List of practice Questions

Why do most chemical reaction rates increases rapidly as the temperature rises?
Pollution is
$ 1\, C $ electricity deposits
Potassium metabisulphite is a (an)
The number of metamers possible for $ C_4H_{10}O $ is
The wave number of the spectral line in the emission spectrum of hydrogen will be equal to $\frac {8}{9}$ times the Rydberg's constant if the electron jumps from _______
Equation of the circle centered at $(4, 3)$ touching the circle $x^2+y^2-1$ externally, is _____
If $A$ is a $3 \times 3$ nonsingular matrix and if $|A | = 3$, then $|(2A)^{-1}|$= _______
The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
The digit in the unit place of $2009! + 3^{7886}$ is
The type of hybridisation of nitrogen atom in $ {NH_3}$ is
Gibb's free energy G is defined as
Which of the following ores will be concentrated by froth floatation method?
Angular frequency of an electron in Bohr atom with quantum number n is proportional to
As resistance in a series resonant circuit increases (i) sharpness of resonance decreases (ii) bandwidth increases
In the group $\{1, 2, 3, 4, 5, 6\}$ under multiplication modulo $7$, if $5x = 4$, then $x =$
If $x= a\left(\cos \theta +\theta \sin \theta\right)$ and $ y = a \left(\sin \theta- \theta \cos \theta \right) $ where $0 < \theta < \frac{\pi}{2}$ , then $ \frac{d^{2}y}{dx^{2}}$ at $ \theta = \frac{\pi}{4}$ is equal to
If $\log y= m \tan^{-1} x,$ then
If $f\left(9\right)= 9 , f'\left(9\right) = 4 $ then $\lim_{x\to9} \frac{\sqrt{f\left(x\right)} -3}{\sqrt{x} - 3} = $
Let $y' = e^{-2x} $ and $ y = 0$ when $x =e$. Then the value of $x$ when $ y =\frac{1}{2}$ is
Excited H atom emits a photon of energy $12.1 \, eV$, orbital angular momentum of electron changes by
Fehling's reagent contains
For a cell reaction involving two electron change, the standard e.m.f. of the cell is found to be 0.295 Vat 298 K. The equilibrium constant of the reaction at the same temperature will be
Hofmann's bromamide reaction is used to convert
If the rate equation for reaction is, rate =$ k[A][B]^{1/2}$, the order of reaction is