The alkaline earth metal sulphate(s) which are readily soluble in water is/are :
A. $$\mathrm{BeSO}_{4}$$
B. $$\mathrm{MgSO}_{4}$$
C. $$\mathrm{CaSO}_{4}$$
D. $$\mathrm{SrSO}_{4}$$
E. $$\mathrm{BaSO}_{4}$$
Choose the correct answer from the options given below :
A $$300 \mathrm{~mL}$$ bottle of soft drink has $$0.2 ~\mathrm{M}~ \mathrm{CO}_{2}$$ dissolved in it. Assuming $$\mathrm{CO}_{2}$$ behaves as an ideal gas, the volume of the dissolved $$\mathrm{CO}_{2}$$ at $$\mathrm{STP}$$ is ____________ $$\mathrm{mL}$$. (Nearest integer)
Given : At STP, molar volume of an ideal gas is $$22.7 \mathrm{~L} \mathrm{~mol}^{-1}$$
Some amount of dichloromethane $$\left(\mathrm{CH}_{2} \mathrm{Cl}_{2}\right)$$ is added to $$671.141 \mathrm{~mL}$$ of chloroform $$\left(\mathrm{CHCl}_{3}\right)$$ to prepare $$2.6 \times 10^{-3} \mathrm{M}$$ solution of $$\mathrm{CH}_{2} \mathrm{Cl}_{2}(\mathrm{DCM})$$. The concentration of $$\mathrm{DCM}$$ is ___________ ppm (by mass).
Given :
atomic mass : C = 12
H = 1
Cl = 35.5
density of $$\mathrm{CHCl}_{3}=1.49 \mathrm{~g} \mathrm{~cm}^{-3}$$
If compound A reacts with B following first order kinetics with rate constant $$2.011 \times 10^{-3} \mathrm{~s}^{-1}$$. The time taken by $$\mathrm{A}$$ (in seconds) to reduce from $$7 \mathrm{~g}$$ to $$2 \mathrm{~g}$$ will be ___________. (Nearest Integer)
$$[\log 5=0.698, \log 7=0.845, \log 2=0.301]$$