1) what favourable qualities given to gold when it is alloyed with copper or silver for making ornaments.
2)name the following. a) a lustrous liquid metal.? b) element which melts kept on palm

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Solution

Lustrous liquid metal - Mercury.
Element that melts when kept on palm - Cesium and Gallium.

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Q. Question 22
What are the favourable qualities given to gold when it is alloyed with copper or silver for the purpose of making ornaments?

Assertion:- An alloy of gold with copper or silver is used to make ornaments.

Reason:- Pure gold is soft due to which it cannot be not used to make ornaments.

Q. How many parts of pure gold are usually alloyed with 2 parts of either copper or silver for making ornaments in India?

Name the following : [3 MARKS]

(a) A lustrous liquid metal.
(b) A liquid non-metal
(c) A metal which can be cut with a knife
(d) A non-metal which is good conductor of electricity.
(e) An element which melts when kept on the palm.
(f) Good conductor of heat.

Q. Gold is alloyed with which metal to make it harder?

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1) what favourable qualities given to gold when it is alloyed with copper or silver for making ornaments. 2)name the following. a) a lustrous liquid metal.? b) element which melts kept on palm

Lustrous liquid metal - Mercury.Element that melts when kept on palm - Cesium and Gallium.

1) what favourable qualities given to gold when it is alloyed with copper or silver for making ornaments.
2)name the following. a) a lustrous liquid metal.? b) element which melts kept on palm

Lustrous liquid metal - Mercury.
Element that melts when kept on palm - Cesium and Gallium.