What is new temperature of a gas when its initial volume $$3 \mathrm{~dm}^3$$ at $$300 \mathrm{~K}$$ is doubled at constant pressure?

Which among the following phenols does NOT correctly match with their IUPAC names?

Which among following statements is NOT true according to principles of green chemistry?

What is the value of effective atomic number of cobalt in $$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$$ complex if $$\mathrm{Co}(\mathrm{Z}=27)$$ ?