1
KCET 2021
MCQ (Single Correct Answer)
+1
-0

Bond enthalpies of $$A_2, B_2$$ and $$A B$$ are in the ratio $$2: 1: 2$$. If bond enthalpy of formation of $$A B$$ is $$-100 \mathrm{~kJ} \mathrm{~mol}^{-1}$$. The bond enthalpy of $$B_2$$ is

A
$$100 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
B
$$50 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
C
$$200 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
D
$$150 \mathrm{~kJ} \mathrm{~mol}^{-1}$$
2
KCET 2021
MCQ (Single Correct Answer)
+1
-0

The order of reactivity of the compounds $$\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}, \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}\left(\mathrm{C}_6 \mathrm{H}_5\right) \mathrm{Br}, \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}\left(\mathrm{CH}_3\right) \mathrm{Br}$$ and $$\mathrm{C}_6 \mathrm{H}_5 \mathrm{C}\left(\mathrm{CH}_3\right)\left(\mathrm{C}_6 \mathrm{H}_5\right) \mathrm{Br}$$ in $$\mathrm{S}_{\mathrm{N}} 2$$ reaction is

A
KCET 2021 Chemistry - Haloalkanes and Haloarenes Question 4 English Option 1
B
KCET 2021 Chemistry - Haloalkanes and Haloarenes Question 4 English Option 2
C
KCET 2021 Chemistry - Haloalkanes and Haloarenes Question 4 English Option 3
D
KCET 2021 Chemistry - Haloalkanes and Haloarenes Question 4 English Option 4
3
KCET 2021
MCQ (Single Correct Answer)
+1
-0

The major product of the following reaction is

$$\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{OH} \xrightarrow[\text { Excess }]{\mathrm{HBr}} \text { Product }$$

A
$$\mathrm{CH}_3-\mathrm{CHBr}-\mathrm{CH}_2 \mathrm{Br}$$
B
$$\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2 \mathrm{Br}$$
C
$$\mathrm{CH}_3-\mathrm{CHBr}-\mathrm{CH}_2-\mathrm{OH}$$
D
$$\mathrm{CH}_3-\mathrm{CHOH}-\mathrm{CH}_2 \mathrm{OH}$$
4
KCET 2021
MCQ (Single Correct Answer)
+1
-0

KCET 2021 Chemistry - Carboxylic Acids and Its Derivatives Question 4 English

The product '$$A$$' gives white precipitate when treated with bromine water. The product '$$B$$' is treated with barium hydroxide to give the product $$C$$. The compound $$C$$ is heated strongly to form product $$D$$. The product $$D$$ is

A
4-methylpent-3-en-2-one
B
but-2 enal
C
3-methylpent-3-en-2-one
D
2-methylbut-2-enal
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