Rainbow is not caused due to: (A) Reflection of light (B) Refraction of light (C) Dispersion (D) Scattering
Answer
Answer: D Rainbow is caused by reflection,refractionanddispersionof light in water droplets resulting in a spectrum of light appearing in the sky.It is not caused due to scattering.
When \(CO_2\) is bubbled through a solution of barium peroxide in water: (A) carbonic acid is formed (B) \(H_2O_2\) is formed (C) \(H_2O\) is formed (D) barium hydroxide is formed
The four quantum numbers of the valence electronof potassium are: (A) \(4,0,1,+\frac{1}{2}\) (B) \(4,1,0,+\frac{1}{2}\) (C) \(4,0,0,+\frac{1}{2}\) (D) \(4,1,1,+\frac{1}{2}\)
The precipitate of \(CaF_{2}(K_{sp} =1.7\times 10^{-10})\) is obtained when equal volumes of the following are mixed (A) \(10^{-4}M Ca^{2+}+10^{-4}M F^{-}\) (B) \(10^{-2}M Ca^{2+}+10^{-3}M F^{-}\) (C) Both A and B (D) None of these