Chemistry Questions Practice Question and Answer

Q:

निम्नलिखित में से किसको 'वुड स्पिरिट' भी कहा जाता है? 

1378 0

  • 1
    मेथिल एल्कोहॉल
    Correct
    Wrong
  • 2
    एथिल एल्कोहॉल
    Correct
    Wrong
  • 3
    इथीलीन ग्लाइकाल
    Correct
    Wrong
  • 4
    ग्लिसरॉल
    Correct
    Wrong
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Answer : 1. "मेथिल एल्कोहॉल "

Q:

गुर्दे की पथरी बनाने के काम आने वाला व्यापक यौगिक कौनसा है?

1371 0

  • 1
    कैल्शियम ऑक्सालेट
    Correct
    Wrong
  • 2
    मैग्नीशियम ऑक्साइड
    Correct
    Wrong
  • 3
    सोडियम बाइकार्बोनेट
    Correct
    Wrong
  • 4
    मैग्नीशियम साइट्रेट
    Correct
    Wrong
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Answer : 1. "कैल्शियम ऑक्सालेट"

Q: Which two atoms form an ionic bond? 1351 0

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Answer :
Explanation :

Ionic bonding is a type of chemical bond in which valence electrons are lost from one atom and gained by another.. This bond generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.   Example :: One example of an ionic bond is the formation of sodium fluoride, NaF, from a sodium atom and a fluorine atom. In this reaction, the sodium atom loses its single valence electron to the fluorine atom, which has just enough space to accept it. The ions produced are oppositely charged and are attracted to one another due to electrostatic forces.

Q:

मूत्रालयों के पास प्रायः नाक में चुभने वाली गंध का कारण है – 

1306 0

  • 1
    अमोनिया
    Correct
    Wrong
  • 2
    यूरिया
    Correct
    Wrong
  • 3
    सल्फर-डाइऑक्साइड
    Correct
    Wrong
  • 4
    क्लोरीन
    Correct
    Wrong
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Answer : 1. " अमोनिया "

Q:

सबसे हल्की धातु होती है।

1232 0

  • 1
    पौटेशियम
    Correct
    Wrong
  • 2
    लिथियम
    Correct
    Wrong
  • 3
    सोडियम
    Correct
    Wrong
  • 4
    एल्युमिनियम
    Correct
    Wrong
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Answer : 2. "लिथियम"

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Answer : 2. "4 "

Q:

लेड पेंसिल में सीसे का प्रतिशत है : 

1186 0

  • 1
    zero
    Correct
    Wrong
  • 2
    20
    Correct
    Wrong
  • 3
    80
    Correct
    Wrong
  • 4
    7
    Correct
    Wrong
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Answer : 1. "zero "

Q:

निम्नलिखित में से कौन सा ब्रह्मांड में सबसे हल्का तत्व है? 

1177 0

  • 1
    नाइट्रोजन
    Correct
    Wrong
  • 2
    सिलिकॉन
    Correct
    Wrong
  • 3
    हीलियम
    Correct
    Wrong
  • 4
    हाइड्रोजन
    Correct
    Wrong
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Answer : 4. " हाइड्रोजन "

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