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A molecule that cannot exist is:
Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?
Which pair of the following compounds has one lone pair of electrons on the central atom?
Among the given complexes, the complex having the highest paramagnetic behaviour is: (At. No. Ti = 22, Cr = 24, Co = 27, Zn = 30)
Which molecule among the following is non-polar?
The correct order of solubility in an aqueous medium is:
Which one of the following statements is correct?
A screw gauge gives the following readings when used to measure the diameter of a wire. Main scale reading : 0 mm. Circular scale reading : 52 divisions. Given that 1 mm on main scale corresponds to 100 divisions on the circular scale. The diameter of the wire from the above data is
The correct order of bond angles in the following compounds/species is:
Mg is present in:
The complexes $[\text{Co}(\text{NH}_3)_6][\text{Cr}(\text{CN})_6]$ and $[\text{Cr}(\text{NH}_3)_6][\text{Co}(\text{CN})_6]$ are examples of:
The coordination compound that gives the maximum number of isomers is:
Predict the correct order among the following.
Which of the following has proved helpful in preserving pollen as fossils?
The correct order of energies of molecular orbitals of N$$_2$$ molecule is:
$[Cu(NH_3)_4]^{2+}$ reacts with $HNO_3$ in excess of water and gives:
Following statements describe the characteristics of the enzyme Restriction Endonuclease. Identify the incorrect statement.
Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?
Which one of the following molecules contain no $\pi$ -bond?
For the given circuit, the input digital signals are applied at the terminals $A$, $B$ and $C$. What would be the output at the terminal $y$?