Chemistry - Question & Answer with solution in Hindi & English

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Todays' Thought

Our fatigue is often caused not by work, but by worry, frustration and resentment.

- Dale Carnegie

अक्सर हमें थकान काम के कारण नहीं बल्कि चिंता, निराशा और असंतोष के कारण होती है |

- डेल कार्नेगी

Chemistry Question & Answer in English

Question in English

Question in Hindi

11.	First atomic theory was proposed by -

	A. John Dalton	B. E. Rutherford
	C. De Broglie	D. D.I. Mendeleef
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	Answer & Solution Hide Solution Box Answer : A Solution : John Dalton Report error Hide Error Report Box

12.	Normal valence of nitrogen is -

	A. 2	B. 3
	C. 4	D. 5
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	Answer & Solution Hide Solution Box Answer : B Solution : 3 Report error Hide Error Report Box

13.	Which of the following gas is used in eigarette lighters -

	A. Butane	B. Propane
	C. Methane	D. Ethane
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	Answer & Solution Hide Solution Box Answer : A Solution : Butane Report error Hide Error Report Box

14.	Which of the following is not a non-electrolyte-

	A. Acetic Acid	B. Ethanol
	C. Glucose	D. Urea
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	Answer & Solution Hide Solution Box Answer : A Solution : Acetic Acid Report error Hide Error Report Box

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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	Answer & Solution Hide Solution Box Answer : A Solution : Soda lime Report error Hide Error Report Box

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