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Name the alloy which is made up of Copper, Zinc and Tin.
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| Abhishek was given a salt ‘X’ which was white in colour for analysis. On strong heating, it produced a yellow residue, a colourless gas and also a reddish-brown gas. The solution of the salt ‘X’, when tested with an excess of ammonium hydroxide, produced a chalky white insoluble precipitate. |
- Name the coloured gas that evolved when Abhishek heated the salt strongly.
- Which cation was present in the sample given to Abhishek?
- Identify the salt given to Abhishek for analysis.
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X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
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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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X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the reducing agent.
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State the group and period, of the element having three shells with three electrons in valence shell.
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Study the flow chart and give balanced equations with conditions for the conversions A, B, C, D and E.

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Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
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Name the metalloids in the first twenty elements.
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Name the non-metals in the first twenty elements.
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What is the general name of the last elements of the Periodic Table?
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Name the following metal:
A metal present in period 3, group 1 of the periodic table.
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An element has 2 electrons in its N shell.
State its position in periodic table.
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An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
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Answer the following in respect of element \[\ce{_16^32S}\].
Give its electronic configuration.
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Answer the following in respect of element \[\ce{_16^32S}\].
To which group and period does it belong?
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Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
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Study the flow chart and give balanced equations with conditions for the conversions A, B, C, D and E.

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Match the atomic number with the following:
A rare gas.
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Match the atomic number with the following:
An element of group 2.
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