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Question

Choose the correct statement(s).
सही कथन/कथनों का चयन कीजिए।

A
Aqueous solutions of SO2, CO2, SO3 and CO turn red litmus blue
SO2, CO2, SO3 तथा CO के जलीय विलयन लाल लिटमस को नीला कर देते हैं
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B
Aqueous solutions of Na2O, K2O, CaO and MgO turn phenolphthalein pink
Na2O, K2O, CaO तथा MgO के जलीय विलयन फीनॉल्फ़थेलिन को गुलाबी कर देते हैं
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C
Al2O3 and ZnO react with both acids and bases to produce salt and water
Al2O3 तथा ZnO अम्ल तथा क्षार दोनों के साथ अभिक्रिया करके लवण तथा जल देते हैं
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D
Gold and silver do not react with oxygen even at elevated temperatures
गोल्ड तथा सिल्वर उन्नत ताप पर भी ऑक्सीज़न के साथ अभिक्रिया नहीं करते हैं
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Solution

The correct option is D Gold and silver do not react with oxygen even at elevated temperatures
गोल्ड तथा सिल्वर उन्नत ताप पर भी ऑक्सीज़न के साथ अभिक्रिया नहीं करते हैं
Solution

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