Browse and search thousands of solved questions for your preparation.
Free questions with full explanations — locked behind signup to protect quality.
Colourless ion among the following is:
In a Borax bead test, which compound is formed?
For the reaction $PbO_2 \rightarrow PbO$, $\Delta G_{298} < 0$, and for the reaction $SnO_2 \rightarrow SnO$, $\Delta G_{298} > 0$. The most probable oxidation states of Pb and Sn will be respectively:
Which of the following is a coloured and paramagnetic compound?
The volume occupied by one water molecule (density = $1 \text{ g cm}^{-3}$) is:
If $1 \text{ gram}$ of sodium hydroxide was treated with $25 \text{ mL}$ of $0.75 \text{ M}$ HCl solution, the mass of sodium hydroxide left unreacted is equal to:
What is the correct relationship between changes in enthalpy and internal energy within the following options?
The pair of species with the same bond order is:
Paramagnetic species among the following is:
The most characteristic oxidation state for lead and tin is, respectively:
The percentages of C, H, and N in an organic compound are 40%, 13.3%, and 46.7% respectively. The empirical formula of the compound is:
$20.0\text{ g}$ of a magnesium carbonate sample decomposes on heating to give carbon dioxide and $8.0\text{ g}$ magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (Atomic weight of Mg = 24)
Which of the following is the correct statement?
Which among the following has the maximum number of molecules?
The correct order of electronegativity of hybrid orbitals of carbon is:
Among the following, the pair in which the two species are not isostructural is:
Which of the following is not a monomer for a high molecular mass silicone polymer?
Choose the compound which has a maximum bond angle at nitrogen among the following:
Which one of the following pairs of species have the same bond order?
Match the molecules in List-I with the corresponding shape in List-II: List-I (Molecules): (a) $NH_3$ (b) $ClF_3$ (c) $PCl_5$ (d) $BrF_5$ List-II (Shape): (i) Square pyramidal (ii) Trigonal bipyramidal (iii) Trigonal pyramidal (iv) T-shape Choose the correct answer from the options given below: