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Match List-I with List-II: List-I (Compounds) (a) Borax (b) Kernite (c) Orthoboric acid (d) Borax bead List-II (Molecular formula) (i) $NaBO_2 + B_2O_3$ (ii) $Na_2B_4O_7 \cdot 4H_2O$ (iii) $H_3BO_3$ (iv) $Na_2B_4O_7 \cdot 10H_2O$ Choose the correct answer from the options given below:
A molecule among the following that has the maximum dipole moment is:
4.74 g of an inorganic compound contains 0.39 g of K, 0.27 g of Al, 1.92 g of $SO_4$ radicals and 2.16 g of water. If molar mass of the compound is $948 \text{ g mol}^{-1}$, the molecular formula of the inorganic compound is:
Which of the following statements is incorrect?
An isostructural compound with $XeF_2$ among the following is:
Incorrect statement among the following about zeolites is:
Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their
What fraction of Fe exists as Fe(III) in $Fe_{0.96}O$? (Consider $Fe_{0.96}$ to be made up of Fe(II) and Fe(III) only)
Which of the compounds given below will exhibit a linear structure?
The volume of $CO_2$ obtained by the complete decomposition of $9.85\text{ g}$ of $BaCO_3$ is:
Suppose that the elements $X$ and $Y$ combine to form two compounds $XY_2$ and $X_3Y_2$. If $0.1 \text{ mole}$ of $XY_2$ weighs $10 \text{ g}$ and $0.05 \text{ mole}$ of $X_3Y_2$ weighs $9 \text{ g}$, the atomic weight of $X$ and $Y$, respectively, will be:
Which of the two ions from the list given below have the geometry that is explained by the same hybridisation of orbitals, $NO_2^-$, $NO_3^-$, $NH_2^-$, $NH_4^+$, $SCN^-$?
Match the hominids with their correct brain size : (a) Homo habilis (i) 900 cc (b) Homo neanderthalensis (ii) 1350 cc (c) Homo erectus (iii) 650-800 cc (d) Homo sapiens (iv) 1400 cc Select the correct option.
A diatomic molecule, among the following species, that only has $\pi$ bonds according to the Molecular Orbital Theory (MOT) is:
$25.3\text{ g}$ of Sodium carbonate $\text{Na}_2\text{CO}_3$ is dissolved in enough water to make $250\text{ mL}$ of solution. If sodium carbonate dissociates completely, molar concentration of sodium ion, $\text{Na}^+$ and carbonate ion $\text{CO}_3^{2-}$ are respectively (Molar mass of $\text{Na}_2\text{CO}_3 = 106\text{ g mol}^{-1}$)
One mole of carbon atom weighs $12 \text{ g}$, the number of atoms in it is equal to: (Mass of carbon-12 is $1.9926 \times 10^{-23} \text{ g}$)
Which of the following is required as an inducer(s) for the expression of lac operon?
Concentrated aqueous sulphuric acid is $98\%$ $\text{H}_2\text{SO}_4$ by mass and has a density of $1.80\text{ g mL}^{-1}$. Volume of acid required to make one litre of $0.1\text{ M}$ $\text{H}_2\text{SO}_4$ solution is:
Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?
The geometry and magnetic behaviour of the complex $[Ni(CO)_4]$ are