hs 2nd year question paper for final year examination. collection of important question for all the seba board student much check
If you are going to appear for HS 2nd year final examination this year. Then this set of question will be very helpful for you. We have created the set of most important question paper for HS 2nd year 2020 AHSEC Seba board Assam.
> State whether true or false: (2018 AHSEC)
In Schottky defect, in order to maintain electroneutrality, the number of missing cations and anions are equal.
> Give the definition of solubility of a substance (2018 AHSEC)
> Why is nitrogen less reactive at room temperature? (2018 AHSEC)
> Give the structural formula of 2-methyl propane-2-ol. (2018 AHSEC)
> What are essential amino acids? (2018 AHSEC)
> What is chemotherapy? (2018 AHSEC)
> Show that total vapour pressure over the solution of two liquids 1 and 2 at a particular temperature varies linearly with their mole fraction of a component. (2018 AHSEC)
> Starting from the integrated Rate Law of a zeroth-order reaction, R-P, show that half lifetime of the reaction is directly proportional to the initial molar concentration of the reactant. (2018 AHSEC)
> Answer any one of the following: (2018 AHSEC)
- why does physisorption decrease with increase of temperature?
- why are powdered substances more effective adsorbent then their crystalline form?
> Answer any one of the following: (2018 AHSEC)
- what are antagonist and agonist drugs?
- give one example each of bacterial and bacteriostatic antibiotics.
> Answer any one of the following: (2018 AHSEC)
- what are semiconductors? how is electrical conductivity of semiconductors vary with temperature? give an example of intrinsic semiconductor.
- what are paramagnetism and ferromagnetism? what type of substances would make better permanent magnets — ferromagnetic or ferrimagnetic?
> Name one important ore of aluminium. give its chemical composition (2018 AHSEC)
> Give the Mond process for refining of Nickel. (2018 AHSEC)
> How copper is extracted from low-grade ore? (2018 AHSEC)
> What is the basic difference between a double salt and Co-ordination complex? (2018 AHSEC)
> Mention one analytical application of coordination compound. (2018 AHSEC)
> give a method of preparation of 3-degree Alcohol. (2018 AHSEC)
> write a chemical reaction to affect the following transformations: (2018 AHSEC)
- Butan-1-ol to butanoic acid
- Cyclohexane to hexane-1,6-dioic acid.
- Butanal to butanoic acid
- Ethanoic acid to ethanoic anhydride.
> Give chemical test for primary amines? (2018 AHSEC)
> What happen when aniline react with bromine water at room temperature? (2018 AHSEC)
> Write the diazotization reaction of aniline? (2018 AHSEC)
> What is denaturation of protein? (2018 AHSEC)
> Carbohydrate is boiled with dilute sulfuric acid in alcoholic solution to form two hexose with the same chemical formula. identify the Carbohydrate and the to hexoses. give necessary chemical equations. (2018 AHSEC)
> Give an example of homeo polymer and one example of copolymer. (2018 AHSEC)
> Mention the structural difference between thermoplastic polymer and thermosetting polymer. (2018 AHSEC)
> Give one use of high-density polymer. (2018 AHSEC)
> Define standard electrode potential. (2018 AHSEC)
> Answer any five of the following: (2018 AHSEC)
- explain why nitrogen dimerises
- why is water a liquid and Hydrogen sulphide gas at normal temperature?
- what happens when potassium chloride is heated with magnesium dioxide?
- what is Oleum?
- Lauren exhibits only -1 Oxidation State where is other halogens also exhibit +1, +3, +5 and +7 Oxidation State. Explain
- silver atom has completely filled D orbitals in its ground state yet it is considered as Transition Element. Why?
- copper positive ion is not stable in aqueous solution. explain.
- actinoid contraction is Greater from element to element than lanthanoid contraction. Why?
> Which of the First-row transition metal exhibit + 7 Oxidation State? (2018 AHSEC)
> How would you account for irregular variation of first and second ionization enthalpy in the first
series of Transition Elements? (2018 AHSEC)
> What are interstitial compounds? (2018 AHSEC)
> Give two uses of potassium permanganate. (2018 AHSEC)
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