Q: Which one of the following statements about alkaline earth metals is NOT true?
(a)Strontium salts burn with a red flame
(b)Barium metal is used in medicine to examine the alimentary canal of a patient by X-ray
(c)Green plants need magnesium in order to make the chlorophyll that trap the energy from sunlight in photosynthesis
(d)Red colour of gemstone Ruby is due to the element beryllium present in it
Correct Answer: (d)
The correct answer is (a) 'स्ट्रॉन्शियम नयन धूल पर लाल ज्वाला उत्पन्न करते हैं'. This question from the General Studies domain tests knowledge of Miscellaneous.