MCQ
Significant figures in $0.00051$ are
  • A
    $5$
  • B
    $3$
  • $2$
  • D
    $4$

Answer

Correct option: C.
$2$
c
In the given number $0.00051$, the zeros to the left of the non-zero digit are not considered as significant figures.

Thus, the given number has only $2$ significant figures.

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Similar questions

When a metal rod ${M}$ is dipped into an aqueous colourless concentrated solution of compound ${N}$, the solution turns light blue. Addition of aqueous $\mathrm{NaCl}$ to the blue solution gives a white precipitate ${O}$. Addition of aqueous $\mathrm{NH}_3$ dissolves ${O}$ and gives an intense blue solution.

$1.$ The metal rod ${M}$ is

$(A)$ $\mathrm{Fe}$ $(B)$ $\mathrm{Cu}$ $(C)$ $\mathrm{Ni}$ $(D)$ $\mathrm{Co}$

$2.$ The compound ${N}$ is

$(A)$ $\mathrm{AgNO}_3$ $(B)$ $\mathrm{Zn}\left(\mathrm{NO}_3\right)_2$

$(C)$ $\mathrm{Al}\left(\mathrm{NO}_3\right)_3$ $(D)$ $\mathrm{Pb}\left(\mathrm{NO}_3\right)_2$

$3.$ The final solution contains

$(A)$ $\left[\mathrm{Pb}\left(\mathrm{NH}_3\right)_4\right]^{2+}$ and $\left[\mathrm{CoCl}_4\right]^{2-}$

$(B)$ $\left[\mathrm{Al}\left(\mathrm{NH}_3\right)_4\right]^{3+}$ and $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$

$(C)$ $\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+}$and $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$

$(D)$ $\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+}$and $\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$

Give the answer question $1,2$ and $3.$

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