1
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

The correct stability order of the following free radicals is

A
$$\left(\mathrm{CH}_3\right)_2 \dot{\mathrm{C}} \mathrm{H}<\left(\mathrm{CH}_3\right)_3 \dot{\mathrm{C}}<\left(\mathrm{C}_6 \mathrm{H}_5\right)_3 \dot{\mathrm{C}}<\left(\mathrm{C}_6 \mathrm{H}_5\right)_2 \dot{\mathrm{C}} \mathrm{H}$$
B
$$\left(\mathrm{C}_6 \mathrm{H}_5\right)_2 \dot{\mathrm{C}} \mathrm{H}<\left(\mathrm{C}_6 \mathrm{H}_5\right)_3 \dot{\mathrm{C}}<\left(\mathrm{CH}_3\right)_3 \dot{\mathrm{C}}<\left(\mathrm{CH}_3\right)_2 \dot{\mathrm{C}} \mathrm{H}$$
C
$$\left(\mathrm{C}_6 \mathrm{H}_5\right)_3 \dot{\mathrm{C}}<\left(\mathrm{C}_6 \mathrm{H}_5\right)_2 \dot{\mathrm{C}} \mathrm{H}<\left(\mathrm{CH}_3\right)_3 \dot{\mathrm{C}}<\left(\mathrm{CH}_3\right)_2 \dot{\mathrm{C}} \mathrm{H}$$
D
$$\left(\mathrm{CH}_3\right)_2 \dot{\mathrm{C}} \mathrm{H}<\left(\mathrm{CH}_3\right)_3 \dot{\mathrm{C}}<\left(\mathrm{C}_6 \mathrm{H}_5\right)_2 \dot{\mathrm{C}} \mathrm{H}<\left(\mathrm{C}_6 \mathrm{H}_5\right)_3 \dot{\mathrm{C}}$$
2
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

The hybridization of carbon atoms in $$\mathrm{C}-\mathrm{C}$$ single bond of $$\mathrm{HC} \equiv \mathrm{C}-\mathrm{CH}=\mathrm{CH}_2$$ is

A
$$s p^3-s p^2$$
B
$$s p^2-s p^3$$
C
$$s p-s p^2$$
D
$$s p^3-s p^3$$
3
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

Which of the following groups is ortho and para directing?

A
$$-\mathrm{COCl}$$
B
$$-\mathrm{CHO}$$
C
$$-\mathrm{OH}$$
D
$$-\mathrm{COCH}_3$$
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