1
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

In a first-order reaction, the initial concentration of $A$ is $0.5 \mathrm{~mol} \mathrm{~L}^{-1}$. After 20 minutes, the concentration reduces to $0.4 \mathrm{~mol} \mathrm{~L}^{-1}$. The rate constant is (in $\mathrm{min}^{-1}$ ).

A

0.0051

B

0.0112

C

0.025

D

0.051

2
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

An unknown ester is hydrolysed to give ethanol as one of the products. Which chemical test can be used to confirm the identity of this alcohol?

A

2,4-DNP test

B

Tollen's test

C

lodoform test

D

Schiff's test

3
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

Which of the following pairs form the same osazone?

A

Glucose and fructose

B

Glucose and galactose

C

Glucose and arabinose

D

Lactose and maftose

4
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

Ozone is quantitatively determined by bubbling it through an excess of acidic potassium iodide solution, which liberates iodine. The liberated iodine is then titrated with sodium thiosulphate solution.

If 25.0 mL of the iodine-containing solution required 20.0 mL of 0.01 M sodium thiosulphate for complete titration, calculate the number of moles of ozone that reacted.

A

$1.00 \times 10^{-4} \mathrm{~mol}$

B

$2.00 \times 10^{-4} \mathrm{~mol}$

C

$3.00 \times 10^{-4} \mathrm{~mol}$

D

$5.00 \times 10^{-4} \mathrm{~mol}$

VITEEE Papers

All year-wise previous year question papers