List of practice Questions

Graph between stopping potential of most energetic emitted photoelectrons (\(V_s\)) and frequency (\(\nu\)) of incident radiation on metal is given. Value of slope AB/BC in graph is [where \(h\) = Planck’s constant, \(e\) = electronic charge]: 

Find the final intensity of light (\(I''\)), if the angle between the axes of two polaroids is \(60^\circ\). 

The combination of gates shown below yields: 

\(K_c\) for the reaction \([\text{Ag(CN)}_2]^-\rightleftharpoons \text{Ag}^+ + 2\text{CN}^-\) is \(4.0\times10^{-19}\) at \(25^\circ\text{C}\). The equilibrium concentration of silver cation in a solution which was originally \(0.1\) molar in KCN and \(0.03\) molar in AgNO\(_3\) is:
In the cell reaction \(\text{Cu(s)} + 2\text{Ag}^+(\text{aq}) \rightarrow \text{Cu}^{2+}(\text{aq}) + 2\text{Ag(s)}\), \(E^\circ_{\text{cell}} = 0.46\,\text{V}\). By doubling the concentration of \(\text{Cu}^{2+}\), \(E_{\text{cell}}\) is:
Cu\(^+\) is unstable in solution and undergoes simultaneous oxidation and reduction according to the reaction \(2\text{Cu}^+(\text{aq}) \rightarrow \text{Cu}^{2+}(\text{aq}) + \text{Cu(s)}\). Choose the correct \(E^\circ\) for the above reaction if \(E^\circ_{\text{Cu}^{2+}/\text{Cu}} = +0.34\,\text{V}\) and \(E^\circ_{\text{Cu}^+/\text{Cu}} = +0.15\,\text{V}\).
A gaseous reaction \(X_2(g) \rightarrow Y + \frac{1}{2}Z(g)\). There is an increase in pressure from 100 mm to 120 mm in 5 minutes. The rate of disappearance of \(X_2\) is:

\[ \text{Ph–CH(OH)–CHO} \xrightarrow[\text{H}_2\text{O}]{\text{HO}^-} Q \] P and Q are isomers. Identify Q. 



Consider the following phenols as shown in the figure. The decreasing order of acidity of the above phenols is: 

Aniline reacts with phosgene and KOH to form: 

Find the missing number from the given response. 

Which of the following represents coal mines, factories and fields? 

What is the water image of the below figure? 

A piece of paper is folded and pinched as shown. How will it appear when unfolded? 



If ‘+’ means ‘×’, ‘−’ means ‘+’, ‘×’ means ‘÷’ and ‘÷’ means ‘−’, then \(6 − 9 + 8 × 3 ÷ 20 = ?\)
Here are some words translated from an artificial language. mallon pimm means blue light mallon tiff means blue berry arpan tiff means rasp berry Which word could mean ‘light house’?
In a certain code language, ‘SAFER’ is written as ‘5@3#2’ and ‘RIDE’ is written as ‘2C%#’, how would ‘FEEDS’ be written in that code?
If the first and second letters of the word DEPRESSION were interchanged, also the third and fourth letters, the fifth and the sixth letters and so on, then which of the following would be the seventh letter from the right?
Today is Thursday. The day after 59 days will be
Find out the missing term in the series: 1, 8, 27, ?, 125, 216
They were afraid _ _ _ _ the lion, so they dropped the idea of hunting in jungle.
Our company signed a profitable _ _ _ _ last month.
What is your _ _ _ _ for tonight?
Arrange the following sentences in the correct order: I. Today we live in modern technology era.
P. We want to get everything in one day.
Q. We have a lot of problems now.
R. Ancient time was quite pleasant.
S. We had no problems then.
6. Perhaps greed is the main cause for this.
Arrange the following sentences in the correct order: I. He is a common man.
P. Yesterday our city saw a brutal crime.
Q. Police is trying to arrest innocent persons.
R. The criminals are well known.
S. Police as well as whole system is corrupt.
6. Police will arrest him as he is an easy target because of being a common man.