Nitrogen in trimethylamine is \No Solution(\mathrm{sp}^3\) hybridized. The C-N-C bond angle is \(108^{\circ}\). The geometry of trimethylamine is

Sodium chloride solution also called normal saline solution which is safe to inject intravenously has a concentration of :

Which of the following can be used as a froth stabiliser during ore concentration?

The best reagent for preparing an alkyl chloride from an alcohol is

Arrange the following alcohols in decreasing order of acidity:

Choose the correct answer from the options given below:

For a reaction \(A \rightarrow C + D\), the initial concentration of \(A\) is \(0.010\ M\).
After \(100\ s\), the concentration of \(A\) is \(0.001\ M\).
The rate constant has numerical value 9.0.
The order of reaction is:

Elements of group-15, 16 and 17 form compounds with hydrogen with general formula MH3, \(H 2 M\) and HX (called hydrogen halides). Stability of these hydrides, along with M-H bond strength and basic nature decreases down the group. Boiling point of these hydrides mainly depends on the strength of their inter molecular forces.
Bond angle (HMH) among hydrides of group-16 decreases down the group because:

2, 4, 6 - trinitrophenol is
[Structure: Phenol ring with \(- NO _2\) groups at positions 2, 4, and 6]

\(\text{KMnO}_4\) is a versatile oxidising agent and it can act as a very strong oxidising agent in acidic medium. Identify the correct statement.

Transition metals form a large number of complexes or coordination compounds in which the metal atoms are bound to a number of anions or neutral molecules. The valence bond theory explain the formation, magnetic behaviour and geometrical shapes while the crystal field theory explains the effect of different crystal fields on the degeneracy of d-orbitals energies of the central metal atom/ion. This provides for the quantitative estimation of orbital separation energies, magnetic moments and spectral and stability parameters.
Two complexes of nickel have same geometry but different magnetic behaviour are:
(A) \(\text{[Ni(CN)}_4]^{2-}\)
(B) \(\text{[Ni(CO)}_4]\)
(C) \(\text{[NiCl}_4]^{2-}\)
(D) \(\text{[Ni(NH}_3)_6]^{2+}\)
Choose the correct answer from the options given below :

Phytophagous insects feed on :

If \(A\) is a square matrix of order 3 and \(|A|=5\), then the value of \(\left|-A A^T\right|\) is :

Calculate the oxidation number of cobalt in
\(\mathrm{K}\left[\mathrm{Co}(\mathrm{CO})_4\right]\)