Why should curd and sour substances not be kept in brass and copper vessels ?
Why should curd and sour substances not be kept in brass and copper vessels ?
Curd and other sour substances contain acids. Therefore, when they are kept in brass and copper vessels, the metal reacts with the acid to liberate hydrogen gas and harmful products, thereby spoiling the food.
Similar Questions
Five solutions $A,\,B,\,C,\,D$ and $E$ when tested with universal indicator showed $pH$ as $4,\,1,\,11,\,7$ and $9$, respectively. Which solution is
$(a)$ neutral ?
$(b)$ strongly alkaline ?
$(c)$ strongly acidic ?
$(d)$ weakly acidic ?
$(e)$ weakly alkaline ?
Arrange the $pH$ in increasing order of hydrogen-ion concentration.
Five solutions $A,\,B,\,C,\,D$ and $E$ when tested with universal indicator showed $pH$ as $4,\,1,\,11,\,7$ and $9$, respectively. Which solution is
$(a)$ neutral ?
$(b)$ strongly alkaline ?
$(c)$ strongly acidic ?
$(d)$ weakly acidic ?
$(e)$ weakly alkaline ?
Arrange the $pH$ in increasing order of hydrogen-ion concentration.
Compounds such as alcohols and glucose also contain hydrogen but are not categorised as acids. Describe an Activity to prove it.
Compounds such as alcohols and glucose also contain hydrogen but are not categorised as acids. Describe an Activity to prove it.
Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas ?
Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas ?
Fresh milk has a $pH$ of $6$. How do you think the $pH$ will change as it turns into curd ? Explain your answer.
Fresh milk has a $pH$ of $6$. How do you think the $pH$ will change as it turns into curd ? Explain your answer.
Write word equations and then balanced equations for the reaction taking place when -
$(a)$ dilute sulphuric acid reacts with zinc granules.
$(b)$ dilute hydrochloric acid reacts with magnesium ribbon.
Write word equations and then balanced equations for the reaction taking place when -
$(a)$ dilute sulphuric acid reacts with zinc granules.
$(b)$ dilute hydrochloric acid reacts with magnesium ribbon.