Reference no: EM131877980
Section A
Q1] Select & write the appropriate answer from the given alternatives.
1) In Rutherford's experiment most of the alpha particles were _________.
a) passed undeflected b) deflected c) thrown back d) absorbed.
2) Na2CO3 is a salt of _________.
a) strong acid & strong base b) strong acid & weak base
c) weak acid & strong base d) weak acid & weak base
3) Milk is ________.
a) An emulsion b) a gel c) a sol d) an aerosol
4) The sum of oxidation states of all atoms in ClO4- is __________.
a) Zero b) -4 c) -1 d) +2
5) The liquid with maximum viscosity is __________.
a) Water b) acetone c) glycol d) glass
6) Molecule is the smallest particle of ___________.
a) compound b) substance c) mixture d) element
7) Total number of sigma bonds involved in ethylene molecule are _________.
a) 3 b) 5 c) 2 d) 1
Q2) Answer the following
1) Distinguish between sigma & pi bond.
2) What are the characteristics of adsorption?
3) Explain following terms:
a) Tyndall Effect b) Reduction
4) Find the oxidation number to the underlined element in the following compound or ions.
a) NaBH4 b) K2Cr2O7
5) Explain : a) Pauli's exclusion principle b) Hydrogen-bonding
6) State Boyle's law & Charles' law
7) Distinguish between Physisorption & Chemisorption.
Q3) Answer the following
1) Derive the ideal gas equation.
2) Explain
a) Second ionization enthalpy is greater than first ionization enthalpy.
b) Fluorine has less negative electron gain enthalpy than chlorine.
3) Explain the following applications of redox reactions:
a) In metallurgy b) in batteries c) bleaching
4) Derive Ostwald's dilution law for weak acid CH3COOH.
Q4 a) Define : a) degree of dissociation. b) adsorbate
b) Explain electrophoresis & give its applications.
c) What are limiting & excess reactant?
OR
Q4
a) Describe Rutherford's scattering experiment of alpha-particles.
d) State Le-Chatelier's principle. How does it explain the effect of change in concentration on the composition of equilibrium mixture?
e) Give characteristics of gaseous state.
Section B
Q1] Select & write the appropriate answer from the given alternatives.
1) Aromatic compounds burns with _________.
a) Blue flame b) green flame c) red flame d) sooty flame
2) Which one of the following compound is an example of alkynes?
a) C3H8 b) C3H6 c) C3H4 d) C4H8
3) Hex-1-ene reacts with HBr in prescence of H2O2 to give _______.
a) 1-bromohexane b) 2-bromohexane c) 1,2-dibromohexane d) 2,3-dibromohexane
4) Which of the following is aliphatic saturated hydrocarbon?
a) C6H6 b) C6H10 c) C6H12 d) C4H14
5) Resonance is not exhibited by _____________.
a) Phenol b) aniline c) nitrobenzene d) cyclohexane
6) Dry ice is _________.
a) Solid CO2 b) Solid SO2 c) Solid Br2 d) Solid CO
7) Number of neutrons in the nucleus of tritium (3H1) is_________.
a) 1 b) 2 c) 3 d) 4
Q2) Answer the following
1) Give any 4 uses of hydrogen.
2) Explain the role of Ca in biological system.
3) Explain:
a) Graphite is used as a lubricant.
b) Aluminium alloys are used to make aircraft body.
4) Write a note on Inductive effect.
5) How will you convert ethyl chloride into following
a) Ethane b) n-butane (write the reactions only).
6) Write a note on Markownikoff's reaction. Explain with the help of reaction.
7) Distinguish between aliphatic & aromatic compounds.
Q3) Answer the following
1) Draw following structure.
a) 2,4,6-trinitrotoluene b) 1-chloro-2,4-dinitrobenzene c) 5-methylhept-3-yne
2) Mention goals of environmental chemistry.
3) Explain anomalous property of boron.
4) What are the advantages of hydrogen as a fuel?
Q4) a) What is a soil pollution?
b) How is benzene prepared from a) phenol b) acetylene
c) Give name of following compounds
1) CH3-CH=CH-CH2CH3 2) 3)
OR
Q4) a) Complete the following reactions
1) Benzene + CH3-CH2-Cl + AlCl3 ---------------- ?
2) CH3-CH=CH2 + HBr -------------- ?
3) CH≡CH + HCl + HgCl2 ---------------- ?
b) Write the structure of aldehyde that are obtained on ozonolysis of
1) But-1-ene 2) but-2-ene
c) Explain: PbX2 is more stable than PbX4.