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प्रश्न
Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.
उत्तर
Nitric acid is highly corrosive in nature and corrodes cork, rubber, etc.
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संबंधित प्रश्न
Explain the following:
Concentrated nitric add appears yellow when it is left standing in a glass bottle.
Explain the following:
An all-glass apparatus is used in the laboratory preparation of nitric acid.
Name the following :
Gas produced in air during lighting.
Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of HNO3, State the reason.
What happens when (Given balanced equation) :
Sulphar is added to hot and conc. HNO3?
Give two chemical tests to distinguish between dilute nitric acid and hydrochloric acid.
Fill in the blank with appropriate word/words.
Aqua regia is a mixture of _______ and________
Name the compounds required for the laboratory preparation of nitric acid.
Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid.
X, Y, and Z are three crystalline solids that are soluble in water and have common anion.
To help you to identify X, Y and Z, you are provided with the following experimental observations. Copy and complete the corresponding inferences in (a) to (e).
- A reddish-brown gas is obtained when X, Y, and Z are separately warmed with concentrated sulphuric acid and copper turning added to the mixture.
INFERENCE 1: The common anion is the ______ ion. - When X is heated, it melts and gives off only one gas which re-lights a glowing splint.
INFERENCE 2: The cation in X is either ______ or ______. - The action of heat on Y produces a reddish-brown gas and yellow residue which fuses with a glass of the test tube.
INFERENCE 3: The metal ion present in Y is the ______ ion. - When Z is heated, it leaves no residue. Warming Z with sodium hydroxide solution liberates a gas which turns moist red litmus paper blue.
INFERENCE 4: Z contains the ______ cation. - Write the equations for the following reactions:
- X and concentrated sulphuric acid (below 200°C). (One equation only for either of the cations given in INFERENCE 2)
- The action of heat on Y.
- Concentrated nitric acid is added to copper turnings kept in a beaker.
