Advertisements
Advertisements
प्रश्न
State whether the following statement is true or false:
Non-metals react with dilute acids to produce a gas which burns with a 'pop' sound.
Advertisements
उत्तर
False. Metals react with dilute acids to produce hydrogen gas that burns with a 'pop' sound.
APPEARS IN
संबंधित प्रश्न
Name the following:
Metals which forms an amphoteric oxide.
‘E’ is an element which reacts with oxygen to form an oxide E2O. An aqueous solution of E2O turns red litmus blue, so:
i. What is the nature of oxide E2O ?
ii. Write the name of element ‘E’.
Write the chemical reaction when iron reacts with dilute H2SO4.
What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.
Explain the following reaction with the help of a balanced chemical equation:
Magnesium reacts with hot water.
Why are metals called electropositive elements whereas non-metals are called electronegative elements?
Complete and balance the following equation:
What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Name two metals (other than zinc and iron) which can displace hydrogen from dilute hydrochloric acid?
What is the action of water on sodium ? Write equation of the chemical reaction involved.
Write one reaction in which aluminium oxide behaves as a basic oxide and another in which it behaves as an acidic oxide.
Name another metal oxide which behaves like aluminium oxide.
Name one metal more reactive and another less reactive than hydrogen.
Name one metal which displaces copper from copper sulphate solution and one which does not.
An acidic oxide is produced by the element:
(a) Na
(b) C
(c) Ca
(d) H
An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be:
(a) S
(b) Ca
(c) C
(d) Ag
Answer the following question:
An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is metal or a non - metal. Explain with a proper example.
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Arrange the following metals in the increasing order of their reactivities:
Copper, Zinc, Aluminium, and Iron
