Question
Direction: In the following Questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:
  1. Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  2. Both assertion and Reason are true but Reason is not the correct explanation of Assertion.
  3. Assertion is true but Reason is false.
  4. Both Assertion and Reason are false.
Assertion: A solution containing a mixture of acetic acid and sodium acetate maintains a constant value of pH on addition of small amounts of acid or alkali.
Reason: A solution containing a mixture of acetic acid and sodium acetate acts as a buffer solution around pH 4.75.

Answer

  1. Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

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Similar questions

Assertion (A): Sulphur present in an organic compound can be estimated quantitatively by Carius method.
Reason (R): Sulphur can be separated easily from other atoms in the molecule, by lassiagn's test, but the yellow precipitate cannot be obtained.
Assertion (A): Acetylene is acidic in nature.
Reason (R): Acetylene is sp hybridised.
Assertion (A): Electron deficient species that can accept lone pair of electrons known as an electrophile.
Reason (R): $\stackrel{\oplus}{N} H_4$ is an electrophile.
In the following Questions, the Assertion and Reason hrve been put forfiird. Read the statements csrefully end choose the correct alternative from the following:
  1. Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  2. Both Assertion rnd Reason are true but Reason is not the correct explenatlon of Assertion.
  3. Assertion is true but Reason is false.
  4. Both Assertion and Reason arc false.
Assertion: A Mixture of o-nitrophenol and p-nitrophenol can be separated by steam distillation.
Reason: p-nitrophenol is steam volatile while 0-nitrophenol is not steam volatile.
Note: In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given\ below each question.
Assertion (A): In the dissociation of PCl5 at constant pressure and temperature addition of helium at equilibrium increases the dissociation of PCl5.
Reason (R): Helium removes Cl2 from the field of action.
  1. Both A and R are true and R is correct explanation of A.
  2. Both A and R are true but R is not correct explanation of A.
  3. A is true but R is false.
  4. Both A and R are false.
Direction: In the following Questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:
  1. Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  2. Both assertion and Reason are true but Reason is not the correct explanation of Assertion.
  3. Assertion is true but Reason is false.
  4. Both Assertion and Reason are false.
Assertion: Increasing order of acidity of hydrogen halides is HF < HCl < HBr < HI
Reason: While comparing acids formed by the elements belonging to the same group of periodic table, H-A bond strength is a more important factor in determining acidity of an acid than the polar nature of the bond.
Assertion (A): Same number of electron pairs are present in resonance structures.
Reason (R): Resonance structures differ in the location of electrons around the constituent atoms.
Note: In the following questions a statement of Assertion (A) followed by a statement of reason (R) is given. Choose the correct option out of the choices given below each question.
Assertion (A): Generally, ionisation enthalpy increases from left to right in a period.
Reason (R): When successive electrons are added to the orbitals in the same principal quantum level, the shielding effect of inner core of electrons does not increase very much to compensate for the increased attraction of the electron to the nucleus.
  1. Assertion is correct statement and reason is wrong statement.
  2. Assertion and reason both are correct statements and reason is correct explanation of assertion.
  3. Assertion and reason both are wrong statements.
  4. Assertion is wrong statement and reason is correct statement.
Assertion (A): Splitting of the spectral lines in the presence of a magnetic field is known as the Stark effect.
Reason (R): The line spectrum is simplest for the hydrogen atoms.
Assertion (A): The IUPAC name for $CH _3 CH = CH - C \equiv CH$ is pent-3-en-1-yne and not pent-2-en-4-yne.
Reason (R): While deciding the locants for double and triple bonds, lowest sum rule is always followed.