1
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

From the following identify the groups that exhibit negative resonance $(-R)$ effect when attached to conjugated system

$$ \begin{array}{ccccc} \text { Formyl } & \text { Amino } & \text { Alkoxy } & \text { Cyano } & \text { Nitro } \\ A & B & C & D & E \end{array} $$

A
A, C, E only
B
B, C, D only
C
A, D, E only
D
B, D, E only
2
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
A dibromide $X\left(\mathrm{C}_4 \mathrm{H}_4 \mathrm{Br}_2\right)$ on dehydrohalogenation gave $Y$ which on reduction with $Z$ gave non-polar isomer of $\mathrm{C}_4 \mathrm{H}_3$. What are $X$ and $Z$ respectively?
A

AP EAPCET 2024 - 18th May Morning Shift Chemistry - Alcohol, Phenols and Ethers Question 2 English Option 1

B

AP EAPCET 2024 - 18th May Morning Shift Chemistry - Alcohol, Phenols and Ethers Question 2 English Option 2

C

AP EAPCET 2024 - 18th May Morning Shift Chemistry - Alcohol, Phenols and Ethers Question 2 English Option 3

D

AP EAPCET 2024 - 18th May Morning Shift Chemistry - Alcohol, Phenols and Ethers Question 2 English Option 4

3
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The diffraction pattern of crystalline solid gave a peak at $20=60^{\circ}$. What is the distance ( in cm ) between the layers which gave this peak?

( $\lambda$ of $X$-rays is $1.54 \mathring{A}$ ) $\left(\sin 30^{\circ}=0.5, \sin 60^{\circ}=0.866 ; n=1\right)$

(a) $8.89 \times 10^{-8}$
A
$8.89 \times 10^{-9}$
B
$8.89 \times 10^{-1}$
C
$1.54 \times 10^{-8}$
D
1.54
4
AP EAPCET 2024 - 18th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The concentration of 1 L of $\mathrm{CaCO}_3$ solution is 1000 ppm . What is its concentration in mol $\mathrm{L}^{-1}$ ?

$$ (\mathrm{Ca}=40 \mathrm{u}, \mathrm{O}=16 \mathrm{u}, \mathrm{C}=12 \mathrm{u}) $$

A
$10^{-3}$
B
$10^{-1}$
C
$10^{-4}$
D
$10^{-2}$
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