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R G PUBLICATION-H.S. Question papers of AHSEC,2019-Exercise
- Zn^(2+) salts are colourless while Cu^(2+) salts are coloured. Give re...
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- Calculate the number of unpaired electrons in Cr^(3+) and V^(3+) ions.
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- How will you convert the following? Give chemical equations only. Etha...
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- How will you convert the following? Give chemical equations only. Benz...
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- How will you convert the following? Give chemical equations only. Anil...
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- Give reasons : n-Butyl bromide has higher boiling point than t-Butyl b...
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- Why racimic mixture is optically inactive?
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- What are ambident nucleophiles? Give two examples of it. Give reason f...
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- Aniline does not undergo Friedel-Crafts reaction. why?
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- A compound forms hexagonal close packed (hcp) structure. What is the t...
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- A compound is formed by two elements M and N. The elements N forms ccp...
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- Calculate the efficiency of packing in case of a metal crystal for sim...
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- What will be the effect of temperature on rate constant?
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- A first order reaction has a rate constant of 10^(-2)s^( -1). How much...
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- Give reason why a finely divided substance is more effective as an ads...
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- What is an adsorption isotherm? In reference to Freundlich adsorption ...
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- Explain the role of the following in the processes mentioned: Depressa...
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- Describe the role of the following in the processes mentioned: Limesto...
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- Why the noble gases have very low boiling points?
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- Copper does not dissolve in HCI while it does dissolve in HNO3
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