UP Board Class 12 Chemistry Question Paper 2025 (Code 347 KC) Available- Download Here with Solution PDF

100 ml of 10 M HCl is mixed with 75 ml of 10 M Na\(_2\)CO\(_3\). The resulting solution would be –

• (A) acidic
• (B) basic
• (C) neutral
  (D) amphoteric

Number of unpaired electrons in Cu\(^{2+}\) (Z = 29) is –

• (A) 1
• (B) 2
• (C) 3
• (D) 4

Total how many ions are there in [Co(NH\(_3\))\(_5\)Cl]Cl\(_2\) solution?

• (A) 2
• (B) 3
  (C) 4
  (D) 5

Which compound of the following does not reduce Fehling's solution?

• (A) CH\(_3\)COOH
• (B) HCOOH
• (C) HCHO
• (D) CH\(_3\)CHO

How many primary amines are possible for the formula C\(_4\)H\(_{11}\)N?

• (A) 1
• (B) 2
• (C) 3
• (D) 4

Deficiency of which vitamin causes scurvy?

• (A) B
• (B) C
• (C) D
• (D) E

What is the relation between elevation in boiling point and molality?

Aqueous solutions of HgCl\(_2\) and SnCl\(_2\) cannot co-exist, why?

Prove with example that [Co(NH\(_3\))\(_5\)Cl]SO\(_4\) and [Co(NH\(_3\))\(_5\)SO\(_4\)]Cl are ionisation isomers.

Complete the following chemical equation: \(\; \mathrm{C_2H_5Br} \xrightarrow[]{\mathrm{KOH(aq)}} (A) \xrightarrow[\Delta]{\mathrm{K_2Cr_2O_7,\;H_2SO_4}} (B)\).

6 g urea is dissolved in 200 g water. Calculate the elevation in boiling point. Molal elevation constant for water is 0.52 K kg mol\(^{-1}\).

Write the names of the reagents used in the following reactions:

i) Conversion of benzyl alcohol into benzoic acid

ii) Formation of butan-2-ol from butan-2-one

How will you convert ethanol into the following compounds? Write chemical equation only.

(i) 3-Hydroxybutanol \quad (ii) But-2-enal

Ketones do not reduce Fehling's solution and Tollen's reagent while fructose containing ketonic group does. Why?

Write the definition of osmotic pressure. Calculate the osmotic pressure of 2% aqueous solution of urea at 27\(^\circ\)C. Solution constant \(R = 0.082\ L atm K^{-1}\ mol^{-1}\).

Explain Faraday's laws of electrolysis.

Decomposition of NH\(_3\) on the surface of platinum is a zero–order reaction. What will be the rate of formation of N\(_2\) and H\(_2\)? \; (Given: \(k=2.5\times10^{-4}\ \mathrm{mol\,L^{-1}\,s^{-1}}\))

Write the colour of the following ions in aqueous solution: (i) Zn\(^{2+}\) \quad (ii) Cu\(^{2+}\) \quad (iii) Fe\(^{2+}\).

What is electrode potential? Mention the factors affecting it.

Explain with example the difference between molecularity and order of reaction.

Write IUPAC names of the following:

(i) K\(_3\)[AlF\(_6\)]

(ii) [Fe(H\(_2\)O)\(_6\)]Cl\(_2\)

(iii) [Co(NH\(_3\))\(_5\)Cl]SO\(_4\)

(iv) K\(_3\)[Fe(CN)\(_6\)]

Write chemical equations of the reactions of formation of \(n\)-hexane, pentaacetyl glucose, glucose cyanohydrin and gluconic acid from glucose.

What happens when (Write chemical equation only):


(i) Silver propionate reacts with Br\(_2\) in CCl\(_4\):

(ii) Bromobenzene reacts with Mg in the presence of dry ether:

(iii) Methyl bromide reacts with KCN (alc.):

(iv) Ethyl bromide is heated with sodium ethoxide:

(v) Ethyl bromide reacts with silver acetate:

Write short notes on the following:

(i) Williamson's synthesis
(ii) Gattermann reaction
(iii) Kolbe's reaction

Write short notes on the following:

i) Wurtz reaction

ii) Wurtz-Fittig reaction

iii) Fittig reaction

How will you convert (Write chemical equation only):

(i) Propene into propan-2-ol \quad
(ii) Benzyl chloride into benzyl alcohol \quad
(iii) Phenol into 2,4,6-tribromophenol \quad
(iv) Phenol into picric acid \quad
(v) Salicylic acid into phenol

Complete the following equations:

(i)\; \(\mathrm{CH_3CHO} \xrightarrow{\;CH_3MgBr\;} (A) \xrightarrow{\;(B)\;} CH_3\!-\!CHOH\!-\!CH_3 \xrightarrow[\ \Delta\ ]{\;K_2Cr_2O_7/H_2SO_4\;} (C) \xrightarrow[\ \Delta\ ]{\;NH_2OH\;} (D)\)

(ii)\; \(\mathrm{C_6H_5CN + H_2O \xrightarrow{\;dil.\ H_2SO_4\;} (E)}\)

Write short notes on the following:

(i) Carbylamine reaction
(ii) Hofmann's bromamide reaction
(iii) Schmidt reaction

Complete the following reactions and write the names and formulae of A, B, C, D and E.

i) \((\mathrm{HCOO})_2\mathrm{Ca}\ \xrightarrow[Dry distillation]{}\ (A)\ \xrightarrow[NaOH]{}\ (B) + \mathrm{CH_3OH}\)

ii) \((\mathrm{CH_3COO})_2\mathrm{Ca} + (\mathrm{HCOO})_2\mathrm{Ca}\ \xrightarrow[Dry distillation]{}\ (C)\ \xrightarrow[\ \mathrm{HCN}\ ]{}\ (D)\ \xrightarrow[\ \mathrm{H_2O}\ ]{}\ (E)\)

How will you obtain Ethylamine from the following? Write chemical equation only:

(i) Methyl cyanide
(ii) Propanamide
(iii) Acetamide
(iv) Nitroethane
(v) Ethyl isocyanate