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Calcium lactate is a salt of weal organic acid and strong base represented as Ca(LaC)2. A saturated solution of Ca(LaC)2 contains 0.6 mole in 2 litre solution. pOH of solution is 5.60. If 90% dissociation of the salt takes place then what is pKa of lactic acid?
18
Nov
Calcium lactate is a salt of weal organic acid and strong base represented as Ca(LaC)2. A saturated solution of Ca(LaC)2 contains 0.6 mole in 2 litre solution. pOH of solution is 5.60. If 90% dissociation of the salt takes place then what is pKa of lactic acid? To what volume of 10 litre of 0.5 [...]
It takes 16 min to boil some water in an electric kettle. Due to some defect it becomes necessary to remove 10 % turns of the heating coil of the kettle. After repairs, how much time will it take to boil the same mass of water ?
18
Nov
It takes 16 min to boil some water in an electric kettle. Due to some defect it becomes necessary to remove 10 % turns of the heating coil of the kettle. After repairs, how much time will it take to boil the same mass of water ? how much time will it take to boil [...]
H3A is a weak triprotic acid (Ka1=10^−5, Ka2 = 10^−9, Ka3 = 10^−13 What is the value of pX of 0.1 M H3A (aq.) solution ? Where pX=-log X and X=[A^3−]/[HA^2−]
18
Nov
H3A is a weak triprotic acid (Ka1=10^−5, Ka2 = 10^−9, Ka3 = 10^−13 What is the value of pX of 0.1 M H3A (aq.) solution ? Where pX=-log X and X=[A^3−]/[HA^2−] H3A is a weak triprotic acid (Ka1=10^−5 Ka2 = 10^−9 Ka3 = 10^−13 What is the value of pX of 0.1 M H3A (aq.) [...]
If first dissociation of X(OH)3 is 100% whereas second dissociation is 50% and third dissociation is negligible then the pH of 4×10^−3 M X(OH)3 is :
18
Nov
If first dissociation of X(OH)3 is 100% whereas second dissociation is 50% and third dissociation is negligible then the pH of 4×10^−3 M X(OH)3 is : If first dissociation of X(OH)3 is 100% whereas second dissociation is 50% and third dissociation is negligible then the pH of 4×10^−3 M X(OH)3 is : November [...]
Calculate the ratio of HCOO^− and F^− in a mixture of 0.2 M HCOOH (Ka = 2×10^−4 ) and 0.1 M HF (Ka = 6.6×10^−4 )
18
Nov
Calculate the ratio of HCOO^− and F^− in a mixture of 0.2 M HCOOH (Ka = 2×10^−4 ) and 0.1 M HF (Ka = 6.6×10^−4 ) Calculate the ratio of HCOO^− and F^− in a mixture of 0.2 M HCOOH (Ka = 2×10^−4 ) and 0.1 M HF (Ka = 6.6×10^−4 ) November 18, 2020 [...]
What concentration of FCH2COOH, (Ka = 2.6 × 10^-3) is needed so that [H + ] = 2 × 10^-3 ?
18
Nov
What concentration of FCH2COOH, (Ka = 2.6 × 10^-3) is needed so that [H + ] = 2 × 10^-3 ? (Ka = 2.6 × 10^-3) is needed so that [H + ] = 2 × 10^-3 ? What concentration of FCH2COOH November 18, 2020 Category: Chapter 6 - Ionic Equilibrium (Level 1 and Level [...]
An upright object is placed at a distance of 40 cm in front of a convergent lens of focal length 20 cm. A convergent mirror of focal length 10 cm is placed at a distance of 60 cm on the other side of the lens. The position and size of the final image will be
17
Nov
An upright object is placed at a distance of 40 cm in front of a convergent lens of focal length 20 cm. A convergent mirror of focal length 10 cm is placed at a distance of 60 cm on the other side of the lens. The position and size of the final image will be [...]
If the ratio of amounts of scattering of two light waves is 1:4, the ratio of their wavelength is
17
Nov
If the ratio of amounts of scattering of two light waves is 1:4, the ratio of their wavelength is If the ratio of amounts of scattering of two light waves is 1:4 the ratio of their wavelength is November 17, 2020 Category: Cengage NEET by C.P Singh , Chapter 16 - Wave Motion and Waves [...]
A beam of unpolarised light is passed first through tourmaline crystal A and then through another tourmaline crystal B oriented so that its principal plane is parallel to that of A. The intensity of the emergent light is I. If A now rotated by 45∘ in a plane perpendicular to the direction of the incident ray, the intensity of the emergent light will be
17
Nov
A beam of unpolarised light is passed first through tourmaline crystal A and then through another tourmaline crystal B oriented so that its principal plane is parallel to that of A. The intensity of the emergent light is I. If A now rotated by 45∘ in a plane perpendicular to the direction of the incident [...]
Two polaroids are placed in the path of unpolarized beam of intensity I0 such that no light is emitted from the second polaroid. If a third polaroid whose polarization axis makes an angle θ with the polarization axis of first polaroid, is placed between these polariods then the intensity of light emerging from the last polaroid will be.
17
Nov
Two polaroids are placed in the path of unpolarized beam of intensity I0 such that no light is emitted from the second polaroid. If a third polaroid whose polarization axis makes an angle θ with the polarization axis of first polaroid, is placed between these polariods then the intensity of light emerging from the last [...]