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प्रश्न
Name two metals which cannot displace hydrogen from dilute acids.
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उत्तर
Copper and silver are two metals which cannot displace hydrogen from dilute acids.
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संबंधित प्रश्न
Why is sodium kept immersed in kerosene oil?
What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.
Why are metals called electropositive elements whereas non-metals are called electronegative elements?
From amongst the metals sodium, calcium aluminium, copper and magnesium, name the metal:
(i) which reacts with water only on boiling, and
(ii) another which does not react even with steam.
Name the metal which has been placed at the bottom of the reactivity series.
Write equation for the reaction of sodium with oxygen.
How would you show that silver is chemically less reactive than copper?
Complete and balance the following equation:
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved.
The elements whose oxides can turn litmus solution red are:
(a) lithium and sodium
(b) copper and potassium
(c) carbon and hydrogen
(d) phosphorus and sulphur
A metal less reactive and another metal more reactive than hydrogen are:
(a) aluminium and lead
(b) iron and magnesium
(c) copper and tin
(d) copper and mercury
Name a metal which It does not react with any physical state of water?
When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?
Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.
Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
