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Todays' Thought
Action to be effective must be directed to clearly conceived ends.
- Jawaharlal Nehru
कार्य के प्रभावी होने के लिए उसे स्पष्ठ लक्ष्य की तरफ निर्देशित किया जाना चाहिए |
- जवाहरलाल नेहरु


    Chemistry Question & Answer in English

31.
The chemical symbol of sodium is -
A.  So
B.  Sd
C.  Na
D.  Nu

32.
The acid generally stored in batteries is -
A.  Nitric Acid
B.  Hydrochloric Acid
C.  Sulphuric Acid
D.  Acetic Acid

33.
Brass is an alloy of -
A.  Copper and tin
B.  Copper and Zinc
C.  Copper and Aluminium
D.  Iron and Copper

34.
Contact lenses are made from - 
A.  Polyvinyle chloride
B.  Teflon
C.  Poly styrene
D.  Lucite

35.
Which gas is filled in refrigerators -
A.  Chlorofluoro carbon
B.  Acetylene
C.  Methane
D.  Butane

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