Everyday Chemistry — Set 5
Chemistry · रोजमर्रा का रसायन · Questions 41–50 of 50
Which gas is used to fill potato chip bags to keep them fresh and prevent oxidation?
Correct Answer: A. Nitrogen
• **Nitrogen** = is used for its specific properties and applications. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: B: chemical compound but different type; C: incorrect choice for stated use; D: incorrect choice for stated use.
What is the chemical name of 'Washing Soda'?
Correct Answer: D. Sodium Carbonate
• **Sodium Carbonate** = is the correct answer to this question. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: A: chemical compound but different type; B: chemical compound but different type; C: chemical compound but different type.
Which metal is the most abundant in the Earth's crust?
Correct Answer: D. Aluminium
• **Aluminium** = is the correct answer to this question. • **Industrial use** — extracted and processed for various applications. • 💡 Wrong-option analysis: A: incorrect choice for stated use; B: different metal element; C: different metal element.
Which chemical is used to hasten the ripening of fruits like bananas and mangoes?
Correct Answer: A. Calcium Carbide
• **Calcium Carbide** = is used for its specific properties and applications. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: B: chemical compound but different type; C: incorrect choice for stated use; D: incorrect choice for stated use.
Which substance is used in the making of 'dry cells' or common torch batteries?
Correct Answer: B. Ammonium Chloride
• **Ammonium Chloride** = is used for its specific properties and applications. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: A: chemical compound but different type; C: different chemical category; D: chemical compound but different type.
Which gas is used in bright, colorful advertising signs?
Correct Answer: A. Neon
• **Neon** = is used for its specific properties and applications. • **Light emission** — produces distinct, visible spectral lines when heated. • 💡 Wrong-option analysis: B: incorrect choice for stated use; C: incorrect choice for stated use; D: incorrect choice for stated use.
Which chemical is the main component of 'marble' and 'chalk'?
Correct Answer: B. Calcium Carbonate
• **Calcium Carbonate** = is the primary chemical component. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: A: incorrect choice for stated use; C: chemical compound but different type; D: chemical compound but different type.
Which chemical is commonly known as 'Caustic Soda'?
Correct Answer: A. Sodium Hydroxide
• **Sodium Hydroxide** = is commonly used in practical applications. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: B: chemical compound but different type; C: chemical compound but different type; D: chemical compound but different type.
Which of the following is used in pencil erasers to make them soft?
Correct Answer: C. Synthetic Rubber
• **Synthetic Rubber** = is used for its specific properties and applications. • **Key characteristic** — possesses unique properties for its intended use. • 💡 Wrong-option analysis: A: incorrect choice for stated use; B: incorrect choice for stated use; D: incorrect choice for stated use.
Which chemical compound is used as an antiseptic in mouthwash?
Correct Answer: B. Thymol
• **Thymol** = is the correct answer to this question. • **Chemical properties** — possesses specific reactivity and behavior. • 💡 Wrong-option analysis: A: chemical compound but different type; C: chemical compound but different type; D: incorrect choice for stated use.