6 litres of an alkene require 27 litres of oxygen at constant temperature and pressure for complete combustion. The alkene is :
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6 litres of an alkene require 27 litres of oxygen at constant temperature and pressure for complete combustion. The alkene is :
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How many grams of methyl alcohol should be added to a 10 litre tank of water to prevent its freezing at 268 K? ($$K_f$$ for water is 1.86 K kg mol$$^{-1}$$)
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10 mL of 2(M) NaOH solution is added to 200 mL of 0.5(M) of NaOH solution. What is the final concentration?
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Given (A) n = 5, $$m_l$$ = +1 (B) n = 2, $$l$$ = 1, $$m_l$$ = -1, $$m_s$$ = -1/2. The maximum number of electron(s) in an atom that can have the quantum numbers as given in (A) and (B) are respectively:
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The catenation tendency of C, Si and Ge is in the order Ge < Si < C. The bond energies (in kJ mol$$^{-1}$$) of C-C, Si-Si and Ge-Ge bonds are respectively ;
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Which one of the following cannot function as an oxidising agent?
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In which of the following sets, all the given species are isostructural?
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The internuclear distances in O-O bonds for $$O_2^+$$, $$O_2$$, $$O_2^-$$ and $$O_2^{2-}$$ respectively are :
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The structure of which of the following chloro species can be explained on the basis of dsp$$^2$$ hybridization?
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Which one of the following is the wrong assumption of kinetic theory of gases?
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In which of the following exothermic reactions, the heat liberated per mole is the highest?
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Given that: (i) $$\Delta_f H°$$ of $$N_2O$$ is 82 kJ mol$$^{-1}$$ (ii) Bond energies of $$N \equiv N$$, $$N = N$$, $$O = O$$ and $$N = O$$ are 946, 418, 498 and 607 kJ mol$$^{-1}$$ respectively. The resonance energy of $$N_2O$$ is :
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The ratio $$\frac{K_p}{K_c}$$ for the reaction $$CO(g) + \frac{1}{2}O_2(g) \rightleftharpoons CO_2(g)$$ is:
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What would be the pH of a solution obtained by mixing 5 g of acetic acid and 7.5 g of sodium acetate and making the volume equal to 500 mL? ($$K_a = 1.75 \times 10^{-5}$$, pK$$_a$$ = 4.76)
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Which one of the following arrangements represents the correct order of the proton affinity of the given species :
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Given
In the above compounds correct order of reactivity in electrophilic substitution reactions will be:
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Copper crystallises in fcc with a unit length of 361 pm. What is the radius of copper atom?
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The Gibbs energy for the decomposition of $$Al_2O_3$$ at 500°C is as follows :
$$\frac{2}{3}Al_2O_3 \rightarrow \frac{4}{3}Al + O_2$$, $$\Delta_r G = +940$$ kJ mol$$^{-1}$$
The potential difference needed for the electrolytic reduction of aluminium oxide at 500°C should be at least :
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A solution of copper sulphate (CuSO$$_4$$) is electrolysed for 10 minutes with a current of 1.5 amperes. The mass of copper deposited at the cathode (at. mass of Cu = 63u) is :
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A radioactive isotope having a half-life period of 3 days was received after 12 days. If 3 g of the isotope is left in the container, what would be the initial mass of the isotope?
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In which of the following octahedral complex species the magnitude of $$\Delta_0$$ will be maximum?
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In nucleophilic substitution reaction, order of halogens as incoming (attacking) nucleophile is: $$I^- > Br^- > Cl^-$$. The order of halogens as departing nucleophile should be :
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The major product in the following reaction
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Cannizaro's reaction is not given by :
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Phenol on heating with CHCl$$_3$$ and NaOH gives salicylaldehyde. The reaction is called:
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Which of the following reagent(s) used for the conversion?
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Carbylamine forms from aliphatic or aromatic primary amine via which of the following intermediates?
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Which of the following statement is not correct?
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Bakelite is obtained from phenol by reacting with:
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Among the following vitamins the one whose deficiency causes rickets (bone deficiency) is :
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