List of practice Questions

Draw the energy level diagram for hydrogen atom. Show the transitions of Lyman, Balmer, Paschen, Brackett and Pfund series in the diagram. In which region do these spectrum lie?

If \[ \sqrt{218 + \sqrt{37 + \sqrt{144}}} = K, \text{ then value of } K \text{ is} \]

The reducing agent in the given equations :
\(4\ Ag_{(s)}+8\ CN_{(aq)}^-+2H_2O_{(aq)}+O_{2_{(g)}}\rightarrow4[Ag(CN)_2]_{(aq)}^-+4\ OH_{(aq)}^-\)
\(2[Ag(CN)_2]_{(aq)}^-+Zn_{(s)}\rightarrow[Zn(CN)_4]_{(aq)}^{2-}+2Ag_{(s)}\)

The Points (1,3), (5,1) are Opposite vertices of a diagonal of a rectangle. If the other two vertices lie on the line y=2x+c, then one of the vertex on the other diagonal is? 
 

A small block of mass 100 g is tied to a spring of spring constant 7.5 N/m and length 20 cm. The other end of spring is fixed at a particular point A. If the block moves in a circular path on a smooth horizontal surface with constant angular velocity 5 rad/s about point A, then tension in the spring is-

What will be the refractive index of a thin prism material if its refracting angle and angle of deviation are the same?

Write the chemical reactions for the following:
i. Chlorobenzene is heated with fuming H\(_2\)SO\(_4\)
ii. Ethyl bromide is heated with silver acetate

Which among the following pair of words carry the same relationship as:
Cheerful: Merry

Pick the incorrect part in the given sentence.
The blessings that the habit of reading confers/on their possessor/are many provided we/choose the right kind of books. 

Choose the part of the following sentence that contains an error :
It is the quarter to ten by my watch.

The work done in placing a charge of \( 8 \times 10^{-18} \) coulomb on a capacitor of capacitance 100 microfarad is:

Always beware ............. dubious people.

We should not laugh ............. the poor.

A piece of paper is folded and cut as shown below. From the given figures, indicate how it will appear when it is opened?

In which option problem figure is ambedded:
Problem Figure:
Answer Figure:

The magnetic moment of an electron (e) revolving in an orbit around the nucleus with an orbital angular momentum is given by:

Students of all the departments of a college who have successfully completed the registration process are eligible to vote in the upcoming college elections. By the due date, none of the students from the Department of Human Sciences had completed the registration process. Which set(s) of statements can be inferred with certainty?
(i) All those students who would not be eligible to vote would certainly belong to the Department of Human Sciences.
(ii) None of the students from departments other than Human Sciences failed to complete the registration process within the due time.
(iii) All the eligible voters would certainly be students who are not from the Department of Human Sciences.

A 100m long wire having cross-sectional area \( 6.25 \times 10^{-4} \, {m}^2 \) and Young's modulus is \( 10^{10} \, {Nm}^{-2} \) is subjected to a load of 250N, then the elongation in the wire will be:

The reaction that does NOT take place in a blast furnace between 900K to 1500K temperature range during extraction of iron is:

Choose the correctly spelt word.

Choose the part of the following sentence that contains an error :
The most important feature of our products are that they are all created by hand.

What can be placed at '?' if both side of '::' have same relationship between numbers:
85 : 42 :: 139 : ?