Question

An iron nail is kept in each of the following liquids. In which case would it loose its shine and appear dull?

a- Mustard Oil
b- Soft Drink
c- Coconut Oil
d- Kerosene​

Answer 1

Answer:

Question 1:

An iron nail is kept in each of the following liquids. In which case would it lose its shine and appear dull?

(a) Mustard oil

(b) Soft drink

(c) Coconut oil

(d) Kerosene

Solution:

(b) An iron nail kept in soft drink would lose its shine and appear dull became soft drink contains carbonic acid which reacts with iron nail, so it gives dull appearance.

Iron nail has no reaction with mustard oil, coconut oil and kerosene, so does not lose its shine, when kept in these solutions.

Answer 2

Among the given options,(B) soft drink contains carbonic acid. i. The acid reacts with an iron nail and as a result, it loses its shine and appears dull.

Explanation:

• Mustard Oil: Pure mustard oil and mustard essential oil may aid to reduce inflammation and pain, inhibit microbial growth, and improve hair and skin health. Both can be used topically in massage oils, face masks, and hair treatments after being diluted with a carrier oil.
• Soft drink:To distinguish flavoured drinks from hard liquor, or distilled alcohol, the phrase "soft drink" was coined. In an effort to modify early Americans' hard-drinking habits, soft drinks were offered as a substitute.
• Coconut Oil: Natural saturated fats in coconut oil raise HDL (good) cholesterol levels in the body. They may also aid in the conversion of LDL (bad) cholesterol into a form that is less toxic. Many scientists feel that coconut oil, unlike many other fats, can improve heart health by boosting HDL.
• Kerosin: Kerosene, often spelled kerosine, is a flammable hydrocarbon liquid that is extensively used as a fuel. It is also known as paraffin or paraffin oil. Kerosene is often pale yellow or colourless in appearance, with a pleasant odour. ... Petroleum, discovered by Drake in 1859, immediately became the primary source of kerosene.