Which is used for artificial ripening of fruit ?
Which is used for artificial ripening of fruit ?
A. ethane
B. ethene
C. ethyne
D. methane
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Traffic policemen on duty at busy street crossings during heavy traffic rush hours are advised to use:__________?
Traffic policemen on duty at busy street crossings during heavy traffic rush hours are advised to use:__________?A. Hydrogen tank
B. Nitrogen tank
C. Oxygen tank
D. None of theseTraffic policemen on duty at busy street crossings during heavy traffic rush hours are advised to use oxygen tanks in developed countries
In melting of iron, which of the following reactions takes place in Bladt Furnace at 400°C- 600°C________?
In melting of iron, which of the following reactions takes place in Bladt Furnace at 400°C- 600°C________?A. CaO+ SiO2——> CaSiO3
B. 2FeS+3O2——–> 2Fe+ SO2
C. FeSiO3———> FeSiO3
D. Fe2O3+ 3CO——–> 2Fe+ 3CO2Which one of the following element has highest oxidation state in its compounds ?
Which one of the following element has highest oxidation state in its compounds ?A. Cr
B. Mn
C. Sn
D. OAmmonia may be prepared by heating ammonium chloride with_______________?
Ammonia may be prepared by heating ammonium chloride with_______________?A. Water
B. NaCl
C. Aqueous sodium hydroxide
D. H2SO4Oxidation of primary alcohol gives________________?
Oxidation of primary alcohol gives________________?A. ketone
B. Aldehyde
C. Alkene then – COOH
D. EsterAgCl dissolved with conc (2×10-2) Ksp will be__________________?
AgCl dissolved with conc (2×10-2) Ksp will be__________________?A. 3.6 x 10-6
B. 3.6 x 10-5
C. 7.2 x 10-6
D. 4 x 10-4