotic pressure of 5% aqueous solution of sugar (mol. Mass 342) at 15^@C is

Answer»

4 ATM.
3. 45 atm
3.75 atm
2.45 atm

Answer :B
Discussion
26538.

The number of S-S bonds in sulphur trioxide trimer (S_(3)O_(9)) is

Answer»

three
two
one
zero.

Solution :`SO_(3)` TRIMER has the STRUCTURE :
There is no `S-S` BOND.
Discussion
26539.

The number of S = O and S - OH bonds present in peroxodisulphuric acid and pyrosulphuric acid respectively are........

Answer»

(4 and 2) and (4 and 2)
(2 and 2) and (2 and 2)
(4 and 2) and (2 and 4)
(2 and 4) and (2 and 4)

ANSWER :A
Discussion
26540.

The osmotic pressure of 0.200 g of haemoglobin in 20.0 ml of solution is 2.88 torr at 25^(@)C. Calculate the molecular weight of haemoglobin.

Answer»


Solution :`"Molar conc. of haemoglobin (C)"=(0.200)/(M)xx(1000)/(20)"mol L"^(-1)","pi=CRT`
`"i.e.,"(2.88)/(760)" atm"=((10)/(M)" mol L"^(-1))xx("0.082 L atm K"^(-1)"mol"^(-1))xx(298K)"or"M="64484 G mol"^(-1)`
Discussion
26541.

The osmotic pressure of 0.1 M aqueous solution of NaCl is ……………. Osmotic pressure of 0.1 M aqueous solution of glucose

Answer»

equal to
less than
half of
nearly double

SOLUTION :`NaCl rarr Na^(+)+Cl^(-)`. HENCE, CONCENTRATION of PARTICLES in 0.1 M NaCl solution will be double and, therefore, OSMOTIC pressure will also be double.
Discussion
26542.

The osmotic pressure of 0.2 M KCl solution at 310 K is

Answer»

10.17 atm
5.084 atm
8.36 atm
12.2 atm

Answer :A
Discussion
26543.

The osmotic pressure of 5% aqueous solution of glucose (pi_(1)) is related to that of 5% aqueous solution of urea (pi_(2)) as

Answer»

`pi_(1)=pi_(2)`
`pi_(1) LT pi_(2)`
`pi_(1) gt pi_(2)`
`pi_(1)=pi_(2)//2`

SOLUTION :The molar concentration of 5% aqueous solutionof GLUCOSE is less than that of 5% aqueous solution of urea. Hence `pi_(1) lt pi_(2)`
Discussion
26544.

The number of resonating structures of arylammonium ion is

Answer»


SOLUTION :
Discussion
26545.

The osmotic pressure of 0.4% urea solution is 1.66 atm and that of a solution of sugar of 3.42% is 2.46 atm. When both the solution are mixed then the osmotic pressure of the resultant solution will be

Answer»

1.64 ATM
2.46 atm
2.06 atm
0.82 atm

SOLUTION :`PI=(1.66+2.46)/(2)=2.06` atm
Discussion
26546.

The osmotic pressure in atmospheres of 10% solution of canesugar at 69^(@)C is

Answer»

724
824
`8.21`
`7.21`

SOLUTION :`pi V = NRT`
`pi=(w)/(m)(RT)/(V)=(10)/(342)xx(0.821xx(273+69))/(0.1)=8.21` atm
Discussion
26547.

The osmotic pressure of 0.010 M solutions of Kl and of sucrose (C_(12)H_(22)O_(11)) are 0.432 atm and 0.24 atm respectively . The van't Hoff factor for Kl is :

Answer»

`1.80`
`0.80`
`1.2`
`1.0`

ANSWER :A
Discussion
26548.

The osmotic pressure (in atm.) of a 1 M solution a non-electrolyte at 0^(@)C will be

Answer»

1 atm
22.4 atm
0.0821 atm
76 atm

Solution :`PI = C. R. T.= 1 XX 0.0821 xx 273 = 22.4 "atm"`
Discussion
26549.

The number of revolutions/sec made by an electron in lind orbit is 8 times of the number of revolutions/sec made by an electron in n^"th" orbit. Give the value of "n".

Answer»


ANSWER :4
Discussion
26550.

The osmatic of solution containing non-volatile, non electrolyte solute is 7.6 atm at 27^(@)C then the boiling point of the same solution is _(Assume that molality and molarity are same)

Answer»

MOLARITY of the solution is 0.308M
boiling point of the solution is `100.32^(@)C`
Freezing point of the solution is `-0.573^(@)C`
At `27^(@)C`, the SOUTION is isotonic with `10%` (W/V) AQUEOUS urea solution .

ANSWER :A::C
Discussion