Question

‘Bordeaux Mixture’ is used as a fungicide. It is a mixture of:
A.$CaS{{O}_{4}}+Cu{{(OH)}_{2}}$
B.$CuS{{O}_{4}}+Ca{{(OH)}_{2}}$
C.$CuS{{O}_{4}}+CaO$
D.$CuO+CaO$

Answer 1

We were asked to find the formula of Bordeaux Mixture. To find the formula, first we need to understand how the mixture is formed. So we will discuss the chemical reaction of the compound which makes this mixture. It is a mixture of copper sulphate, lime, and water. This is a compound which is an effective fungicide and also a bactericide. It is used to control diseases in vine fruits, nut trees and ornamental plants.

Complete step by step answer:
Bordeaux Mixture is a combination of copper (II) sulphate and slaked lime used as a fungicide. It is utilized in vineyards, fruit-farms and gardens to prevent infestations of downy moulds, powdery mildew and other fungi. Is sprayed on flora as a preventive treatment; its mode of motion is ineffective after a fungus has emerged as mounted. If its miles are implemented in huge quantities yearly for decades, the copper inside the mixture ultimately will become a pollutant. In addition to its use to manipulate fungal infection on grape vines, the mixture is also extensively used to manipulate potato blight, peach leaf curl and apple scab. It is approved for natural use, so is frequently utilized by natural gardeners where nonorganic gardeners would decide on different controls.
$CuS{{O}_{4}}+Ca{{(OH)}_{2}}\to Cu{{(OH)}_{2}}+CaS{{O}_{4}}$
Hence option A is the correct one.

Additional Information:
Bordeaux aggregate achieves its effect by means of the copper ions ($Cu^{2+}$) of the mixture. These ions have an effect on enzymes within the fungal spores in this sort of way as to prevent germination. This means Bordeaux aggregate should be used preventively, earlier than the fungal disease has struck.

Note:
Bordeaux combination can be prepared using differing proportions of the additives. In preparing it, the $CuSO_4$ and the lime are dissolved one by one in water and then blended. Calcium oxide (burnt lime) and calcium hydroxide (slaked lime) supply the identical stop result, considering an excess of water is used in the preparation. The conventional approach of describing the aggregate's composition is to offer the burden of $CuSO_4$, the burden of hydrated lime and the extent of water, in that order. The percentage of the burden of $CuSO_4$ to the burden of water employed determines the attention of the combination.