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Assertion : 2, 4-D is widely used by far...

Assertion : 2, 4-D is widely used by farmers in agricultural and horticultural practices.
Reason : Flowering in most plants can be intiated by using high concerntration of auxin.

A

If Both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)

B

If both Assertion and reason are true but the reason is not the correct explanation of the assertion, then mark (2).

C

If Assertion is true statement but reason is false, then mark (3)

D

If both Assertion and reason are false statements, then mark (4).

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Assertion**: The assertion states that "2, 4-D is widely used by farmers in agricultural and horticultural practices." - **Explanation**: 2, 4-D, or 2,4-Dichlorophenoxyacetic acid, is a synthetic auxin that is commonly used as a herbicide. It helps in controlling weeds that compete with crops for nutrients and resources. 2. **Evaluating the Reason**: The reason given is "Flowering in most plants can be initiated by using high concentration of auxin." - **Explanation**: Auxins are plant hormones that influence various growth processes, including cell elongation and differentiation. However, flowering is primarily regulated by other hormones, such as gibberellins, rather than auxins. High concentrations of auxin do not typically initiate flowering in most plants. 3. **Determining the Truth of Each Statement**: - The assertion is true because 2, 4-D is indeed used in agriculture and horticulture for weed control. - The reason is false because flowering is not primarily initiated by auxins; gibberellins play a more significant role in this process. 4. **Conclusion**: Based on the evaluation, the assertion is true, but the reason is false. Therefore, the correct answer is that the assertion is true, and the reason is false. **Final Answer**: Assertion is true, but the reason is false. ---
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Limestone is a naturally occuring form of calcium carbonate. It is used as building materials and also for manufacture of other building materials such as portland cement. It is used for the production of quickline and slaked lime which have wide applications in chemical, metallugical and construction industry. The pure CaCO_(3) , called precipitated calcium carbonate, is used extensively as filler, providing bulk to materials such as paint, plastics, printing links and rubber. it is also used in toothpastes, cosmetics and antacids. Quicklime and slaked lime are the cheapest and the most widely used bases for neutralising unwanted acids. Lime is used to neutralise acidic soils. An important application of quicklime is in air pollution control for the removal of SO_(2) in electric power plants. slaked lime is used in the manufature of other alkalis and bleacing powder, in sugar refinig, in tanning hide and in water softening. Quicklime is used in electric power plants with carbon to check pollution. What product of calcium is formed?

Limestone is a naturally occuring form of calcium carbonate. It is used as building materials and also for manufacture of other building materials such as portland cement. It is used for the production of quickline and slaked lime which have wide applications in chemical, metallugical and construction industry. The pure CaCO_(3) , called precipitated calcium carbonate, is used extensively as filler, providing bulk to materials such as paint, plastics, printing links and rubber. it is also used in toothpastes, cosmetics and antacids. Quicklime and slaked lime are the cheapest and the most widely used bases for neutralising unwanted acids. Lime is used to neutralise acidic soils. An important application of quicklime is in air pollution control for the removal of SO_(2) in electric power plants. slaked lime is used in the manufature of other alkalis and bleacing powder, in sugar refinig, in tanning hide and in water softening. The drying agent which absorbs CO_(2) and reacts violently with water is

Limestone is a naturally occuring form of calcium carbonate. It is used as building materials and also for manufacture of other building materials such as portland cement. It is used for the production of quickline and slaked lime which have wide applications in chemical, metallugical and construction industry. The pure CaCO_(3) , called precipitated calcium carbonate, is used extensively as filler, providing bulk to materials such as paint, plastics, printing links and rubber. it is also used in toothpastes, cosmetics and antacids. Quicklime and slaked lime are the cheapest and the most widely used bases for neutralising unwanted acids. Lime is used to neutralise acidic soils. An important application of quicklime is in air pollution control for the removal of SO_(2) in electric power plants. slaked lime is used in the manufature of other alkalis and bleacing powder, in sugar refinig, in tanning hide and in water softening. The substance not likely to contain CaCO_(3) is

Limestone is a naturally occuring form of calcium carbonate. It is used as building materials and also for manufacture of other building materials such as portland cement. It is used for the production of quickline and slaked lime which have wide applications in chemical, metallugical and construction industry. The pure CaCO_(3) , called precipitated calcium carbonate, is used extensively as filler, providing bulk to materials such as paint, plastics, printing links and rubber. it is also used in toothpastes, cosmetics and antacids. Quicklime and slaked lime are the cheapest and the most widely used bases for neutralising unwanted acids. Lime is used to neutralise acidic soils. An important application of quicklime is in air pollution control for the removal of SO_(2) in electric power plants. slaked lime is used in the manufature of other alkalis and bleacing powder, in sugar refinig, in tanning hide and in water softening. Slaked lime reacts with chlorine to give