Amongst the following statements, that which was not proposed by Dalton was:
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Amongst the following statements, that which was not proposed by Dalton was:
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The number of orbitals associated with quantum numbers $$n = 5$$, $$m_s = +\frac{1}{2}$$ is:
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The electron gain enthalpy (in kJ/mol) of fluorine, chlorine, bromine and iodine, respectively, are
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The dipole moments of CCl$$_4$$, CHCl$$_3$$ and CH$$_4$$ are in the order
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The relative strength of the interionic/ intermolecular forces in a decreasing order is:
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Oxidation number of potassium in K$$_2$$O, K$$_2$$O$$_2$$ and KO$$_2$$, respectively, is:
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In comparison to the zeolite process for the removal of permanent hardness, the synthetic resin method is
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A solution of m-chloroaniline, m-chlorophenol and m-chlorobenzoic acid in ethyl acetate was extracted initially with a saturated solution of NaHCO$$_3$$ to give fraction A. The left over organic phase was extracted with dilute NaOH solution to give fraction B. The final organic layer was labelled as fraction C. Fractions A, B and C, contain respectively:
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The increasing order of pK$$_b$$ for the following compounds will be:
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Consider the following reactions:
(a) $$(CH_3)_3CCH(OH)CH_3 \xrightarrow{\text{conc.} H_2SO_4}$$
(b) $$(CH_3)_2CHCH(Br)CH_3 \xrightarrow{\text{alc. KOH}}$$
(c) $$(CH_3)_2CHCH(Br)CH_3 \xrightarrow{(CH_3)_3O^\ominus K^\oplus}$$
(d)
Which of the reaction(s) will not produce Saytzeff product?
At 35 $$^\circ$$C, the vapour pressure of CS$$_2$$ is 512 mmHg and that of acetone is 144 mmHg. A solution of CS$$_2$$ in acetone has a total vapour pressure of 600 mmHg. The false statement amongst the following is:
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Given that the standard potentials (E$$^\circ$$) of Cu$$^{2+}$$/Cu and Cu$$^+$$/Cu are 0.34V and 0.522V respectively, the E$$^\circ$$ of Cu$$^{2+}$$/Cu$$^+$$ is:
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The purest form of commercial iron is:
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The atomic radius of Ag is closest to
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The IUPAC name of the complex [Pt(NH$$_3$$)$$_2$$Cl(NH$$_2$$CH$$_3$$)]Cl is
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The theory that can completely/properly explain the nature of bonding in [Ni(CO)$$_4$$] is:
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1-methyl ethylene oxide when treated with an excess of HBr produces
What is the product of the following reaction?
Consider the following reaction:
The product 'X' is used:
Match the following:
(i) Riboflavin (a) Beriberi
(ii) Thiamine (b) Scurvy
(iii) Pyridoxine (c) Cheilosis
(iv) Ascorbic acid (d) Convulsions
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For the reaction:
A(l) $$\rightarrow$$ 2B(g)
$$\Delta U = 2.1$$ kcal, $$\Delta S = 20$$ cal K$$^{-1}$$ at 300K.
Hence $$\Delta G$$ in kcal is
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Two solutions, A and B, each of 100L was made by dissolving 4g of NaOH and 9.8g of H$$_2$$SO$$_4$$ in water, respectively. The pH of the resultant solution obtained from mixing 40L of solution A and 10L of solution B is (log 2 = 0.3)
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During the nuclear explosion, one of the products is $$^{90}$$Sr with half life of 6.93 years. If 1$$\mu$$g of $$^{90}$$Sr was absorbed in the bones of a newly born baby in place of Ca, how much time, in years, is required to reduce it by 90% if it is not lost metabolically
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Chlorine reacts with hot and concentrated NaOH and produces compounds (X) and (Y). Compound (X) gives white precipitate with silver nitrate solution. The average bond order between Cl and O atoms in (Y) is
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The number of chiral carbons in chloramphenicol is
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