1
KCET 2024
MCQ (Single Correct Answer)
+1
-0

PCC is

A
$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ + Pyridine
B
$\mathrm{CrO}_3+\mathrm{CHCl}_3$
C
$\mathrm{CrO}_3+\mathrm{H}_2 \mathrm{SO}_4$
D
A complex of chromium trioxide with pyridine $+\mathrm{HCl}$
2
KCET 2023
MCQ (Single Correct Answer)
+1
-0

$$\begin{aligned} & \mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_2 \mathrm{OH} \stackrel{\mathrm{PCC}}{\longrightarrow} \\\\ & \mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CHO} \end{aligned}$$

Hybridisation change involved at $$\mathrm{C}$$-$$1$$ in the above reaction.

A
$$s p^3$$ to $$s p$$
B
$$s p^2$$ to $$s p^3$$
C
$$s p^3$$ to $$s p^2$$
D
$$s p$$ to $$s p^2$$
3
KCET 2023
MCQ (Single Correct Answer)
+1
-0

A better reagent to oxidise primary alcohols into aldehyde is

A
PCC
B
Alkaline $$\mathrm{KMnO}_4$$
C
Acidified $$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$$
D
$$\mathrm{CrO}_3$$
4
KCET 2023
MCQ (Single Correct Answer)
+1
-0

KCET 2023 Chemistry - Alcohol, Phenols and Ethers Question 28 English

Y in the above reaction is

A
salicylaldehyde
B
aspirin
C
cumene
D
picric acid

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