The hybridization state of C atom in butendioic acid is

• sp²

• sp³

• Both (a) and (b)

• sp

The conjugate acid of HS^- is

• S^2-

• H₂S

• Both (a) and (b)

• None of these

The molar concentration of chloride ions in the resulting solution of 300 mL of 3.0 M NaCl and 200 mL of 4.0 M BaCl₂ will be

• 1.7 M

• 1.8 M

• 5.0 M

• 3.5 M

4.

Which of the following has least bond energy?

• N${}_2^{2-}$

• N${}_2^{-}$

• N${}_2^{+}$

• N₂

Which of the following species has highest bond energy?

• O${}_2^{2-}$

• O${}_2^{+}$

• O${}_2^{-}$

• O₂

Which of the following is a weak acid?

• C₆H₆

• CH₃COOH

• CH₂=CH₂

• CH₃COCH₃

LPG mainly consist of the following

• methane

• hydrogen

• acetylene

• butane

Which of the following is least hydrolysed?

• BeCl₂

• MgCl₂

• CaCl₂

• BaCl₂

The laughing gas is

• N₂O₄

• NO

• N₂O

• N₂O₅

The hydrogen ion concentration of a solution is 3.98 × 10^-6 mole per liter. The pH value of this solution will be

• 6.0

• 5.8

• 5.4

• 5.9