CBSE Class 10 Science 2020 · Paper 31/2/1 · Question 10

Chemical Reactions and Equations 1 mark Easy

Identify ‘

x

’, ‘

y

’ and ‘

z

’ in the following reaction :

2 KClO_{3} (x) (y) 2 KCl (x) + O_{2} (z)

(a) $x$ = gas ; $y$ = reaction condition, $z$ = gas
(b) $x$ = solid ; $y$ = liquid; $z$ = gas
(c) $x$ = number of moles of $KClO_{3}$ ; $y$ = reaction condition; $z$ = no. of molecules of oxygen.
(d) $x$ = physical state of $KClO_{3}$ and $KCl$ ; $y$ = reaction condition; $z$ = physical state of $O_{2}$ .

Answer

(d)

x

= physical state of

KClO_{3}

and

KCl

;

y

= reaction condition;

z

= physical state of

O_{2}

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