Which of the following are true about pure rain water?
A. It is naturally acidic
B. It is naturally basic
C. It is neutral (neither acidic nor basic)
D. It's pH value is 7
E. It is called as acid rain when pH becomes less than 5.6
Choose the correct answer from the options given below:शुद्ध वर्षा जल के विषय में निम्नलिखित में से कौन-से कथन सत्य हैं?
A. यह प्राकृतिक रूप से अम्लीय होता है
B. यह प्राकृतिक रूप से क्षारीय होता है
C. यह उदासीन होता है (न अम्लीय, न क्षारीय)
D. इसका pH मान 7 होता है
E. जब pH 5.6 से कम हो जाता है तो इसे अम्ल वर्षा कहा जाता है
नीचे दिए गए विकल्पों में से सही उत्तर चुनिए:
Pick an option to check yourself, or open the answer below.
Show answer & explanation
Correct answer: A. A and E Onlyकेवल A और E
Explanation
Rain water dissolves atmospheric carbon dioxide and forms weak carbonic acid, so even unpolluted rain is slightly acidic with a pH of about 5.6 — not 7 and not neutral. When pollutants such as SO₂ and NOₓ push the pH below 5.6, the rain is called acid rain. Hence A and E only.वर्षा जल वायुमंडलीय कार्बन डाइऑक्साइड को घोलकर दुर्बल कार्बोनिक अम्ल बनाता है, अतः अप्रदूषित वर्षा भी हल्की अम्लीय होती है जिसका pH लगभग 5.6 होता है — न कि 7 और न ही उदासीन। जब SO₂ तथा NOₓ जैसे प्रदूषक pH को 5.6 से नीचे ले आते हैं, तब उस वर्षा को अम्ल वर्षा कहते हैं। अतः केवल A और E।More People, Development and Environment questions
- In which of the following steps of hydrological cycle water is purified?
- The scale, which not only measures the intensity of earthquake but also its impact on people, is known as
- Match the LIST-I with LIST-IILIST-I (Disinfectant byproducts (DBPs) of Chlorine) LIST-II (Chemical Composition) A. Dibromochloromethane I.…
- Which of the following are true about moderator used in nuclear reactors? A. Moderators slow down neutrons to sustain the chain reaction B.…
- What is the correct sequence, from initial to final, of blue baby disease, methemoglobinemia, in human infants? A. Conversion of nitrate io…
- Electrostatic Precipitator is used in Thermal Power Plants to remove which of the following air pollutants?