1. In the structure of diamond, carbon atoms appear at
a) 0,0,0 and $\frac{1}{2}, \frac{1}{2}, \frac{1}{2}$
b) $\frac{1}{4}, \frac{1}{4}, \frac{1}{4}$ and $\frac{1}{2}, \frac{1}{2}, \frac{1}{2}$
c) 0,0,0 and $\frac{1}{4}, \frac{1}{4}, \frac{1}{4}$
d) 0,0,0 and $\frac{3}{4}, \frac{3}{4}, \frac{3}{4}$

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2. Schottky defect to crystals is observed when
a) Unequal number of cations and anions are missing from the lattice
b) Equal number of cations and anions are missing from the lattice
c) An ion leaves its normal site and occupies an interstitial site
d) Density of the crystal is increased

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1. The osmotic pressure of blood is 7.40 atm at 27⁰C. The number of mol of glucose to be used per litre for an intravenous inhjection that is to have the same osmotic pressure as blood is
a) 0.3
b) 0.2
c) 0.1
d) 0.4

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2. Which one of the following salts will have the same value of vant Hoff factor (i) as that of K₄[Fe(CN)₆]?
a) Al₂(SO₄)₃
b) NaCl
c) Al(NO₃)₃
d) Na₂SO₄

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1. For an electrolyte solution of 0.05 mol L^-1 , the conductivity has been found to be 0.0110S cm^-1. The molar conductivity is
a) 0.055 S cm² mol^-1
b) 550 S cm^-1
c) 0.22 S cm² mol^-1
d) 220 S cm² mol^-1

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2. The highest electrical conductivity of the following aqueous solutions is of
a) 0.1 M acetic acid
b) 0.1 M chloro acetic acid
c) 0.1 M fluoro acetic acid
d) 0.1 M difluoro acetic acid

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1. Burning of coal is represented as C(s) + O₂(g) → CO₂(g)
The rate of this reaction is increased by
a) Decrease in the concentration of oxygen
b) Powdering the lumps of coal
c) Decreasing the temperature of coal
d) Providing inert atmosphere

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2. For a zero order reaction, the plot of concentration, vs time is linear with
a) +ve slope and zero intercept
b) -ve slope and zero intercept
c) +ve slope and non-zero intercept
d) -ve slope and non-zero intercept

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1. The process of passing of a precipitate into colloidal solution on adding an electrolyte is called
a) Dialysis
b) Peptization
c) Electrophoresis
d) Electro-osmosis

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2. Which of the following statements is incorrect regarding physisorption?
a) It occurs because of van der waals forces
b) Liquefiable gases are adsorbed more easily
c) Under high pressure it results surface
d) Enthalpy of adsorption (ΔH_adsorption) is low and positive

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1. Rutile is an ore of
a) Ti
b) Mn
c) Ca
d) Mg

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2. Which of the following reactions taking place in the blast furnace during extraction of iron is endothermic?
a) CaCO₃ $\rightarrow$ CaO + CO₂
b) 2C + O₂ $\rightarrow$ 2CO
c) C + O₂ $\rightarrow$ CO₂
d) Fe₂O₃ + 3CO $\rightarrow$ 2Fe + 3CO₂

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1. When zinc reacts with very dilete nitric acid it produces
a) NO
b) NH₄NO₃
c) NO2
d) H₂

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2. In vapour state Cu(NO₃)₂ and Cu₂(CH₃COO)₄.2H₂O exist as
a) Dimer, monomer
b) Monomer, dimer
c) Monomer, monomer
d) Dimer, Dimer

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1. The closed ring compounds formed by bisdentate ligands, on binding to a metal or metal ions are called:
a) Monodentate ligand
b) Chelates
c) Ambidentate
d) None of these

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2. Coordination number Cu²⁺ in CuSO₄.5H₂O is
a) 5
b) 4
c) 3
d) 2

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1. In the following compounds,

the order of acidity is:
a) III > IV > I > II
b) I > IV > III > II
c) II > I > III > IV
d) IV > III > I > II

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2. The presence of peroxides in old samples of ether is detected by shaking them with a freshly prepared solution of Fe²⁺ (FeSO₄) followed by the addition of KCNS. The appearance of ……..colour indicates the presence of peroxides.
a) Blue
b) Green
c) Red
d) Brown

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1. The compound formed when malonic acid is heated with urea , is
a) cinnamic acid
b) butyric acid
c) barbituric acid
d) crotonic acid

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2. Consider the following transformations
$CH_{3}COOH \overset{CaCO_{3}}{\rightarrow} A \overset{heat}{\rightarrow} B \xrightarrow[NAOH]{I_{2}}$
The molecular formula of C is
a)
b)
c) CHI₃
d) CH₃I

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1. Cellulose is a straight-chain polysaccharide composed of only:
a) D-Glucose units joined by α-glycosidic linkage.
b) D-Glucose units joined by β-glycoisdic linkage.
c) D-Galactose units joined by α-glycosidic linkage.
d) D-Galactose units joined by β-glycosidic linkage.

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2. The correct statement in respect of protein haemoglobin is that it
a) functions as a catalyst for biological reactions.
b) maintains blood sugar level.
c) acts as an oxygen carrier in the blood.
d) forms antibodies and offers resistance to diseases.

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1. Radioactive disintegration differs from a chemical change in being
a) An exothermic change
b) A spontaneous process
c) A nuclear process
d) A unimolecular first-order reaction

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2. One curie of activity is equivalent to
a) 3.7 x 10⁷ disintegrations per second
b) 3.7 x 10¹⁰ disintegrations per second
c) 3.7 x 10⁴ disintegrations per second
d) None

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1. About H₂SO₄, which of the following statements is incorrect?
a) It acts as a reducing agent
b) It acts as an oxidising agent
c) It acts as dehydrating agent
d) It is highly viscous

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2. When SO₂ is passed through a solution of H₂S in water:
a) Sulphuric acid is formed
b) A clear solution is formed
c) Sulphur is precipitated
d) No change is observed

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1. The oxidising ability of perhal;ates are in the order:
a) ClO₄^⊝ > BrO₄^⊝ > IO₄^⊝
b) ClO₄^⊝ < BrO₄^⊝ < IO₄^⊝
c) BrO₄^⊝ > IO₄^⊝ > ClO₄^⊝
d) IO₄^⊝ < BrO₄^⊝ < ClO₄^⊝

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2. IE of halogens are
a) F > Cl > Br > I
b) Cl > F > Br > I
c) Cl > Br > I > F
d) Cl > Br > F > I

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1. Helium is used in gas balloons instead of hydrogen because
a) it is higher than H₂
b) it is non-combustible
c) it is more abundant than H₂
d) its linkage can be detected easily

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2. Which of the following cannot be formed?
a) He²⁺
b) He^⊕
c) He
d) He₂

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1. MeMgBr + Product. The product is:
a)
b)
c)
d)

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2. When ethane nitrile is treated with C₂H₅MgBr, followed by hydrolysis, the product is:
a)
b)
c)
d)

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1.
The product (A) is:
a) Me-$\equiv$-CHO
b)
c)
d)

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2.
The product (A) is:
a)
b)
c)
d)

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1. Which of the following cannot be used for the preparation of iodoform?
a) Acetone
b) Methanol
c) Ethanol
d) Acetaldehyde

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2. Which of the following is most easily cleaved by HBr.
a)
b)
c)
d)

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1. Which reagent can distinguish between pentanoic acid and pentanamide?
a) Cold dil. NaOH
b) Cold dil. NaHCO₃
c) Cold conc. H₂SO₄
d) All

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2.
Product (C ) is :
a)
b)
c) Both (a) and (b)
d) None

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1. Which of the following substances on treatment with P₂O₅ gives ethanenitrile?
a) Propanamide
b) Ethanamide
c) Ethanoic acid
d) N-Methylethyl amine

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2. Which of the following is the weakest base?
a) (CH₃)₂NH
b) (CH₃)₃N
c) C₆H₅NH₂
d) C₆H₅NHCH₃

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1. Which of the following represents the example of a homopolymer?
a) PMMA
b) Bakelite
c) Glyptal
d) Neoprene

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2. The formation of polyethylene from calcium carbide takes place as follows:
CaC₂ + 2H₂O → Ca(OH)₂ + C₂H₂
C₂H₂+H₂ → C₂H₄

The amount of polyethylene obtained from 64 kg of CaC₂ is:
a) 14 kg
b) 7 kg
c) 21 kg
d) 28 kg

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1. Catalytic oxidation of NH₃ (passing a mixture of NH₃ and air over heated Pt gauge) gives
a) NO
b) N₂O
c) N₂O₃
d) N₂O₅

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2. Among the following the strongest acid is
a) H₃PO2
b) H₃PO₃
c) H₃PO₄
d) H₄P₂O₇

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