Which of the following pairs of substances would give same gaseous product on reaction with water?

Question

Which of the following pairs of substances would give same gaseous product on reaction with water? (A) Na and Na2O2  (B)  Ca and CaH2  (C) Ca and CaO (D) Ba and BaO2

Tardigrade Admin · Accepted Answer

The given substances react with water in the following manner

N a + H_{2} O N a O H + H_{2} (g)

2 N a_{2} O_{2} + 2 H_{2} O 4 N a O H + O_{2} (g) + H_{2} (g)

C a + H_{2} O C a O + H_{2}

C a H_{2} + 2 H_{2} O C a (O H)_{2} + 2 H_{2}

C a O + H_{2} O C a (O H)_{2}

C a C_{2} + 2 H_{2} O C a (O H)_{2} + C_{2} H_{2}

B a + 2 H_{2} O B a (O H)_{2} + H_{2}

B a O_{2} + H_{2} O B a^{2 +} + O_{2} + H_{2} O_{2}

Hence,

C a

and

C a H_{2}

is the pair that gives same gaseous product on reaction with water.

Q. Which of the following pairs of substances would give same gaseous product on reaction with water?

$N a$ and $N a_{2} O_{2}$

$C a$ and $C a H_{2}$

$C a$ and $C a O$

$B a$ and $B a O_{2}$

$C a$ and $C a C_{2}$

Q. Which of the following pairs of substances would give same gaseous product on reaction with water?

Na and Na2​O2​

Ca and CaH2​

Ca and CaO

Ba and BaO2​

Ca and CaC2​

$N a$ and $N a_{2} O_{2}$

$C a$ and $C a H_{2}$

$C a$ and $C a O$

$B a$ and $B a O_{2}$

$C a$ and $C a C_{2}$