List of practice Questions

The Bohr orbit radius for the hydrogen atom ($n = 1$) is approximately 0.530 ${Å}$. The radius for the first excited state ($n = 2$)
orbit is (in ${Å}$):

Player 1 and player 2 are running around a circular field. Player 1 takes 15 minutes to take one round, while Player 2 completes the round in 25 minutes. If both start simultaneously and go in the same direction, after how much time will they meet at the starting point? (Answer to be provided only in minutes)

Fill in the blanks with appropriate prepositions from the given options:
In a bid to check urban apathy _______ voters, the Election comission had decided _______ hold the poll _________ the middle _________ the week to prevent people planning an outing by clubbing the poll day holiday with the weekend break.

Which one is a reaction to prepare CCl₂F₂(freon-12) from CCl₄?

What do the following plays have in common?
(A) The Way of the World
(B) The Stoops to Conquer
(C) The Importance of Being Earnest
(D) Pygmalion
Choose the correct answer from the options given below:

Methylamine reacts with HNO₂ to form?

Cobalt chloride when dissolved in water forms pink colored complex $X$ which has octahedral geometry. This solution on treating with cone $HCl$ forms deep blue complex, $\underline{Y}$ which has a $\underline{Z}$ geometry $X, Y$ and $Z$, respectively, are

Suppose massive capital outflows cause nominal exchange rate to depreciate by 10%. At the same time, foreign and domestic price levels rise by 5% and 20% respectively. What will be the approximate change in real exchange rate?

The maximum value of the monetary policy multiplier is _____(where b implies sensitivity of planned investment spending to interest rate, c implies marginal propensity to consume and t = marginal tax rate, k implies sensitivity of money demand to interest rate).

$I _{ CM }$ is the moment of inertia of a circular disc about an axis (CM) passing through its center and perpendicular to the plane of disc $I_{A B}$ is it's moment of inertia about an axis $AB$ perpendicular to plane and parallel to axis $CM$ at a distance $\frac{2}{3} R$ from center Where $R$ is the radius of the dise The ratio of $I _{ AB }$ and $I _{ CM }$ is $x: 9$ The value of $x$ is______