In which of the following, the molecules are arranged in the increasing order of their bond angles?

Given below are two statements
Statement I: Cytosine and guanine are formed in equal quantities in DNA hydrolysis
Statement II: Adenine and uracil are formed in equal quantities in RNA hydrolysis
The correct answer is

White metal is an alloy of

Which of the following reactions can be used to prepare diborane? $\mathrm{I}) {\mathrm{BF}}_3+LiAl{\mathrm{H}}_4\stackrel{\mathrm{ether}}{\to }$ $\mathrm{II})$ ${\mathrm{BF}}_3+\mathrm{NaH}\stackrel{450 \mathrm{K}}{⟶}$
$\mathrm{III}) {\mathrm{Na}}_2{\mathrm{B}}_4{\mathrm{O}}_7+{\mathrm{H}}_2\mathrm{O}⟶$
$\mathrm{IV}) {\mathrm{NaBH}}_4+{\mathrm{I}}_2⟶$

The standard reduction potentials of \(\mathrm{Zn}^{2+}\left|\mathrm{Zn}, \mathrm{Cu}^{2+}\right| \mathrm{Cu}\) and \(\mathrm{Ag}^{+} \mid \mathrm{Cu}\) and \(\mathrm{Ag}^{+} \mid \mathrm{Ag}\) are respectively \(-0.76,0.34\) and \(0.8 \mathrm{~V}\). The following cells were constructed :
(1) \(\mathrm{Zn}\left|\mathrm{Zn}^{2+}\right|\left|\mathrm{Cu}^{2+}\right| \mathrm{Cu}\)
(2) \(\mathrm{Zn}\left|\mathrm{Zn}^{2+}\right|\left|\mathrm{Ag}^{+}\right| \mathrm{Ag}\)
(3) \(\mathrm{Cu}\left|\mathrm{Cu}^{2+} \| \mathrm{Ag}^{+}\right| \mathrm{Ag}\)
What is the correct order of \(E_{\text {cell }}^{\circ}\) of these cells?

When an aqueous solution of \(\mathrm{CuCl}_2\) is electrolysed using Pt inert electrodes, the reaction at cathode and anode respectively are

Ozonolysis of an organic compound ' \(A\) ' produces acetone and propanal in equimolar mixture. Identify ' \(A\) ' from the following compownd.

If \(f(x, y)=\frac{\cos (x-4 y)}{\cos (x+4 y)}\), then \(\left.\frac{\partial f}{\partial x}\right|_{y=\frac{x}{2}}\) is equal to :

\(\bar{a}, \bar{b}\) are position vectors of the points \(A\) and \(B\) respectively, \(C\) and \(D\) are points on the line AB such that \(\overline{\mathrm{AB}}, \overline{\mathrm{AC}}\) and \(\overline{\mathrm{BD}}, \overline{\mathrm{BA}}\) are two pairs of like vectors. If \(\overline{\mathrm{AC}}=3 \overline{\mathrm{AB}}\) and \(\overline{\mathrm{BD}}=2 \overline{\mathrm{BA}}\), then \(\overline{\mathrm{CD}}=\)

If \(2 x^2-5 x y+2 y^2=0\) represents two sides of a triangle whose centroid is \((1,1)\), then the equation of the third side is

Consider the following reaction
\(\mathrm{N}_2(g)+3 \mathrm{H}_2(g) \longrightarrow 2 \mathrm{NH}_3(g)\)
The rate of this reaction in terms of \(\mathrm{N}_2\) at \(T \mathrm{~K}\) is \(\frac{-d\left[\mathrm{~N}_2\right]}{d t}=0.02 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}\). What is the value of \(-d\left[\mathrm{H}_2\right] / d t\) (in units of \(\mathrm{mol} \mathrm{L}^{-1} \mathrm{~s}^{-1}\) ) at the same temperature.

If the lines \(2 x+y-3=0,3 x+2 y-2=0, k x-3 y-23=0\) are concurrent, then the roots of the equation \(6 x^2-7 x+k=0\) are

If $f\left(x\right)=\frac{1}{\left({\cos }^{2}x\right)\sqrt{1+\tan x}}$, then its anti-derivative $F\left(x\right)=\underline{ },$ given $F\left(0\right)=4$