Assertion: A future discovery of subatomic particles led to the failure of Dalton’s atomic theory.

Reason: An atom is made up of protons, neutrons and electrons.

Assertion and reason are correct, but Reason is not the correct explanation

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Assertion and reason are correct, and Reason is the correct explanation

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Assertion and reason both are wrong

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Assertion is wrong, but the reason is correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B
Assertion and reason are correct, and Reason is the correct explanation

One of the postulates of Dalton's atomic theory was that 'atoms are indivisible and indestructible'. A future discovery of subatomic particles led to the failure of Dalton’s atomic theory as an atom can be further subdivided into protons, neutrons and electrons.

Suggest Corrections

Similar questions

Assertion (A) Boiling points of alcohols and ethers are high.
Reason (R) They can form intermolecular hydrogen-bonding.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) Ethanol is a weaker acid than phenol.
Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) Phenols give o-and p-nitrophenol on nitration with conc. $H N O_{3} a n d H_{2} S O_{4}$ mixture.
Reason (R) - OH group in phenol is o-,p-directing.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) o-nitrophenol is less soluble in water than the m- and p-isomers.
Reason (R) m and p-nitrophenols exist as associated molecules.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) Bond angle in ethers is slightly less than the tetrahedral angle.
Reason (R) There is a repulsion between the two bulky (- R) groups.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Join BYJU'S Learning Program

Assertion: A future discovery of subatomic particles led to the failure of Dalton’s atomic theory. Reason: An atom is made up of protons, neutrons and electrons.

Assertion: A future discovery of subatomic particles led to the failure of Dalton’s atomic theory.

Reason: An atom is made up of protons, neutrons and electrons.