Download App

MODEL PAPER 9 — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryMODEL PAPER 91 Mark
Question
Assertion (A): Ortho-nitrophenol is more acidic than phenol.
Reason (R): Nitro group is electron donating group and therefore stabilizes ortho-nitrophenoxide ion.
✓

Answer

(c) A is true but R is false.
Explanation: A is true but R is false.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Assertion (A) & Reason (B) MCQ" from MODEL PAPER 9→MODEL PAPER 9 — all question types→Chemistry STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
  1. Assertion and reason both are correct statements and reason is correct explanation for assertion.
  2. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  3. Assertion is correct statement but reason is wrong statement.
  4. Assertion is wrong statement but reason is correct statement.
Assertion: The ease of dehydration of alcohols follows the order: Primary > Secondary > Tertiary.
Reason: Dehydration proceeds through the formation of carbocations.
→
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Amino acids are insoluble in benzene and ether.
Reason: Amino acids exist as zwitter ions.
→
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Solutions having the same osmotic pressure are called isotonic solutions.
Reason: $Ca^{2+}$ and $K^+$ ions are responsible for maintaining proper osmotic pressure balance in the cells of organism.
→
Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: $\ce{KCN}$ reacts with methyl chloride to give methyl isocyanide
Reason: $CN^-$ is an ambident nucleophile.
→
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Aqueous solution of potassium ferrocyanide does not give the test of iron $(II).$
Reason: Potassium ferrocyanide is not poisonous like potassium cyanide.
→
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Controlled nitration of aniline at low temperature mainly gives $m-$ nitroaniline.
Reason: In acidic medium $, \ce{-NH_2}$ group gets converted into $m-$ directing group.
→
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
  1. Assertion and reason both are correct statements and reason is correct explanation for assertion.
  2. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  3. Assertion is correct statement but reason is wrong statement.
  4. Assertion is wrong statement but reason is correct statement.
Assertion: Fluoroacetic acid is stronger than chloroacetic acid.
Reason: Carboxylic acids are weak acids and turn blue litmus red.
→
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: $\ce{CH_3OCH_3}$ and $\ce{C_2H_5OH}$ has comparable molecular weight but boiling point of $\ce{C_2H_5OH}$ is more than dimethyl ether.
Reason: $\ce{C_2H_5OH}$ forms intermolecular $H-$bonding while $\ce{CH_3OCH_3}$ forms intramolecular $H-$bonding.
→
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: $\ce{[Ti(H_2O)_6]^{3+}}$ is coloured while $\ce{[Sc(H_2O)_6]^{3+}}$ is colourless.
Reason: $d - d$ transition is not possible in $\ce{[Sc(H_2O)_6]^{3+}}.$
→
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
  1. Assertion and reason both are correct statements and reason is correct explanation for assertion.
  2. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  3. Assertion is correct statement but reason is wrong statement.
  4. Assertion is wrong statement but reason is correct statement.
Assertion: Benzaldehyde undergoes aldol condensation
Reason: Aldehydes having $\alpha$-hydrogen atom undergo aldol condensation.
→