The segment of DNA which acts as the instruction manual for the synthesis of the protein is

Which of the following is an INCORRECT statement?

The hybridisation of atomic orbitals of nitrogen in \(\text{NO}_2^+\), \(\text{NO}_3^-\) and \(\text{NH}_4^+\) are respectively

Liquor ammonia bottles are opened only after cooling. This is because

Choose the correct metal/ ion from the brackets which ..........
A. has chemical reactivity similar to that of the first few members of the Lanthanoids \((\mathrm{Zn}, \mathrm{Ca}, \mathrm{Fe}, \mathrm{Cu})\).
B. has stable \(4 \mathrm{f}^7\) electronic configuration, but acts as a strong reducing agent and converts to \(\mathrm{M}^{3+}\) state. \(\left(\mathrm{Eu}^{2+}, \mathrm{Ce}^{2+}, \mathrm{Pr}^{2+}, \mathrm{Dy}^{2+}\right)\)
C. is a colorless ion \(\left(\mathrm{Tm}^{3+}, \mathrm{Lu}^{3+}, \mathrm{Gd}^{3+}, \mathrm{Sm}^{3+}\right)\).
D. shows stable +2 oxidation state and is diamagnetic \((\mathrm{Ce}, \mathrm{Sm}, \mathrm{Ho}, \mathrm{Yb})\)

Just before attaining the chemical equilibrium

A Coordination compound is represented by the formula \([\mathrm{CoBr}_3(e n) x]\). This compound required one mole of \(\mathrm{AgNO}_3\) to form a pale yellow precipitate of \(\mathrm{AgBr}\). What is the value of \(\mathrm{x}\) in the compound?

The enthalpy of the reaction,
\(\mathrm{H}_{2}(g)+1 / 2 \mathrm{O}_{2}(g) \longrightarrow \mathrm{H}_{2} \mathrm{O}(g)\) is \(\Delta H_{1}\) and that of \(\mathrm{H}_{2}(g)+1 / 2 \mathrm{O}_{2}(g) \longrightarrow \mathrm{H}_{2} \mathrm{O}(l)\) is \(\Delta \mathrm{H}_{2}\). Then

Four metal conductors having different shapes a sphere, cylindrical, pear, lightning conductor are mounted on insulating stands and charge(d) The one which is best suited to retain the charges for a longer time is

Water flows from a tap with steady flow, through a cross sectional area of \(10^{-3} \mathrm{~m}^2\) with a speed of \(0.5 \mathrm{~ms}^{-1}\). Assume the pressure is constant throughout the stream of water. The cross sectional area of the stream \(0.19 \mathrm{~m}\) below the tap is

Which of the following chemicals does not liberate hydrogen gas on reaction with aluminium metal?

\(\sqrt{2+\sqrt{2+\sqrt{2+2 \cos 8 \theta}}} \text { where } \theta \in\left[-\dfrac{\pi}{8}, \dfrac{\pi}{8}\right] \text { is equal to }\)

A coil of inductance \(1 \mathrm{H}\) and resistance \(100 \Omega\) is connected to an alternating current source of frequency \(\dfrac{50}{\pi} \mathrm{~Hz}\). What will be the phase difference between the current and voltage?