Match List I with List II
List I (Atomic number) |
List II (Block of periodic table) |
||
---|---|---|---|
A. | 37 | I. | p-block |
B. | 78 | II. | d-block |
C. | 52 | III. | f-block |
D. | 65 | IV. | s-block |
Choose the correct answer from the options given below :
Match List I with List II
List I (molecules/ions) |
List II (No. of lone pairs of e$$^-$$ on central atom) |
||
---|---|---|---|
A. | $$\mathrm{IF_7}$$ | I. | Three |
B. | $$\mathrm{ICl}$$$$_4^ - $$ | II. | One |
C. | $$\mathrm{XeF_6}$$ | III. | Two |
D. | $$\mathrm{XeF_2}$$ | IV. | Zero |
Choose the correct answer from the options given below :
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)
$$[\log 5=0.698, \log 7=0.845, \log 2=0.301]$$