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JUNE 2024 Chemistry - JUNE 2024

Gujarat Board (GSEB) - STD 12 Science - Chemistry (GSEB - English Medium). 77 questions in this chapter.

Question types

JUNE 2024 question types

77 questions across 4 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.

77
Questions
4
Question groups
5
Question types
Sample Questions

JUNE 2024 questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 103 Marks Question3 Marks
Although chlorine is an electron withdrawing group, yet it is ortho, para directing in electrophilic aromatic substitution reaction, Explain.
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Q 114 Marks Questions4 Marks
An organic compound with the molecular formula C8H8O forms 2,4-DNP derivative, reduce Tollen's reagent and undergoes cannizzaro reaction. On vigorous oxidation it gives 1, 4 benzene di-carboxylic acid. Identify the compound and write the equation for the reactions involved..
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Q 134 Marks Questions4 Marks
The time required for $10 \%$ completion of a first order reaction at 298 K is equal to that required for its $25 \%$ completion at 308 K . Calculate the value of energy of activation for the reaction.
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Q 144 Marks Questions4 Marks
Explain on the basis of valance bond theory that $\left[ Ni ( CN )_4\right]^2$ ion with square planar structure and the $\left[ NiCl _4\right]^2$ ion with tetrahydral geometry.
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Q 17M.C.Q (1 Marks)1 Mark
Which compound has the highest reactivity towards SN1 reaction?
  • A
    $C _6 H _5 CH \left( C _6 H _5\right) Br$
  • ✓
    $C _6 H _3 C \left( CH _3\right)\left( C _4 H _4\right) Br ^0$
  • C
    C6H5CH2Br
  • D
    $C _6 H _4 CH ( CH ) Br$

Answer: B.

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Q 19M.C.Q (1 Marks)1 Mark
What is the value of slope of plot $\operatorname{InK} \rightarrow \frac{1}{T}$ for reaction having $E _{ a }=33.256 J$ ?
  • A
    $-1.74$
  • ✓
    $-4$
  • C
    1.74
  • D
    4

Answer: B.

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Q 20M.C.Q (1 Marks)1 Mark
For a first order reaction half life period is 5 min. What time it will take to 99.9% completion of reaction?
  • A
    40 min
  • B
    25 min
  • C
    20 min
  • ✓
    50 min

Answer: D.

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