Which of the following has sp²-hybridisation?

• C₂H₆

• C₂H₄

• BeCl₂

• C₂H₂

An sp³-hybrid orbital contains

• $\frac{1}{4} \mathrm{s}- \mathrm{character}$

• $\frac{1}{2} \mathrm{s}- \mathrm{character}$

• $\frac{2}{3} \mathrm{s}-\mathrm{character}$

• $\frac{3}{4} \mathrm{s}-\mathrm{character}$

Hybridisation states of C in CH${}_3^{+}$ and C${\mathrm{H}}_3^{-}$ are

• sp², sp³

• sp³, sp²

• sp, sp²

• sp², sp

Which one of the following complexes is outer orbital complex?

• [Co(NH₃)₆]³⁺

• [Mn(CN)₆]⁴⁺

• [Fe(CN)₆]^4-

• [Ni(NH₃)₆]²⁺

The correct statement with regard to ${\mathrm{H}}_2^{+}$ and ${\mathrm{H}}_2^{-}$ is

• both H${}_2^{+}$ and H${}_2^{-}$ are equally stable

• both H${}_2^{+}$ and H${}_2^{-}$ do not exist

• H${}_2^{-}$ is more stable than H${}_2^{+}$

• H${}_2^{+}$ is more stable than H${}_2^{-}$

The number of electrons, neutrons and protons in a species are equal to 10, 8 and 8 respectively. The proper symbol of the species is

• ${}_8{}^{16}\mathrm{O}$

• ${}_8{}^{18}\mathrm{O}$

• ${}_{10}{}^{18}\mathrm{Ne}$

• ${}_8{}^{16}\mathrm{O}^{2-}$

717.

The expression for the solubility product of Ag₂CO₃ will be

• K_sp = s²

• K_sp = 4s³

• K_sp = 27s⁴

• K_sp = s

The correct order towards bond angle is

• sp³ < sp² < sp

• sp < sp² < sp³

• sp < sp³ < sp²

• sp² < sp³ < sp

Which of the following has a bond formed by overlap of sp-sp³ hybrid orbitals?

• CH₃ - C $\equiv$ C - H

• CH₃ - CH = CH - CH₃

• CH₂ = CH - CH = CH₂

• HC $\equiv$CH

Which of the following has the highest bond order?

• N₂

• O₂

• He₂

• H₂