PDF chapter test TRY NOW
1. A is a reddish brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A,B and C with reaction.
i. A is a reddish brown metal -
ii. \(2Cu + O_2 \xrightarrow[]{<1370} 2CuO\) (B)
iii. \(4Cu + O_2 \xrightarrow[]{>1370} 2Cu_2O\) (C)
A -
B -
C -
2. A is a silvery white metal. A combines with O2 to form B at 800°C, the alloy of A is used in making the aircraft. Find A and B.
A - Silvery white metal -
B. \(4Al\) + \(3O_2\) \(\xrightarrow[]{}\) (B)
The alloys of aluminium, are used in making the aircraft.
A -
B -
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