1
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

$$ 1 \mathrm{~cm}^3 \text { of } 0.01 \mathrm{~M} \mathrm{~HCl} \text { is added to } 1 \mathrm{~L} \text { of } \mathrm{NaCl} \text { solution. The } \mathrm{pH} \text { of the resulting solution is: } $$

A
5
B
3
C
1
D
2
2
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

An organic compound with molecular formula $$\mathrm{C}_3 \mathrm{H}_5 \mathrm{N}$$ on hydrolysis gives compound '$$\mathrm{X}$$' which on treatment with $$\mathrm{Cl}_2 / \mathrm{P}$$ gives compound '$$\mathrm{Y}$$'. Compound '$$\mathrm{Y}$$' on reaction with $$\mathrm{NH}_3$$ gives '$$\mathrm{Z}$$'. The compound '$$\mathrm{Z}$$' is :

A
2-aminopropanoic acid
B
2-nitropropane
C
1-hydroxypropane
D
1-chloropropane
3
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following carbanions is the least stable?

A
$$\left(\mathrm{CH}_3\right)_2 \mathrm{CH}^{-}$$
B
$$\mathrm{C}_6 \mathrm{H}_5^{-}$$
C
$$\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2^{-}$$
D
$$\mathrm{CH}_2=\mathrm{CHCH}_2^{-}$$
4
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The correct order of increasing melting point is

A
$$\mathrm{Cr}<\mathrm{Ti}<\mathrm{V}<\mathrm{Mn}$$
B
$$\mathrm{Mn}<\mathrm{Ti}<\mathrm{V}<\mathrm{Cr}$$
C
$$\mathrm{Ti}<\mathrm{V}<\mathrm{Cr}<\mathrm{Mn}$$
D
$$\mathrm{V}<\mathrm{Ti}<\mathrm{Mn}<\mathrm{Cr}$$
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