Which of the following gases can be used for storage of fresh sample of an oil for a long time ?a)Carbon dioxide or oxygenb)Nitrogen or oxygenc)Carbon dioxide or heliumd)Helium or nitrogenCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Option d is correct. Because, oil foods such as chips will reacts with Oxygen to produce foul smell and taste. So, the oil food items are flushed with the inert gases like Helium and Nitrogen gas.

Answer

Helium or nitrogen both can be used for storage of fresh sample of an oil for a long time. These gases are called inert gases as they do not react with most elements including oxygen

Answer

Correct answer is D because helium and nitrogen are used to prevent food from getting oxidized.If we kept the food outside for a long time the food get oxidized or it become rancid.This process is known as rancidity.(We can know whether a substance become rancid or not by tasting them or by smell).

Answer

Option [d] becoz-->
Helium, as well as nitrogen, can be used for storage of a fresh sample of an oil for a long time because they abstain the oil from rancidity.The contact of air and oil is prevented by using nitrogen or helium as blanketing gas.

Answer

To analyze the given scenario, let's consider the reactions that could occur when NaOH, anhydrous CuSO4, and NaCl are added to water:

1. NaOH: NaOH is a strong base and when added to water, it undergoes a neutralization reaction with water, releasing heat. This is an exothermic process.

2. Anhydrous CuSO4: Anhydrous CuSO4 is a dehydrating agent. When added to water, it absorbs water molecules, resulting in the dissolution of CuSO4. This process is also exothermic.

3. NaCl: NaCl is a salt that dissolves in water without any significant heat changes. This process is neither exothermic nor endothermic.

Based on these reactions, let's analyze the statements:

(i) In beakers A and B, exothermic process has occurred.
- This statement is correct. The addition of NaOH and anhydrous CuSO4 to water in beakers A and B results in exothermic reactions, leading to an increase in temperature.

(ii) In beakers A and B, endothermic process has occurred.
- This statement is incorrect. The reactions in beakers A and B are exothermic, not endothermic.

(iii) In beaker C, exothermic process has occurred.
- This statement is incorrect. The addition of NaCl to water does not result in any significant heat changes, so no exothermic process occurs.

(iv) In beaker C, endothermic process has occurred.
- This statement is correct. Since there is a decrease in temperature in beaker C, it indicates that an endothermic process has occurred. However, it is important to note that the addition of NaCl to water does not typically result in a significant temperature change.

Therefore, the correct statement is: (i) and (iv).

Answer

Option D : Helium or nitrogen

Answer

The answer is opt D)helium and nitrogen
in opt a)and b) oxygen is there if we add oxygen to the oil it will get oxidised actually we r adding this to stop them being oxidised because if they get oxidised they get spoiled
and in opt c)carbon dioxide is there which will also oxidise the oil

Similar Class 10 Doubts

Which of the following gases can be used for storage of fresh sample of an oil for a long time?

Which of the following gases can be used for storage of fresh sample of an oil for a long time?

Which of the following gases can be used for storage of fresh sample of an oil for a long time?

Q1-Which of the following gases can be used for storage? * 2 points Option 1(

Select the incorrect statement.

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