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Todays' Thought
Winners don’t do different things, they do things differently.
- Shiv Khera
जीतने वाले अलग चीजें नहीं करते, वो चीजों को अलग तरह से करते हैं |
- शिव खेड़ा


    Chemistry Question & Answer in English

11.
First atomic theory was proposed by -
A.  John Dalton
B.  E. Rutherford
C.  De Broglie
D.  D.I. Mendeleef

12.
Normal valence of nitrogen is -
A.  2
B.  3
C.  4
D.  5

13.
Which of the following gas is used in eigarette lighters -
A.  Butane
B.  Propane
C.  Methane
D.  Ethane

14.
Which of the following is not a non-electrolyte-
A.  Acetic Acid
B.  Ethanol
C.  Glucose
D.  Urea

15.
Permanent Hardness of the water can be removed by adding -
A.  Soda lime
B.  Washing soda
C.  Sodium Bicarbonate
D.  Sodium chloride

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