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प्रश्न
Write the chemical equation for the following reaction:
Calcium metal reacts with water.
उत्तर
\[\ce{\underset{\text{Calcium}}{Ca}+\underset{\text{Water}}{2H2O}->\underset{\text{Calcium hydroxide}}{Ca(OH)2}+\underset{\text{Hydrogen gas}}{H2}}\]
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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’.
Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
Why does aluminium not react with water under ordinary conditions?
An element E forms an oxide E2O. An aqueous solution of E2O turns red litmus paper blue.
(a) What is the nature of the oxide E2O?
(b) State whether element E is a metal or a non-metal.
(c) 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.
(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?
In a solution of lead acetate, a strip of metal M was dipped. After some time, lead from the solution was deposited on the metal strip. Which metal is more reactive, M or lead?
Which of the following property is not responsible for copper to be used as electrical conduction wires?
Find the odd one out:
