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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Name the Following: the Most Reactive Halogen. - Chemistry

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प्रश्न

Name the following:

The most reactive halogen.

एक शब्द/वाक्यांश उत्तर
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उत्तर

Fluorine

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अध्याय 6: Metals and Non-metals - Objective Type Questions

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विराफ जे दलाल New Simplified Middle School Chemistry [English] Class 7
अध्याय 6 Metals and Non-metals
Objective Type Questions | Q 3.1

संबंधित प्रश्न

Give a reason for Alkali metals are good reducing agents.


The atomic number of an element Y is 16.
(a) What must an atom of Y do to achieve the nearest inert gas electron arrangement?
(b) Which inert gas is nearest to Y?


Which property of 'solder' alloy makes it suitable for welding electrical wires?


Explain how, a reduction reaction of aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved.


Statements given below are incorrect. Write the correct statements : 

Bronze is a mixture of 10% copper, 80% zinc and 10% tin.  


Tick (√) the most appropriate answer. 

Graphite is used :


Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:

Oxygen


Write scientific reason.

Generally the ionic compounds have high melting points.


When a copper coin is dipped in silver nitrate solution, a glitter appears on the coin after some time. Why does this happen? Write the chemical equation.


With reference to the following metals state their use in daily life metal:

Zinc


Give a reason why a green deposit is seen on the surface of an article of copper


Name the following:

The chemical compound responsible for the green deposit on the surface of articles of copper.


Complete the following flow chart.


Assertion: Mercury is solid in room temperature.

Reason: Mercury is a non-metal.


Metals are usually solids or gases at room temperature.


The liquid metal at room temperature ______.


The metal can be cut with a knife ______.


Metals and non–metals are used for making ______, ______ and ______.


Silver and copper are very good conductors of electricity.


X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:

Metal atoms tend to have a maximum of ______ electrons in the outermost shell.


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