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Phloem in gymnosperms lacks :
Correct increasing order for the wavelengths of absorption in the visible region for the complexes of $Co^{3+}$ is:
Among them, intensive property is:
The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic mass $16$ is:
Which of the following species has a linear shape?
Which of the following is not a correct statement?
Which one of the following species has a plane triangular shape?
An electron-deficient compound among the following is:
A paramagnetic molecule among the following is:
Pinus seed cannot germinate and established without fungal association. This is because :
An isostructural compound with $XeF_2$ among the following is:
Identify the incorrect statement among the following:
An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is
Which orbital does the additional electron occupy when $O_{2}$ is converted to the $O_{2}^{-}$ ion?
Which of the following species contains three bond pairs and one lone pair around the central atom?
Consider the following List-I and List-II: **List-I (Molecule)** (a) $PCl_{5}$ (b) $SF_{6}$ (c) $BeCl_{2}$ (d) $NH_{3}$ **List-II (Shape or geometry)** (i) Trigonal planar (ii) Octahedral (iii) Linear (iv) Trigonal pyramidal Identify the **wrong** match from the given pairs:
Consider the given compound: In the given options, the following for the above compound are, respectively: (i) $sp^{2}$ hybridised carbon atoms and (ii) $\pi$ bonds.
In which of the following pairs of molecules/ions, the central atoms have $sp^2$ hybridization?
Among the following, isoelectronic species are:
An inductor 20 mH, a capacitor 50 μF, and a resistor 40 Ω are connected in series across a source of emf V = 10 sin 340t. The power loss in the AC circuit is: