Advertisements
Advertisements
प्रश्न
Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
(a) an acidic oxide
(b) a basic oxide
(c) an amphoteric oxide
(d) a neutral oxide
उत्तर
(c) an amphoteric oxide
Zinc oxide can react with both acids and bases to form salt and water.
APPEARS IN
संबंधित प्रश्न
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
Write the electron-dot structures for sodium, oxygen and magnesium.
Why are metals called electropositive elements whereas non-metals are called electronegative elements?
Complete and balance the following equation:
Na2O + H2O →
Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?
What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.
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.
(a) What is the nature of oxide XO?
(b) What is the nature of oxide XO2?
(c) Would you call element X a metal or a non-metal? Give reason for your choice.
(d) Can you give an example of element like X?
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
