Instruction :-
- All questions are compulsory to attempt.
- Q. No. 1 to 5 are objective type questions allotted marks 28.
- Q. No. 6 to 12 are very short answer type questions, each question carries 2 marks. (Word limit 30)
- Q. No. 13 to 16 are short answer type questions, each question carries 3 marks. (Word limit 75)
- Q. No. 17 to 20 are long answer type questions, each question carries 4 marks. (Word limit 120)
- Q. No. 6 to 20 has internal options
Q.1 Choose the correct option.
(i) Mixture of copper and zinc is example of –
(a) Liquid-solid solution (b) Solid-solid solution
(c) Gas-liquid solution (d) Gas-solid solution
(ii) Weak electrolyte is-
(a) Sodium hydroxide (b) sodium chloride
(c) sulphuric acid (d) Acetic acid
(iii) Elements or ion which contains unpaired electrons-
(a) Paramagnetic (b) Diamagnetic
(c) Ferromagnetic (d) Anti ferromagnetic
(iv) Chemical formula of Chloroform is-
i. CH2Cl2 ii. CHCl3 iii. CH3Cl iv. CCl4
(v) Hybridized state of carbonyl carbon >c=o
i sp ii sp2 iii. sp3 iv. sp3d
(vi) Nature of zwitter ion is-
(a) Acidic (b) Alkaline (c) Neutral (d) Amphoteric
2 Fill in the blanks-
(i) Primary cells are cells.——————
(ii) The period or time in which a reactant remains half of its original quantity is
called . ——————————————-
(iii) Number of electrons in 3d orbital of a valence shell of group 11element is ———–
(iv) Chemical Formula of carbolic acid is .——————————————————–
(v) Hoffman Bromamide reaction is used in the of organic compound series.———
(vi) __ bond is formed during the formation of disaccharide from monosaccharide.
Q. 3 Write true/false.
(i) 1.0 ppm quantity of fluoride ion present in water prevents the tooth
decay.
(ii) Electrochemistry is the fundamental basis of sensory indicators among cells.
(iii) Zn, Cd, Hg are transition elements.
(iv) Inversion of orientation occurs in uni-molecular nucleophillic substitutions.
(v) Carbonyl compounds are composition of textile, fragrances, plastics
and medicines.
(vi) Ketone functional group is present in fructose.
Q.4 Match the following –
A B
(i) Insulator – (a) Activation energy
(ii) Catalyst – (b) Ethyl alcohol
(iii) Chelate – (c) Glass
(iv) Molasses – (d) Amino Acid
(v) Protein – (e) Cyclic structure
Q 5 . Write answer in one word/sentence.
(i) Express mole function by formula.
(ii) Write one example of zero order reaction.
(iii) Write co-ordination number of Zn in Zn(CO)4
(iv) Complete –
H H2O
R – C = N ———– —- R – CH = NH ……..————
(Reduction) H+
(v) Write chemical formula of Hinsberg Reagent
Q.6 Write the definition of oxidation with one example
Or
Write the definition of reduction with one example.
Q.7 Write electronic configuration of Cr-24.
Or
Write only chemical equation to obtain potassium dichromate from sodium Dichromate
Q.8 Why Zn is not considered as transition element in 3d- transition series.
Or
Why transition elements are good catalysts?
Q.9 What are Chelete complex? Write one example
Or
What are Heteroleptic complex? Write one example.
Q.10 Write the formula of main product A and B in following chemical reaction
PCl5 H2
C6H5-COOH————————→ A————————————————-→ B.
Pb-BaSo4
Or
Write only chemical equation of silver mirror test of Aldehyde
Q.11 Write the chemical equation of reaction to obtain primary amine from acid amide, caustic potash and alcoholic bromine liquid.
Or
Write the chemical equation of carbyl amine reaction to test primary amine.
Q.12 What happens when Aniline reacts with bromine water at room temperature .
Or
What happens when benzene diazonium chloride reacts with Aniline in presence of acid? (Write only chemical equation)
Q.13 Write the faraday’s first law of electrolysis and mathematical expression.
Or
Write the Kohlroach law of ion and its formula.
Q.14 Write IUPAC name of following complex compound-
(i) [Ni(NH3)6]Cl2 (ii) Zn (CO)4 (iii) K3[Fe(CN)6]
Or
Write the chemical formula of following compounds-
(i) Tetra carbolyl nickel (0).
(ii)Potasium tetra hydroxidozincate(II)
(iii) Hexaamine cobalt (III) chloride.
Q.15 What happenes when. (Write only equation)
(i) Propane react with CH3-Mg-Br and then hydrolyzed.
(ii) Formaldehyde undergoes cannizaro reaction
(iii) Ethyl alcohol react with acetic acid in presence of conc.H2SO4
Or
Complete and write the chemical equation-
NaOH&𝐶𝑎𝑂
i. R-COONa —————————————– → + ——————————-
Δ
ii CH3-COOH + NH3 ⇌ ————→ ——————————
iii . R-COOH + SOCl2 →……….. + …………+ SO2
Q.16 What is the role of vitamins in human body? Classify the vitamins on basis
of solubility
Or
Write the full name, position in cell and one main function of DNA.
Q.17 Solve the following questions.
(a) Establish mathematical expression of Roult’s law for a binary solution
(b) Vapour pressure of chloroform (CHCl3 ) and dichloromethane (CH2Cl2 ) at 298
K are 200 mm Hg and 415 mm Hg respectively. Calculate the vapour pressure of
the solution prepared by mixing 25.5 g of CHCl3 and 40 g of CH2Cl2 at 298 K
Or
For a solution –
(a) Define the formula for relative lowering in vapour pressure of a solution.
(b) Vapour pressure of benzene in 0.850 bar at a temperature. 0.5g nonvolatile
non- electrolyte solute is dissolved in 39.0g of benzene (molecular mass 78g mol-1)
Vapors pressure of solution is 0.845 bar. Calculate the molecular mass of solute.
Q. 18 Answer the following questions.
(a) Define order of reaction.
(b) For first order of reaction prove that rate of reactions, is directly proportional to
the concentration of reactant.
Or
Answer the following questions.
(a) What is half-life of a reactant?
(b) For zero order reaction prove that half-life period 𝑡1/2
is directly Proportional of
initial concentration of reactant and inversely proportional of rate constant.
Q.19 Write any two characteristics and chemical equation of reaction mechanism of
(CH3)3 CBr + OH- ————– → (CH3)3COH + Br
Or
Write Sandmayer Reaction and Wurtz Fitting reaction with chemical equation.
Q.20 Answer the following questions.
(a) What is Lucas Reagent?
(b) Differentiate primary secondary and tertiary alcohol on basis of Lucas reagent.
Or
Answer the following questions.
How will you obtain following starting from phenol-
(a) Picric acid
(b) 2,4,6 tribromophenol
(c) Salicyldehyde
(d) Benzene