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11th Class Chemistry Guess Paper 2023 PDF (Download App For 1st year Chemistry Guess Papers)
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1st Year Chemistry Guess Papers 2023
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11th CLASS GUESS PAPER. 2023
CHAPTER NO. 1 BASIC CONCEPT
- What ae monoisotopic elements? Give name and symbol of such an element.
- Calculate gram atom. In 0.1 gm of sodium (at mass of sodium =23)?
- Differentiate between actual yield and theoretical yield.
- Why theoretical yield of a chemical reaction is greater than the actual yield.
- How is the efficiency of a reaction expressed?
- 23 g of sodium and 238 g of uranium have equal number of atoms in them.
- No individual Neon atom in the sample of the element has a mass of 20.18 amu why?
- Write detailed note on. i) Avogadro’s number ii) Molar volume.
- Define stoichiometry. Give its assumptions. Mention two important laws which help to perform the stoichiometric calculation.
- What is a limiting reactant? How does it control the quantity of the product formed.
- Define yield. How do we calculate the percentage yield of chemical reaction? Also mention the factors which are responsible for low yield of products.
CHAPTER NO. 2 EXPERIMENTAL TECHNIQUES INCHEMISTRY.
- State distribution law.
- What do you mean by solvent extraction? Which law controls it?
- Differentiate between stationary and mobile phase used in chromatography.
- Write down the uses of chromatography.
- What is chromatography and R1 value?
- Write down the main characteristics of a solvent selected for crystallization of. Of a compound.
- Why is there a need to crystallize the crude product?
CHAPTER NO. 3 GASES.
- Explain the plot of PV versus P is a straight line at constant temperature and with a fixed number of moles of an ideal gas.
- Write expression for kinetic equation and root mean square velocity of gases.
- Why pilots feel uncomfortable berating in unpressurised cabin?
- Derive Boyle’s law from KMT.
- Write two uses of plasma.
- What is Kinetic molecular theory of gases? Give its postulates.
- State and explain Boyle’s law and verify this law by an experiment.
CHAPTER NO. 4 LIQUIDS AND SOLIDS.
- What are dipole-dipole forces of attraction? Explain with an example.
- What are Debye forces? Explain.
- What are dipole-induced dipole forces?
- Define polarizability. How it effects London dispersion forces?
- How soaps and detergents do their cleansing action?
- Why water is liquid at room temperature but H2S and H2Se are gases, comments.
- Give reason for the lowest boiling point of hydride of group IV-A elements.
- What are ionic solids? Give their properties.
- What are molecular crystals? Give their properties.
CHAPTER NO. 6 CHEMICAL BONDING.
- Define ionic and covalent radii.
- Define covalent radius with an example.
- Why cationic radius is smaller than parent atom?
- Ionization energy is index to the metallic character. Why?
- How does electron affinity very in periodic table?
- Why polar bond is stronger than non-polar bonds?
- Why the lone pair electrons repel strongly than the bond pair of electrons?
- What is a chemical bond? Discuss the formation of ionic and covalent bonds.
- Define bond energy. Explain the various parameters which determine its strength.
CHAPTER NO. 7 THERMOCHEMISTRY
- Define ‘system” and “surroundings”.
- Define heat of solution. Give example.
- Define standard enthalpy of combustion. Give one example.
- What is standard enthalpy of solution?
- Define and explain Hess’s law of constant heat summation with examples.
- Describe bomb-calorimeter method for determination of enthalpy of reaction.
CHAPTER NO. 8 CHEMICAL EQULIBRIUM.
- What are irreversible reactions? Give one example.
- How does a catalyst affect a reversible reaction?
- What condition are required for the best possible yield of SO2?
- What is the effect of common ion on solubility?
- What is acidic buffer? Give one example.
- Write down Henderson’s equation and for which purpose it used.
- Explain the term Buffer capacity.
- What is the percentage ionization of acetic acid in a solution in which 0.1 moles of it has been dissolved per dm2 of solution Ka for CH3COOH = 1.85 x 105
CHAPTER NO. 9 SOLUTIONS
- Difference between ideal and non- ideal.
- Boiling points of liquids are increased when a solute is added to them. Justify it.
- What are the names of major parts of apparatus used in Landsbergis’s method for elevation of Boiling point?
- What are colligative properties? And why they are called so.
- State different from of Roault’s Law. How this law can help us to understand the ideality of a solution.
- Define solubility curve. Explain different types of solubility curves with the help of graphs.
- Describe one method to determine the boiling point of elevation of solutes.
- Describe Landeberger’s method for the measurement of boiling point elevation.
CHAPTER NO. 10 ELECTRO CHEMISTRY
- Calculate oxidation number of chromium in the following compounds.
- CrCl2 (ii) K2CrO4
- Define oxidation number and calculate the oxidation state of underlined element.
- H2PO4 ii) Ca(ClO3)2
- What is ionization and electrolysis?
- What is Anodized Aluminum?
- What is ionization and electrolys?
- Difference between primary and secondary cell giving one example each.
- What is electrode potential?
- State rules for assigning oxidation number of element with example.
- What is electrolysis? Discuss the electrolysis of fused salt PbBr.
- Write construction and working of voltaic cell.
CHAPTER NO. 11. REACTION KINETICS
- What is rate of reaction, also give name of four physical methods used to determine the rate of reaction?
- What is meant by order of reaction? Give an example.
- What is meant by half-life period? Give one example.
- The radioactive decay is always a first order reaction.
- What do you mean by Activation complex of a reaction?
- What are enzymes? Mention the characteristics of enzyme catalysis.
- How does Arrhenius equation help us to calculate the energy of activation of a reaction?