Electrolysis — Chemistry STD 10 — Question

HCl has the _______ of 36.5.

The word acid comes from latin acidus meaning _________

Lead nitrate on strong heating decomposes to form lead oxide which is ________ [reddish brown /yellow] when hot and ________ [white/yellow] when cold.

The dehydrated product obtained when sugar reacts with conc. sulphuric acid is _______ .

When an atom or an ion loses an electron, it is said to be ________. (oxidised/reduced)

Choose the word or phrase from the bracket which correctly complete each of the following statement:
Metals are good ................. (oxidising agents/reducing agents) because they are electron ............. (acceptors/donors).

Complete the following:
The ions in ……………… compounds are held very strongly due strong ……. Forces (electrovalent, covalent, electromagnetic, electrostatic).

Fill in the blanks:
Froath floatation process is generally used to concentrate ………… ores (sulphide/carbonate).

Metals form positive ions while non- metals ______.