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1. H2S(g) + Cl2(g) → 2HCL(g) + S(s) The reaction is interpreted as (NTSE Delhi, Stage-I, 2012-13)
H2S is getting oxidized and Cl2 is getting reduced
H2S is getting reduced and Cl2 is getting oxidized
Only H2S is oxidized
Both H2S and Cl2 are reduced
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2. Which of the following reactions is involved in black and white photography?
ZnO + C → Zn + CO
3. Food cans are coated with tin and not with zinc because (NTSE Panchkula, Chandigarh, Stage-I, 2012-13)
Zinc is costlier than tin
Zinc has a higher melting point than tin
Zinc is more reactive than tin
Zinc is less reactive than tin
4. Two metals which will displace hydrogen and two metals which will not displace hydrogen from dilute acids, respectively are (NTSE Panch kula, Chandigarh, Stage-I, 2012-13)
Potassium, Calcium, Aluminium and Zinc
Sodium, Calcium, Zinc and Iron
Zinc, Iron, Copper, and Mercury
Copper, Mercury, Silver and Gold
5. H2S(g) + CI2 (g) → 2HCI(g) + S( s) The reaction is interpreted as (NTSE Delhi, Stage-I, 2012-13)
H2S is getting oxidized and CI2 is getting reduced
H2S is getting reduced and CI2 is getting oxidized
Both H2S and CI2 are reduced
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