Invar, an alloy of $ Fe$ and $ Ni $ is used in watches and meter scale, its characteristic property is
Invar, an alloy of $ Fe$ and $ Ni $ is used in watches and meter scale, its characteristic property is
- A
Small coefficient of expansion
- B
Resistance to corrosion
- C
Hardness and elasticity
- D
Magnetic nature
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In a titration experiment, $10 \,mL$ of an $FeCl _{2}$ solution consumed $25\, mL$ of a standard $K _{2} Cr _{2} O _{7}$ solution to reach the equivalent point. The standard $K _{2} Cr _{2} O _{7}$ solution is prepared by dissolving $1.225\, g$ of $K _{2} Cr _{2} O _{7}$ in $250 \,mL$ water. The concentration of the $FeCl _{2}$ solution is closest to $.....\, N$
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- [KVPY 2019]