Which of the following compound is not in gaseous phase at 25\(^{\circ}\)C?

• (1) ClF
• (2) BrF\(_{3}\)
• (3) IF\(_{3}\)
• (4) ClF\(_{3}\)

A solution is prepared by dissolving 2 gram of non-volatile solute in 500 mL solution at 27\(^{\circ}\)C. The osmotic pressure of the solution is 0.82 atm. The molar mass of the solute is:

• (1) 100 g mol\(^{-1}\)
• (2) 120 g mol\(^{-1}\)
• (3) 150 g mol\(^{-1}\)
• (4) 180 g mol\(^{-1}\)

What is the oxidation state of sulfur in Marshall's acid, H\(_{2}\)S\(_{2}\)O\(_{8}\)?

• (1) +4
• (2) +5
• (3) +6
• (4) +7

What is formed when an alkyl cyanide reacts with sodium in ether?

• (1) Primary amine
• (2) Secondary amine
• (3) Alkene
• (4) Alcohol

Which of the following is not amphoteric in nature?

• (1) NH\(_{3}\)
• (2) HCl
• (3) H\(_{2}\)O
• (4) Cr\(_{2}\)O\(_{3}\)

The rate of reaction A \(\rightarrow\) P is 1.25 \(\times\) 10\(^{-2}\) mol dm\(^{-3}\)s\(^{-1}\) when [A] = 0.5 M. Calculate the rate constant if the reaction is second order in A.

• (1) 0.05
• (2) 0.04
• (3) 0.03
• (5) 0.01

Identify the unit of rate constant for a first-order reaction.

• (1) mol dm\(^{-3}\) s\(^{-1}\)
• (2) s\(^{-1}\)
• (3) mol\(^{-1}\) dm\(^{3}\) s\(^{-1}\)
• (4) mol dm\(^{-3}\)

The magnetic moment of Cr\(^{3+}\) ion is 3.87 BM. The number of unpaired electrons present is:

• (1) 1
• (2) 2
• (3) 3
• (4) 4

Oil of wintergreen is chemically known as:

• (1) Methyl acetate
• (2) Methyl salicylate
• (3) Ethyl salicylate
• (4) Salicylic acid

Which of the following does not belong to Group 16 elements?

• (1) Oxygen
• (2) Sulfur
• (3) Selenium
• (4) Chlorine