Write true or false for the following statement:
The thermal decomposition reaction of calcium sulphate (gypsum) is used in black and white photography.
The thermal decomposition reaction of calcium sulphate (gypsum) is used in black and white photography.
(FALSE) The statement is False.
In black and white photography,the decomposition reaction of silver chloride $(AgCl)$ or silver bromide $(AgBr)$ is used,not calcium sulphate.
The reaction is: $2AgCl(s) \xrightarrow{sunlight} 2Ag(s) + Cl_2(g)$.
In black and white photography,the decomposition reaction of silver chloride $(AgCl)$ or silver bromide $(AgBr)$ is used,not calcium sulphate.
The reaction is: $2AgCl(s) \xrightarrow{sunlight} 2Ag(s) + Cl_2(g)$.
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Similar Questions
Balance the following chemical equations:
$(a)$ $KClO_{3} \longrightarrow KCl + O_{2}$
$(b)$ $Na_{2}CO_{3} + HCl \longrightarrow NaCl + H_{2}O + CO_{2}$
$(a)$ $KClO_{3} \longrightarrow KCl + O_{2}$
$(b)$ $Na_{2}CO_{3} + HCl \longrightarrow NaCl + H_{2}O + CO_{2}$
Easy
View SolutionState whether the following statement is true or false:
Calcium oxide is also called lime or quicklime.
Calcium oxide is also called lime or quicklime.
Easy
View SolutionBalance the following chemical equations and identify the type of chemical reaction.
$(a)$ $Mg(s) + Cl_2(g) \to MgCl_2(s)$
$(b)$ $HgO(s) \xrightarrow{\text{Heat}} Hg(l) + O_2(g)$
$(c)$ $Na(s) + S(s) \xrightarrow{\text{Fuse}} Na_2S(s)$
$(a)$ $Mg(s) + Cl_2(g) \to MgCl_2(s)$
$(b)$ $HgO(s) \xrightarrow{\text{Heat}} Hg(l) + O_2(g)$
$(c)$ $Na(s) + S(s) \xrightarrow{\text{Fuse}} Na_2S(s)$
Medium
View SolutionWhich of the following are exothermic processes?
$(i)$ Reaction of water with quick lime
$(ii)$ Dilution of an acid
$(iii)$ Evaporation of water
$(iv)$ Sublimation of camphor (crystals)
$(i)$ Reaction of water with quick lime
$(ii)$ Dilution of an acid
$(iii)$ Evaporation of water
$(iv)$ Sublimation of camphor (crystals)
Medium
View SolutionState the kind of chemical reactions in the following examples:
$(a)$ Digestion of food in the stomach
$(b)$ Combustion of coal in air.
$(a)$ Digestion of food in the stomach
$(b)$ Combustion of coal in air.
Easy
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