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प्रश्न
Give a chemical test to distinguish between the following gases:
Hydrogen chloride and hydrogen sulphide
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उत्तर
Hydrogen chloride [HCl]: Turns silver nitrate sol. into curdy white ppt. This ppt. is soluble in NH4OH but insoluble in dil. HN03 does not show lead acetate paper test.
Hydrogen sulphide [H2S]: Shows no such test, with AgNO3[sol.] Put moist lead acetate paper in H2S gas. It turns silvery black.
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संबंधित प्रश्न
Hydrogen can be prepared with the metal zinc by using:
acid
Give an equation.
A small piece of calcium metal is put into a small trough containing water. There is effervescence and white turbidity is formed.
Write an equation for the reaction.
Hydrogen is obtained by displacement from:
- dilute sulphuric acid
- dilute hydrochloric acid
Write equations using zinc and iron.
Why does copper not show similar behavior?
Name two alkalies that can displace hydrogen. Give balanced equations for the same. Why are the metals you have used considered to have a unique nature?
Select the odd one out and justify your answer.
Zn, Fe, Mg, and Na
Select the odd one out and justify your answer.
Fe, Pb, Al and Zn
Choose terms from the options given in brackets to complete this sentence.
Sodium ………………. reacts smoothly with cold water.
(metal, amalgam, in the molten state)
What do you observe when dilute sulphuric acid is added to Zinc granules.
Using dilute sulphuric acid how would you differentiate between:
Sodium sulphide and sodium carbonate.
How would you identify the gaseous products evolved.
Name the following.
A metal below iron but above copper in the activity series of metals which has no reaction with water.
