Chemistry
Thermite mixture is used to weld the broken ends of the iron girders. This mixture consists of ferric oxide and aluminium powder, which, when heated, produces molten iron. In this reaction, the aluminium powder acts as a/an …………… agent.
- oxidising
- reducing
- dehydrating
- corroding
Related Questions
Prateek added warm water to magnesium nitride, and a colourless gas evolved, which, when tested with phenolphthalein, turned it pink. The gas evolved is:
- Carbon dioxide
- Ammonia
- Nitrogen
- Hydrogen chloride
Which of the following statements about ethane is false?
- It is a saturated hydrocarbon.
- It undergoes a substitution reaction.
- It is a gas at ordinary temperatures.
- It has a triple bond between the carbon atoms.
The below diagram represents the electrolysis of acidulated water. The reaction occurring at the anode is:
- H2SO4 ⟶ 2H+ + SO42-
- H2O ⟶ H+ + OH-
- H+ + e- ⟶ H, 2[H] + 2[H] ⟶ H2
- OH- - e- → OH, [4OH] ⟶ 2H2O + O2
Group number 1A
1IIA
2IIIA
13IVA
14VA
15VIA
16VIIA
17VIIIA
18Li D O J Ne A Mg E Si H K B C F G L With reference to the portion of the periodic table given above, identify the element having the largest atomic size:
- Li
- B
- K
- L