Rain water becomes acidic because gases present in environment are dissolved so it's pH will be less than \(7 .\) pH of rain water is approximate 5.6
09. HYDROGEN (HM)
180134
पानी की अस्थायी कठोरता का कारण है
1 \(Na_2SO_4\)
2 \(NaCl\)
3 \(Ca(HCO_3)_2\)
4 \(CaCl_2\)
Explanation:
The temporary hardness of water is due to the presence of calcium hydrogen carbonate \(\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2}\) Calcium hydrogen carbonate decomposes when heated. This happens when water is boiled, resulting in the formation of insoluble calcium carbonate. The precipitation reaction is as follows: \(\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2} \rightarrow \mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CaCO}_{3} \downarrow\)
09. HYDROGEN (HM)
180135
हाइड्रोजन के समस्थानिकों की कुल संख्या तथा उनमें रेडियोधर्मी समस्थानिकों की संख्या, क्रमशः हैं
1 \(3\) तथा \(1\)
2 \(3\) तथा \(2\)
3 \(2\) तथा \(1\)
4 \(2\) तथा \(0\)
Explanation:
Total number of isotopes of hydrogen is 3 \(\Longrightarrow{ }_{2}^{1} \mathrm{H},{ }_{1}^{2} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{D},{ }_{1}^{3} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{T}\) and only \({ }_{1}^{3} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{T}\) is a radioactive element. Hence, the correct option is \(\mathrm{A}\).
09. HYDROGEN (HM)
180161
निम्नलिखित अभिक्रियाओं में कौन सी \(H _{2} O _{2}\) की ऑक्सीकारी प्रवत्ति को दर्शाती है$?$
1 \(KIO _{4}+ H _{2} O _{2} \rightarrow KIO _{3}+ H _{2} O + O _{2}\)
2 \(2 I ^{-}+ H _{2} O _{2}+2 H ^{+} \rightarrow I _{2}+2 H _{2} O\)
3 \(I _{2}+ H _{2} O _{2}+2 OH ^{-} \rightarrow 2 I ^{-}+2 H _{2} O + O _{2}\)
4 \(Cl _{2}+ H _{2} O _{2} \rightarrow 2 HCl + O _{2}\)
Explanation:
\(I ^{-}\) is oxidised to \(I _{2}\) by \(H _{2} O _{2}\) Hence answer is \((2)\)
09. HYDROGEN (HM)
180173
हाइड्रोजन का एक रेडियोएक्टिव समस्थानिक, ट्राइटियम, निम्न में से किस कण का उत्सर्जन करता है ?
Rain water becomes acidic because gases present in environment are dissolved so it's pH will be less than \(7 .\) pH of rain water is approximate 5.6
09. HYDROGEN (HM)
180134
पानी की अस्थायी कठोरता का कारण है
1 \(Na_2SO_4\)
2 \(NaCl\)
3 \(Ca(HCO_3)_2\)
4 \(CaCl_2\)
Explanation:
The temporary hardness of water is due to the presence of calcium hydrogen carbonate \(\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2}\) Calcium hydrogen carbonate decomposes when heated. This happens when water is boiled, resulting in the formation of insoluble calcium carbonate. The precipitation reaction is as follows: \(\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2} \rightarrow \mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CaCO}_{3} \downarrow\)
09. HYDROGEN (HM)
180135
हाइड्रोजन के समस्थानिकों की कुल संख्या तथा उनमें रेडियोधर्मी समस्थानिकों की संख्या, क्रमशः हैं
1 \(3\) तथा \(1\)
2 \(3\) तथा \(2\)
3 \(2\) तथा \(1\)
4 \(2\) तथा \(0\)
Explanation:
Total number of isotopes of hydrogen is 3 \(\Longrightarrow{ }_{2}^{1} \mathrm{H},{ }_{1}^{2} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{D},{ }_{1}^{3} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{T}\) and only \({ }_{1}^{3} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{T}\) is a radioactive element. Hence, the correct option is \(\mathrm{A}\).
09. HYDROGEN (HM)
180161
निम्नलिखित अभिक्रियाओं में कौन सी \(H _{2} O _{2}\) की ऑक्सीकारी प्रवत्ति को दर्शाती है$?$
1 \(KIO _{4}+ H _{2} O _{2} \rightarrow KIO _{3}+ H _{2} O + O _{2}\)
2 \(2 I ^{-}+ H _{2} O _{2}+2 H ^{+} \rightarrow I _{2}+2 H _{2} O\)
3 \(I _{2}+ H _{2} O _{2}+2 OH ^{-} \rightarrow 2 I ^{-}+2 H _{2} O + O _{2}\)
4 \(Cl _{2}+ H _{2} O _{2} \rightarrow 2 HCl + O _{2}\)
Explanation:
\(I ^{-}\) is oxidised to \(I _{2}\) by \(H _{2} O _{2}\) Hence answer is \((2)\)
09. HYDROGEN (HM)
180173
हाइड्रोजन का एक रेडियोएक्टिव समस्थानिक, ट्राइटियम, निम्न में से किस कण का उत्सर्जन करता है ?
Rain water becomes acidic because gases present in environment are dissolved so it's pH will be less than \(7 .\) pH of rain water is approximate 5.6
09. HYDROGEN (HM)
180134
पानी की अस्थायी कठोरता का कारण है
1 \(Na_2SO_4\)
2 \(NaCl\)
3 \(Ca(HCO_3)_2\)
4 \(CaCl_2\)
Explanation:
The temporary hardness of water is due to the presence of calcium hydrogen carbonate \(\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2}\) Calcium hydrogen carbonate decomposes when heated. This happens when water is boiled, resulting in the formation of insoluble calcium carbonate. The precipitation reaction is as follows: \(\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2} \rightarrow \mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CaCO}_{3} \downarrow\)
09. HYDROGEN (HM)
180135
हाइड्रोजन के समस्थानिकों की कुल संख्या तथा उनमें रेडियोधर्मी समस्थानिकों की संख्या, क्रमशः हैं
1 \(3\) तथा \(1\)
2 \(3\) तथा \(2\)
3 \(2\) तथा \(1\)
4 \(2\) तथा \(0\)
Explanation:
Total number of isotopes of hydrogen is 3 \(\Longrightarrow{ }_{2}^{1} \mathrm{H},{ }_{1}^{2} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{D},{ }_{1}^{3} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{T}\) and only \({ }_{1}^{3} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{T}\) is a radioactive element. Hence, the correct option is \(\mathrm{A}\).
09. HYDROGEN (HM)
180161
निम्नलिखित अभिक्रियाओं में कौन सी \(H _{2} O _{2}\) की ऑक्सीकारी प्रवत्ति को दर्शाती है$?$
1 \(KIO _{4}+ H _{2} O _{2} \rightarrow KIO _{3}+ H _{2} O + O _{2}\)
2 \(2 I ^{-}+ H _{2} O _{2}+2 H ^{+} \rightarrow I _{2}+2 H _{2} O\)
3 \(I _{2}+ H _{2} O _{2}+2 OH ^{-} \rightarrow 2 I ^{-}+2 H _{2} O + O _{2}\)
4 \(Cl _{2}+ H _{2} O _{2} \rightarrow 2 HCl + O _{2}\)
Explanation:
\(I ^{-}\) is oxidised to \(I _{2}\) by \(H _{2} O _{2}\) Hence answer is \((2)\)
09. HYDROGEN (HM)
180173
हाइड्रोजन का एक रेडियोएक्टिव समस्थानिक, ट्राइटियम, निम्न में से किस कण का उत्सर्जन करता है ?
Rain water becomes acidic because gases present in environment are dissolved so it's pH will be less than \(7 .\) pH of rain water is approximate 5.6
09. HYDROGEN (HM)
180134
पानी की अस्थायी कठोरता का कारण है
1 \(Na_2SO_4\)
2 \(NaCl\)
3 \(Ca(HCO_3)_2\)
4 \(CaCl_2\)
Explanation:
The temporary hardness of water is due to the presence of calcium hydrogen carbonate \(\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2}\) Calcium hydrogen carbonate decomposes when heated. This happens when water is boiled, resulting in the formation of insoluble calcium carbonate. The precipitation reaction is as follows: \(\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2} \rightarrow \mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CaCO}_{3} \downarrow\)
09. HYDROGEN (HM)
180135
हाइड्रोजन के समस्थानिकों की कुल संख्या तथा उनमें रेडियोधर्मी समस्थानिकों की संख्या, क्रमशः हैं
1 \(3\) तथा \(1\)
2 \(3\) तथा \(2\)
3 \(2\) तथा \(1\)
4 \(2\) तथा \(0\)
Explanation:
Total number of isotopes of hydrogen is 3 \(\Longrightarrow{ }_{2}^{1} \mathrm{H},{ }_{1}^{2} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{D},{ }_{1}^{3} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{T}\) and only \({ }_{1}^{3} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{T}\) is a radioactive element. Hence, the correct option is \(\mathrm{A}\).
09. HYDROGEN (HM)
180161
निम्नलिखित अभिक्रियाओं में कौन सी \(H _{2} O _{2}\) की ऑक्सीकारी प्रवत्ति को दर्शाती है$?$
1 \(KIO _{4}+ H _{2} O _{2} \rightarrow KIO _{3}+ H _{2} O + O _{2}\)
2 \(2 I ^{-}+ H _{2} O _{2}+2 H ^{+} \rightarrow I _{2}+2 H _{2} O\)
3 \(I _{2}+ H _{2} O _{2}+2 OH ^{-} \rightarrow 2 I ^{-}+2 H _{2} O + O _{2}\)
4 \(Cl _{2}+ H _{2} O _{2} \rightarrow 2 HCl + O _{2}\)
Explanation:
\(I ^{-}\) is oxidised to \(I _{2}\) by \(H _{2} O _{2}\) Hence answer is \((2)\)
09. HYDROGEN (HM)
180173
हाइड्रोजन का एक रेडियोएक्टिव समस्थानिक, ट्राइटियम, निम्न में से किस कण का उत्सर्जन करता है ?
Rain water becomes acidic because gases present in environment are dissolved so it's pH will be less than \(7 .\) pH of rain water is approximate 5.6
09. HYDROGEN (HM)
180134
पानी की अस्थायी कठोरता का कारण है
1 \(Na_2SO_4\)
2 \(NaCl\)
3 \(Ca(HCO_3)_2\)
4 \(CaCl_2\)
Explanation:
The temporary hardness of water is due to the presence of calcium hydrogen carbonate \(\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2}\) Calcium hydrogen carbonate decomposes when heated. This happens when water is boiled, resulting in the formation of insoluble calcium carbonate. The precipitation reaction is as follows: \(\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2} \rightarrow \mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CaCO}_{3} \downarrow\)
09. HYDROGEN (HM)
180135
हाइड्रोजन के समस्थानिकों की कुल संख्या तथा उनमें रेडियोधर्मी समस्थानिकों की संख्या, क्रमशः हैं
1 \(3\) तथा \(1\)
2 \(3\) तथा \(2\)
3 \(2\) तथा \(1\)
4 \(2\) तथा \(0\)
Explanation:
Total number of isotopes of hydrogen is 3 \(\Longrightarrow{ }_{2}^{1} \mathrm{H},{ }_{1}^{2} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{D},{ }_{1}^{3} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{T}\) and only \({ }_{1}^{3} \mathrm{H}\) or \({ }_{1}^{3} \mathrm{T}\) is a radioactive element. Hence, the correct option is \(\mathrm{A}\).
09. HYDROGEN (HM)
180161
निम्नलिखित अभिक्रियाओं में कौन सी \(H _{2} O _{2}\) की ऑक्सीकारी प्रवत्ति को दर्शाती है$?$
1 \(KIO _{4}+ H _{2} O _{2} \rightarrow KIO _{3}+ H _{2} O + O _{2}\)
2 \(2 I ^{-}+ H _{2} O _{2}+2 H ^{+} \rightarrow I _{2}+2 H _{2} O\)
3 \(I _{2}+ H _{2} O _{2}+2 OH ^{-} \rightarrow 2 I ^{-}+2 H _{2} O + O _{2}\)
4 \(Cl _{2}+ H _{2} O _{2} \rightarrow 2 HCl + O _{2}\)
Explanation:
\(I ^{-}\) is oxidised to \(I _{2}\) by \(H _{2} O _{2}\) Hence answer is \((2)\)
09. HYDROGEN (HM)
180173
हाइड्रोजन का एक रेडियोएक्टिव समस्थानिक, ट्राइटियम, निम्न में से किस कण का उत्सर्जन करता है ?
