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46. Identify the type of reaction taking place in Fe + CuS04→ Cu + FeS04 (NTSE Tamil Nadu, Stage-I, 2014-15)
Redox reaction
Displacement reaction
Neutralization
Precipitation reaction
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47. The chips manufacturers usually, flush bags of chips with this 'gas' to prevent the chips from being oxidized and become rancid. (NTSE Karnataka, Stage-I, 2014-15)
Oxygen
Hydrogen
Nitrogen
Chlorine
48. The example for exothermic reaction is (NTSE Karnataka, Stage-I, 2014-15)
Melting of ice cubes
Decomposition of vegetable matter into compost
Cooking an egg
Baking bread
49. Mg + CuO → MgO + Cu Which of the following is wrong relating to the above reaction? (NTSE Andhra Pradesh, Stage-I, 2014-15)
CuO gets reduced
Mg gets oxidised
CuO gets oxidised
It is a redox reaction
50. In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate? (NTSE Chandigarh, Stage-I, 2014-15)
Lead sulphate (insoluble)
Lead acetate
Ammonium nitrate
Potassium sulphate
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