CBSE Class 12 Chemistry 2025 Sample Paper Set 07 Solved

SECTION A

1. 18 g of glucose is (C₆H₁₂O₆)is dissolved in 1 kg of water ,the temperature at which this solution will boil at 1.013 bar is---- ( kb for water is 0.052Kkgmol^-1)
a. 373.202 k
b. 273.202 k
c. 373.098 k
d. 273.098 k

Answer : a

2. The charge required to reduce 1 mole of MgCl₂ is------
a. 289461C
b. 96487 C
c. 192974 C
d. 482435 C

Answer : c

3. which among the following is a colourless ion
a. Cr³⁺
b. Cu²⁺
c. Ti⁴⁺
d. Fe³⁺

Answer : c

4. Which among the following statements is not correct for a tetrahedral crystal field splitting.
a. energy of e > energy of t₂
b. rarely forms low spin compounds
c. energy of t₂ > energy of e
d. Δt < Δo

Answer : a

5. The IUPAC name of ionisation isomer of ( Co(NH₃)₅Cl)SO₄ is
a. Pentaammine chlorido cobalt (III)sulphate
b. b.Pentaammine sulphato cobalt(III) chloride
c. c.Pentaachlorido ammine cobalt (II) sulphate
d. Pentaammine chlorido cobalt (II) sulphate

Answer : b

6. Which of the following is most reactive towards nucleophilic substitution reaction?
a. C₆H₅Cl
b. CH₂=CHCl
c. ClCH₂CH=CH₂
d. CH₃CH=CHCl

Answer : c

7. The compound with highest boiling point is
a. Ethanol
b. Methanol
c..Methoxy methane
d. Propane

Answer : a

8. The product formed when Butanoic acd reacts with Cl₂ in presence of red phosphorous is
a. CH₃CH(Cl)CH₂ COOH
b. CH₃CH₂ CH(Cl)COOH
c. CH₃CH₂ CH(Cl)CH₂ COOH
d. CH₃CH(Cl)CH₂ COOH

Answer : b

9. Which among the following has only α D glucose as monomer
a. cellulose
b. starch
c. sucrose
d. Lactose

Answer : b

10. Which is a wrong Statement for a primary alcohol
a. Has less acidic strength than secondary alcohol
b. On oxidation with Alkaline KMnO₄ gives carboxylic acid
c. Does not react with Lucas reagent at room temperature
d. On reaction with SOCl₂ gives alkyl chloride

Answer : a

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