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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Name the Following: a Halogen Which is a Solid at Room Temperature.

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प्रश्न

Name the following:

A halogen which is a solid at room temperature.

एक शब्द/वाक्यांश उत्तर
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उत्तर

Iodine

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

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विराफ जे दलाल Simplified Middle School Chemistry [English] Class 7 ICSE
अध्याय 6 Metals and Non-metals
Objective Type Questions | Q 3.5

संबंधित प्रश्न

Give reasons for the following.

Sodium and potassium are stored in kerosene.


Give a reason for Alkali metals are good reducing agents.


The atomic number of an element Y is 16.

  1. What must an atom of Y do to achieve the nearest inert gas electron arrangement?
  2. Which inert gas is nearest to Y?

How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?


Statements given below are incorrect. Write the correct statements : 

Zinc is used for making power transmission wires.  


State two important uses of following metal: 

Uses of gold  


Write name.

The device used for grinding an ore.


Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. Write name of any element present in the same group as X


The minerals from which the metal can be separated economically are called _______.


The metal which is liquid at room temperature is ______.


Higher Order Thinking Skills.

Aakash noticed that the metal latch on gate was difficult to open during hot sunny days. However, it was not difficult to open the same latch at night. Aakash observed that the latch and the gate are exposed to the sun during day time.

  1. Formulate a hypothesis based on the information provided.
  2. Briefly state how you would test the hypothesis.

Give reasons for the following.

  1. Aluminum foils are used to wrap food items.
  2. Immersion rods for heating liquids are made up of metallic substances.
  3. Sodium and potassium are stored in kerosene.
  4. Mercury is used in thermometers.

A is a reddish-brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.


The most abundant metal in the earth’s crust is ____________.


______ is the first scientist who used the term element.


In the following figure, you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.

  1. ______  is a metal.
  2. Metals are good ______ of electricity. 

The liquid metal at room temperature ______.


Silver and copper are very good conductors of electricity.


The metals which are found in both free state as well as combined state are ______.


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