Question

Q 5.Name the following:
(a) A metal, which is preserved in kerosene.
(b) A lustrous coloured non-metal
(c) A metal, which can melt while kept on palm.
(d) A metal, which is a poor conductor of heat. it's also urgent pls answer this question​

Answer 1

Answer:

(a) Sodium

(b) Iodine & Diamond

(c) Element gellium

(d) Lead

Explanation:

I hope my answer is helpful

Answer 2

1.Metal which are preserved in kerosene -

Answer - Sodium, Lithium And Potassium.

Explaination : They are very reactive metals in order to prevent them to react with oxygen it is kept immersed in kerosene oil. The reaction of these metals with air is so vigorous that they catch fire automatically.

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2. Lustrous coloured non-metal -

Answer - IODINE and DIAMOND.

Explaination : They have a slight metallic lustre. The presence of lustre in diamond is not due to free electron but due to its high refractive index.

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3. Metal which can melt while kept on palm are -

Answer- Gallium & Caesium.

Explaination - They exhibit very low melting point. The melting point of gallium is 29.8°C and the melting point of caesium is 28.5°C. 4. Metal which are poor conductor of

Heat are - MERCURY & LEAD. Mercury is the poorest conductor of heat.

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4 . A metal, which is a poor conductor of heat. it's also urgent pls answer this question

Answer - Lead

Explaination -

Materials that are poor conductors of heat are called insulators. The materials which cannot transfer heat are poor conductors. Conduction is the transfer of thermal energy between particles of matter that are touching. A good conductor will have free-moving electrons whereas bad conductors of electricity will lack these free-moving electrons.

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