Questions in chemical-aritmatic

Select	Question
	One fermi is
	A picometre is written as
	One atmosphere is equal to
	Dimensions of pressure are same as that of
	The prefix ${10^{18}}$ is
	Given the numbers: 161cm, 0.161cm, 0.0161 cm. The number of significant figures for the three numbers are
	Significant figures in 0.00051 are
	Which of the following halogen can be purified bysublimation
	Difference in density is the basis of
	Which of the following elements of matter would best convey that there is life on earth

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