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In which one of the hydrated crystals, water molecules present in the interstitial spaces? (a) BaCl2. 2H2O (b) [Cu(H2O)2 (NH3)2] Cl2 (c)CuSO4. 5H2O (d) [Cr(H2O)5]3+ . 3Cl-

Solution: (a) BaCl2. 2H2O Interstitial water molecules found in BaCl2. 2H2O salt. There are two interstitial water present in barium chloride... View Article

The amine ‘A’ when treated with nitrous acid gives yellow oily substance. The amine A is : (a) triethylamine (b) trimethylamine (c) aniline (d) methylphenylamine

Solution: (d) Methylphenylamine Primary amines react with HNO2 evolved nitrogen Gas and from a Clear Solution Secondary amines react with HNO2... View Article

Choose the correct answer among the alternatives given, One mole of ethyl acetate on treatment with an excess of LiAlH4 in dry ether and subsequent acidification produces: (a) 1 mol of acetic acid + 1 mol of ethyl alcohol (b) 1 mol of ethyl alcohol + 1 mole of methyl alcohol (c) 2 mol of ethyl alcohol (d) 1 mol of 2-butanol

Solution: (c) Ethyl Acetate on treatment with LiAlH4 under go reductions gives 2 moles of ethyl alcohol.... View Article

If ‘n’ represents total number of asymmetric carbon atoms in a compound, the possible number of optical isomers of the compound is

Solution: Stereoisomers are compounds with the same chemical formula but different spatial arrangement. An asymmetric carbon atom (chiral... View Article

CH3CHO and C6H5CH2CHO can be distinguished chemically by : (a) Benedict test (b) Iodoform test (c) Tollen’s reagent test (d) Fehling solution test

Solution: (B) CH3CHO and C6H5CH2CHO both are adehyde so they can give the test of Tollen's reagent, Fehlings solution and Benedict's solution.... View Article

The IUPAC name of CH3OC2H5 is: (a) Ethoxy methane (b) Methoxy ethane (c) Ethyl methyl ether (d) Methyl ethyl ether

Solution (b) The ethernal oxygen is taken with a smaller alkyl group and forms a part of the alkoxy group (substituent) while the larger alkyl... View Article

Thomas slag is: (a) CaSiO3 (b) Ca3(PO4)2 (c) MnSiO3 (d) CaCO3 (e) none of the above

Solution: (E) none of the above Thomas slag is tetracalcium phosphate Ca4(PO4)2O. It has Ca/P ratio of 2. It was used as... View Article

Iodoform test is not given by:(a) 2-Pentanone (b) Ethanol (c) Ethanal (d) 3-pentanone

Solution:(d) 3-pentanone Iodoform test: Iodoform test is used to check the presence of carbonyl compounds with the structure R-CO-CH3 or... View Article

Benzene react with CH3CH2CH2Cl in presence of AlCl3 produces

Solution: Benzene undergo Fredel Carft alkylation reaction at room temperature with a chloroalkane (chloropropane) in the presence of aluminium... View Article

Bell metal contains 80% copper. The mass of Bell metal which contains 1.5×10^20 atoms of copper is (Cu=64)

Solution: The bell metal contains 80% copper. 100 gm of bell metal contains 80 gm of copper. Molecular mass of copper = 64 gm/mol 1 mole of... View Article

125 mL of 63% (w/v) H2C2O4 ⋅2H2O solution is made to react with 125 mL of a 40%(w/v) NaOH solution. The resulting solution is: (a) Neutral (b) Acidic (c) Strongly acidic (d) Alkaline

Solution: (a) Given 125 mL of 63% (w/v) H2C2O4 ⋅2H2O solution. Concentration (Normality )of H2C2O4 ⋅2H2O is N = (w/eq.W ) x 1000/v(ml) Weight... View Article

The major binding force of diamond, silicon and quartz is (a) Electrostatic force (b) Electrical attraction (c) Covalent bond force (d) Non covalent force (e) Van der Waals forces

Solution (c) The major binding force of diamond, silicon and quartz is covalent bond force. Diamond is a covalent solid. It is a big giant... View Article

The hybridization of atomic orbitals of nitrogen in NO2+, NO3− and NH4+are

Solution: Steric number = number of atom bonded + lone pair of electrons (i) Hybridisation of N in NO2+ is: In NO2+ outer most valence... View Article

A cheap, conventional, commercial and inexhaustible source of energy is: (a) Hydropower (b) Solar energy (c) Wind energy (d) Thermal energy

Solution: (a) Flowing water creates energy that can be captured and turned into electricity. This is called hydroelectric power or hydropower.... View Article

Sulphur dioxide is a/an (a) basic oxide (b) acidic oxide (c) neutral oxide (d) amphoteric oxide

Solution:(b) SO2 is acidic in nature. All non-metallic oxides are acidic in nature because they react with water to produce corresponding... View Article

The products formed in the hydrolysis of ICl are: (A) HI+HCl (B) HI+HOCl (C) HCl+HOI (D) HOCl+HOI

Solution:(c) ICl + H2O → HCl + HOI In the hydrolysis of ICl, the products are HCl + HOI. During the hydrolysis of interhalogen compounds,... View Article

Which of the following compounds would have the smallest value for pka ? (a) CHF2CH2CH2COOH (b) CH3CH2CF2COOH (c) CH2FCHFCH2COOH (d) CH3CF2CH2COOH

Solution:(b) The compounds having more acidic strength have less pKa value. −F is a strong electron withdrawing group. More number of electron... View Article

Which among the following compounds does not undergo hydrolysis? (I)TeF6 (II)SF6 (III)NCl3 (IV)NF3

(I) TeF6 is hydrolysed to form H6TeO6 TeF6 + 6H2O → 6HF + H6TeO6 (II) SF6 atom is sterically protected by six F atoms and does not allow water... View Article

Gaseous mixture of H2 and NH3 gas contains 68 mass % of NH3. The vapour density of the mixture is

Solution: We know that: vapour density =½ Mavg Mavg = total mass/ total moles mass of NH3 = 68 % = 68 gm ∴ mass of H2 =100−68= 32 gm moles... View Article

If a 6.84% (wt/vol.) solution of cane sugar (mol. wt = 342) is isotonic with 1.52% (wt/vol.) solution of thiocarbamide, then the molecular weight of thiocarbamide is

Solution: Given 6.84% (wt/vol.) solution of cane sugar means, weight of cane sugar = 6.84gm Volume = 100 ml Molecular weight of... View Article

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