List of practice Questions

A $100\, m$ long wire having cross-sectional area $625 \times 10^{-4} \, m ^2$ and Young's modulus is $10^{10} Nm ^{-2}$ is subjected to a load of $250 \, N$, then the elongation in the wire will be:
As shown in the figure, a network of resistors is connected to a battery of $24 V$ with an internal resistance of $3 \Omega$ The currents through the resistors $R_4$ and $R_5$ are $I_4$ and $I_5$ respectively The values of $I _4$ and $I _5$ are:$(24 V , 3 \Omega)$
As shown in the figure, a network of resistors is connected to a battery of 24V with an internal resistance of 3 Ω 3Ω
Choose the correct answer from the options given below:
LIST ILIST II
APlanck's constant (h)1\(\left[ M ^1 L ^2 T ^{-2}\right]\)
BStopping potential (Vs)2\(\left[ M ^1 L ^1 T ^{-1}\right]\)
CWork function (ø)3\(\left[ M ^1 L ^2 T ^{-1}\right]\)
DMomentum (p)4\(\left[ M ^1 L ^2 T ^{-3} A ^{-1}\right]\)
The weight of a body at the surface of earth is $18\, N$ The weight of the body at an altitude of $3200 \,km$ above the earth's surface is (given, radius of earth $R _{ e }=6400 \,km$ ):
A conducting circular loop of radius $\frac{10}{\sqrt{\pi}} cm$ is placed perpendicular to a uniform magnetic field of $0.5 T$ The magnetic field is decreased to zero in $0.5 s$ at a steady rate The induced emf in the circular loop at $0.25 s$ is:
The maximum vertical height to which a man can throw a ball is $136 \,m$ The maximum horizontal distance upto which he can throw the same ball is:
If two charges $q _1$ and $q _2$ are separated with distance ' $d$ ' and placed in a medium of dielectric constant $K$ What will be the equivalent distance between charges in air for the same electrostatic force?
Match List I with List II
LIST ILIST II
AChlorophyll1\(Na _2 CO _3\)
BSoda ash2\(CaSO _4\)
CDentistry, Ornamental work3\(Mg ^{2+}\)
DUsed in white washing4\(Ca ( OH )_2\)

The magnetic moment of a transition metal compound has been calculated to be 3.87 B.M. The metal ion is

Decreasing order of the hydrogen bonding in following forms of water is correctly represented by
A. Liquid water
B. Ice
C. Impure water 
Choose the correct answer from the options given below:

An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime The metal ion is:

It is observed that characteristic $X$-ray spectra of elements show regularity When frequency to the power " $n$ " ie $v^n$ of $X$-rays emitted is plotted against atomic number " $Z$ ", following graph is obtained

Increasing order of stability of the resonance structures is: Choose the correct answer from the options given below:
The primary and secondary valencies of cobalt respectively in \([ Co(NH_3)_5Cl]Cl_2\) are :
Let $\Omega$ be the sample space and $A \subseteq \Omega$ be an event .
Given below are two statements : 
(S1): If $P ( A )=0$, then $A =\emptyset$ 
(S2): If $P(A)=1$, then $A=\Omega$
Then
The value of $\displaystyle\sum_{r=0}^{22}{ }^{22} C_r{ }^{23} C_r$ is
The distance of the point $(-1,9,-16)$ from the plane $2 x+3 y-z=5$ measured parallel to the line $\frac{x+4}{3}=\frac{2-y}{4}=\frac{z-3}{12}$ is
Let $N$ denote the number that turns up when a fair die is rolled If the probability that the system of equations$ x+y+z=1 $ $ 2 x + Ny +2 z=2 $ $ 3 x +3 y+ N z=3$ has unique solution is $\frac{k}{6}$, then the sum of value of $k$ and all possible values of $N$ is
1 L, 0.02 M solution of [Co(NH3)5 SO4]Br is mixed with 1 L, 0.02 M solution of [Co(NH3)5Br]SO4.  The resulting solution is divided into two equal parts (X) and treated with excess of AgNO3 solution and BaCl2 solution respectively as shown below:
1 L Solution (X) + AgNO3 solution (excess) →  Y  
1 L Solution (X) + BaCl2 solution (excess) → Z
The number of moles of Y and Z respectively are
The shortest distance between the lines $\frac{x-5}{1}=\frac{y-2}{2}=\frac{z-4}{-3}$ and $\frac{x+3}{1}=\frac{y+5}{4}=\frac{z-1}{-5}$ is
Which of the following complex will show largest splitting of $d$-orbitals?
If $y=y(x)$ is the solution curve of the differential equation $\frac{d y}{d x}+y \tan x=x \sec x, 0 \leq x \leq \frac{\pi}{3}, y(0)=1$ then $y\left(\frac{\pi}{6}\right)$ is equal to
In a binomial distribution $B(n, p)$, the sum and the product of the mean and the variance are 5 and 6 respectively, then $6(n+p-q)$ is equal to
Given below are two statements : One is labelled as Assertion \(A\) and the other is labelled as Reason R 
Assertion A : Two metallic spheres are charged to the same potential One of them is hollow and another is solid, and both have the same radii Solid sphere will have lower charge than the hollow one. 
Reason R : Capacitance of metallic spheres depend on the radii of spheres.
In the light of the above statements, choose the correct answer from the options given below.

The graph which represents the following reaction is :