Which of the following alloys is used in the construction of the outer fuselage of ultra-high-speed aircraft?

  • A
    Nichrome
  • B
    Cupra-nickel
  • C
    Stainless steel
  • D
    Bronze

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Write a note on halide compounds of transition elements.

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The yellow colour solution of $Na_2CrO_4$ changes to orange-red on passing $CO_2$ gas due to the formation of $:-$

Assertion : Solution of $Na_2CrO_4$ in water is intensely coloured.
Reason : Oxidation state of $Cr$ in $Na_2CrO_4$ is $+VI$.

Ferric sulphate on heating gives:

Match the following:
List-$I$List-$II$
$A$. $Co^{2+}$$I$. Yellow colour
$B$. $Fe^{2+}$$II$. Dark green colour
$C$. $Ni^{2+}$$III$. Blue colour
$D$. $Cu^{2+}$$IV$. Pale green colour
$V$. Pink colour

The correct answer is

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