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- As per IUPAC nomenclature, the name of the complex [Co (H2O)4(NH3 )2]C13 is correct option is d) diamminetctraaquacobalt (III) chloride First of all, the compound has complex positive part [Co(H₂O)₄(NH₃)₂]₃₊ therefor... 1
- The oxidation state of Fe in the brown ring complex [Fe(H2O)5NO]SO4 is:(a) + 1 (b) + 2 (c) + 3 (d) + 4 Corret option is a) +1 Explaination :: [Fe(H₂O)₅NO]SO_(4 → ([Fe(H₂O)₅NO] )⁺²+(SO₄)⁻² ) (fe^+)⁺¹ =+2 charge on fe= +1 1
- The number of enantiomer in a glucose molecule is (a) 16 (b) 12 (c) 4 (d) 9 Correct option is A) 16 Explaination: Glucose molecule the number of chiral carbon is = 4 Formula for enantiomer, = 2ⁿ total number of enant... 1
- Find out the number of enantiomer, meso isomer and total number of optical isomers for the following compound Correct option is C) 4,0,4 explaination : Number of enantiomer = 2n (n is the number of chiral carbon ) Number of meso isomer = 0 Total numb... 1
- Select the correct stability order of the conformation /Rotamers/ Rotational isomers of Ethane Molecule The correct answer is c) Anti-staggered > Skew or Gouche > Partially Eclipsed > Fully Eclipsed EXplaination :: The isomers which can be prod... 1
- According to molecular orbital theory, the species among the following that does not exist is: The correct answer is d) Be₂ According to M.O.T. If bond order of chemical species is zero then that chemical species does not exist Chemica... 1
- In Freundlich adsorption isotherm at moderate pressure, the extent of adsorption (x/m) is directly proportional to Px. The value of x is: The correct answer is d) 1/n Solution : (xover m)=KP^(1over n) x=1over n 1
- Ceric ammonium nitrate and CHCl3/alc. KOH are used for the identification of functional groups The correct answer is option A) Alcohol and amine Solution : Ceric ammonium nitrate and CHCl₃/alc. KOH are used for the identification of fu... 1
- Calgon is used for water treatment. Which of the following statements is NOT true about Calgon? The correct answer is opion A) Calgon contains the 2ⁿd most abundant element by weight in the earth's crust EXplaination :: Order of abundan... 1
- The nature of charge on resulting colloidal particles when FeCl3 is added to excess of hot water is: The correct option is A) positive Explaination :: A positively charged sol of hydrated ferric oxide is formed due to the adsorption of Fe³⁺... 1
- For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements: The correct answer is b) (I), (II) and (III) only {answer by NTA} Explaination :: 1
- An open beaker of water in quilibrium with water vapour is in a sealed container. When a few grams of glucose Answer: (1) the rate at which water molecules leave the solution decreases At equilibrium, the rate of evaporation (water molecules leaving... 1
- Ammonolysis of alkyl halide to prepare primary, secondary and tertiary amines followed by NaOH is The correct answer is option 1 to remove acidic impurities 2
- How many chain isomers are possible in C5H12 , answer 3 isomers are possible explaination:: Pentane (C₅H₁₂)is an organic compound with five carbon atoms. Pentane has three structural isomers tha... 1
- The empirical formula of a gaseous compound is CH2 .The density of the compound is 1.25 gm/lit.at S.T.P. The correct option is A) C₂H_(4 ) _(explaination: ) _(Since, 1 lite contains 1.25 gms. Hence 22.4 litres contain(1.25×22.4)gms≡28gms. So mol... 1
- 1 gram of a carbonate (M2CO3) on treatment with excess HCl produces 0.01186 mole of CO2, The molar mass of M2CO3 in g mol-1 is Ans:- 84.3 g/mole 4) is correct option The equation for the above reaction is as follows:- M2CO3 + 2HCl-> 2MCl+CO2+2H2O This shows that , 1... 1
- Select the correct stability order of the conformation /Rotamers/ Rotational isomers of Ethane Molecule The correct answer is (c) solution:: The isomers which can be produced by the free rotation about single bond are known as conformation /Rot... 1
- The correct pair of the ambident nucleophiles is are: The correct answer is 3) A and C only Explaination : Ambident nucleophile means in a nucleophile more than one electron donor atom. Eg in NO... 2
- One of the byproduct formed during the recovery of NH3 from solvay process :- The correct answer is C) CaCl₂ Explanation::- This process is also termed as ammonia recovery . The calcium hydroxide is reacted with the am... 1
- The set that represents the Pair of neutral oxide of nitrogen Correct answer is C) NO and N₂O Explanation :: Neutral oxides are those oxides which show neither basic nor acidic properties when they reac... 1