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Normality of a solution containing $9.8 \text{ g}$ of $\text{H}_2\text{SO}_4$ in $250 \text{ cm}^3$ of the solution is
The calculated spin only magnetic moment of $Cr^{2+}$ ion is:
In which of the following pairs are both the ions coloured in aqueous solution? (At. no : $\text{Sc} = 21$, $\text{Ti} = 22$, $\text{Ni} = 28$, $\text{Cu} = 29$, $\text{Co} = 27$)
More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is:
A pair among the following have nearly the same atomic radii: (Numbers in the parenthesis are atomic numbers).
$0.5$ molal aqueous solution of a weak acid ($\text{HX}$) is $20\%$ ionised. If $K_f$ for water is $1.86 \text{ K kg mol}^{-1}$, the lowering in freezing point of the solution is:
The major product of the following reaction is: [Image of Phthalic acid reacting with NH3 under strong heating]
Identify the pair of Lanthanoides with one strong oxidant and one strong reductant:
Aluminium chloride in acidified aqueous solution forms a complex 'A'. The formula of A and hybridisation state of Al in 'A' is respectively:
Which of the statements is not true?
$\text{HgCl}_2$ and $\text{I}_2$ both when dissolved in water containing $\text{I}^-$ ions, the pair of species formed is:
Which of the following statements are incorrect? A. All the transition metals except scandium form MO oxides which are ionic. B. The highest oxidation number corresponding to the group number in transition metal oxides is attained in $Sc_2O_3$ to $Mn_2O_7$. C. Basic character increases from $V_2O_3$ to $V_2O_4$ to $V_2O_5$. D. $V_2O_4$ dissolves in acids to give $VO_4^{3-}$. E. CrO is basic, but $Cr_2O_3$ is amphoteric. Choose the correct answer from the options given below:
Which one of the following statements is correct when $\text{SO}_2$ is passed through acidified $\text{K}_2\text{Cr}_2\text{O}_7$ solution?
Which of the following statements is not correct about diborane?
Which of the following species is not stable?
The basic structural unit of silicates is:
Urea reacts with water to form A which will decompose to form B. B when passed through $Cu^{2+}(aq)$, deep blue colour solution C is formed. What is the formula of C from the following?
The number of moles of $MnO_4^-$ being reduced to $Mn^{2+}$ under acidic conditions by $4.517 \times 10^{24}$ electrons are:
Match Column-I with Column-II and mark the most appropriate option: **Column-I (Metal ion)** (A) $\text{Co}^{3+}$ (B) $\text{Cr}^{3+}$ (C) $\text{Fe}^{3+}$ (D) $\text{Ni}^{2+}$ **Column-II (Spin magnetic moment)** (i) $\sqrt{8}\text{ B.M.}$ (ii) $\sqrt{35}\text{ B.M.}$ (iii) $\sqrt{15}\text{ B.M.}$ (iv) $\sqrt{24}\text{ B.M.}$
The pair of lanthanoid ions, consisting of elements which are diamagnetic, is: