Hydrogen gas is liberated when an acid reacts with a metal. For example, when zinc metal reacts with dil. hydrogen is evolved and salt zinc chloride is formed as: It can be tested by bringing a burning candle near the gas.
Hydrogen gas is liberated when an acid reacts with a metal. For example, when zinc metal reacts with dil. hydrogen is evolved and salt zinc chloride is formed as: It can be tested by bringing a burning candle near the gas.
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.
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.
Magnesium is very reactive element which rapidly reacts with oxygen in the air to form a white layer of magnesium oxide and this layer will not burn. Hence, to remove the Magnesium oxide layer from the ribbon which may prevent or slow down the burning of magnesium ribbon, it is necessary to remove tRead more
Magnesium is very reactive element which rapidly reacts with oxygen in the air to form a white layer of magnesium oxide and this layer will not burn. Hence, to remove the Magnesium oxide layer from the ribbon which may prevent or slow down the burning of magnesium ribbon, it is necessary to remove this layer.
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?
Hydrogen gas is liberated when an acid reacts with a metal. For example, when zinc metal reacts with dil. hydrogen is evolved and salt zinc chloride is formed as: It can be tested by bringing a burning candle near the gas.
Hydrogen gas is liberated when an acid reacts with a metal. For example, when zinc metal reacts with dil. hydrogen is evolved and salt zinc chloride is formed as: It can be tested by bringing a burning candle near the gas.
See lessWhy 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.
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.
See lessWhy Should a magnesium ribbon be cleaned before burning in air?
Magnesium is very reactive element which rapidly reacts with oxygen in the air to form a white layer of magnesium oxide and this layer will not burn. Hence, to remove the Magnesium oxide layer from the ribbon which may prevent or slow down the burning of magnesium ribbon, it is necessary to remove tRead more
Magnesium is very reactive element which rapidly reacts with oxygen in the air to form a white layer of magnesium oxide and this layer will not burn. Hence, to remove the Magnesium oxide layer from the ribbon which may prevent or slow down the burning of magnesium ribbon, it is necessary to remove this layer.
See less