Name the method used for preparation of the following salts from the list given below:

Sodium hydroxide solution is added to the solutions containing the ions mentioned in list X. List Y gives the details of the precipitate. Match the ions with their coloured precipitates.

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Across a period, the ionisation potential …………….(increases, decreases, remains same)

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Down the group, electron affinity…………….(increases, decreases, remains same).

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In covalent compounds, the bond is formed due to the ………(sharing/transfer) of electrons.

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Electrovalent compound have a ………..(low/high )boiling point.

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A molecule of ………… contains a triple bond (hydrogen, ammonia, nitrogen).

Choose the correct word/phrase from within the bracket to complete the following sentences:

The catalyst used for conversion of ethene to ethane is commonly……. (nickel /iron/cobalt)

choose the correct word/phrase from within the bracket to complete the following sentences:.

When acetaldehyde is oxidized with acidified potassium dichromate, it forms ………(ester/ethanol/acetic acid)

choose the correct word/phrase from within the bracket to complete the following sentences:

Ethanoic acid reacts with ethanol in presence of concentrated H₂SO₄, so as to form a compound and water. The chemical reaction which takes place is called………….(dehydration/hydrogenation/esterification)