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Rotavator is tractor driven rotary tillage machine. It is economical and effective against cultivator, leveller and disc harrow. Rotavator is used for breaking up the soil, land leveling, field preparation, weeding, etc.
Which polymer is formed by the copolymerization of phenol and formaldehyde?
Which element causes whiptail disease in plants?
Which one of the following gases is supporter of combustion?
A radioactive substance emits?
Which gas is evolved during the reaction of an acid with a metal?
Activated charcoal is used to remove colouring matter from pure substances by which of the following process?
When acid is added to the indicator- methyl orange, what is the color observed?
What is the chemical formula of rust?
Match the following columns and choose the correct option:
Column I A. Leishmania donovani B. Trypanosoma gambiense C. Entamoeba histolytica D. W...
The reaction of an aldehyde with Tollens’ reagent results in: