1
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

In a qualitative analysis, $\mathrm{Bi}^{3+}$ is detected by appearance of precipitate of $\mathrm{BiO}(\mathrm{OH})(\mathrm{s})$. Calculate pH when the following equilibrium exists at 298 K .

$$ \mathrm{BiO}(\mathrm{OH})(\mathrm{s}) \rightleftharpoons \mathrm{BiO}^{+}(\mathrm{aq})+\mathrm{OH}^{-}(\mathrm{aq}), \mathrm{K}=4 \times 10^{-10} $$

(Given : $\log 2=0.3010$ )

A

8.714

B

4.699

C

5.286

D

9.301

2
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

The correct statement with regard to the secondary structure of DNA/RNA is

A

RNA possesses a single strand helix structure and contains thymine as one of the four bases

B

DNA possesses a double strand helix structure and contains thymine as one of the four bases

C

RNA possesses a double strand helix structure and contains uracil as one of the four bases

D

DNA possesses a single strand helix structure and contains uracil as one of the four bases

3
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

The pair of molecules that are metamers among the following is :

A

$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{OH}$ and $\mathrm{CH}_3-\mathrm{CH}(\mathrm{OH})-\mathrm{CH}_3$

B

$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{CH}_3$ and $\left(\mathrm{CH}_3\right)_2 \mathrm{CHCH}_2 \mathrm{CH}_3$

C

NEET 2026 Chemistry - Alcohol, Phenols and Ethers Question 2 English Option 3

D

$$ \mathrm{CH}_3 \mathrm{OCH}_2 \mathrm{CH}_2 \mathrm{CH}_3 \text { and } \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OCH}_2 \mathrm{CH}_3 $$

4
NEET 2026
MCQ (Single Correct Answer)
+4
-1
Change Language

$$ \text { Match List I with List II : } $$

List-I
(Complex)
List-II
(Type of isomerism)
A. $$
\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]
$$
I. Optical
B. $$
\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}
$$
II. Solvate
C. $$
\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{NO}_2\right] \mathrm{Cl}_2
$$
III. Geometrical
D. $$
\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3
$$
IV. Linkage

Choose the correct answer from the options given below :

A

A-III, B-I, C-II, D-IV

B

A-I, B-III, C-II, D-IV

C

A-II, B-IV, C-III, D-I

D

A-III, B-I, C-IV, D-II