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
This statement is false.
Explanation:
Non-metals do not react with dilute acids because they are electron acceptors and cannot donate electrons to reduce hydrogen ions (H+) into hydrogen gas. Instead, active metals react with dilute acids to displace hydrogen. It is this displaced hydrogen gas that burns with a characteristic ‘pop’ sound.
APPEARS IN
संबंधित प्रश्न
Write equations for the reactions of iron with steam.
Show the formation of Na2O by the transfer of electrons.
Differentiate between metals and non-metals on the basis of their chemical properties.
What name is given to those metal oxides which show basic as well as acidic behaviour?
How would you show that silver is chemically less reactive than copper?
Calcium is a ______ reactive metal than sodium.
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
How do metals react with hydrogen? Explain with an example.
What is the action of water on sodium? Write the equation of the chemical reaction involved.
What happens when calcium reacts with water? Write the chemical equation of the reaction of calcium with water.
Name one metal which displaces silver from a silver nitrate solution.
One of the following is not a neutral oxide. This is:
Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
An element E forms an oxide E2O. An aqueous solution of E2O turns red litmus paper blue.
- What is the nature of the oxide E2O?
- State whether element E is a metal or a non-metal.
- Give one example of an element like E.
An element X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but oxide XO2 turns litmus solution red.
- What is the nature of oxide XO?
- What is the nature of oxide ХО2?
- Would you call element X a metal or a non-metal? Give reason for your choice.
- Can you give an example of element like X?
Choose the correct alternative and rewrite the following:
Reaction of iron nails whith copper sulphate solution is an example of _____________________
Choose the correct alternative and rewrite the following:
Which of the following is lue in colour?
A cable manufacturing unit tested few elements on the basisof their physical properties.
| Properties | W | X | Y | Z |
| Malleable | Yes | No | No | Yes |
| Ductile | Yes | No | No | Yes |
| Electrical conductivity | Yes | Yes | Yes | No |
| Melting Point | High | Low | Low | High |
Which of the above elements were dicarded for usage by the company?
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
