List of practice Questions

Difference between virus and viroid is

When was Article 370 removed from J&K?

Ethyl magnesium bromide and chloramine react to produce
To obtain a magnified image at distance of distinct vision with a simple microscope, where should the object be placed ?
To get a resultant displacement of 10 m two displacement vectors, one of magnitude 6m and another of 8m should be combined.
What is the image of the point (2, 3) in the line y = - x ?
Which of the following is unitless quantity ?

If there is a charge on the surface of sphere, what will be the electric field inside the sphere?

Two taps supply water to a container, one at the temperature of $20^{\circ}C$ at the rate of $2 \,$kg/minute and another at $80^{\circ}C$ at the rate of $1$ kg/minute. If the container gets water from the two taps simultaneously for $10$ minutes, then the temperature of water in the container is
For which of the following dispersive power is zero ?
The commercial name of polyacrylonitrile is
An element crystallises in a b.c.c. lattice. Nearest and next nearest neighbours are respectively
The maximum value of sin $\theta $ cos $\theta$ is
The mass of moon is 1% o f mass of earth. The ratio of gravitational pull of earth on moon and that of moon on earth will be
Two matrices A and B are multiplicative inverse of each other only if
If (a, b), (c, d) and (a - c, b - d) are collinear, then which one of the following is correct ?
If at 298 K the bond energies of C-H, C-C, C = C and H-H bonds are respectively 414, 347, 615 and 435 kJ $mol^{-1}$ the value of enthalpy change for the reaction.$H_2C = CH_2(g) + H_2(g) -----> H_3C-CH_3(g)$ at 298 K will be
Identified A, B, C and D.

Six vectors, $\vec{a}$ through $\vec{f}$ have the magnitudes and directions indicated in the figure. Which of the following statements is true?

In two different systems of units, acceleration is represented by the same number while a velocity is represented by numbers in the ratio $1 : 3$. The ratios of unit of length and time are, respectively,
The control rods used in a nuclear reactor can be made up of
Consider the following statement: "The mean of a binomial distribution is 3 and variance is 4." Which of the following is correct regarding this statement?
Quantisation of charge implies

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : For extraction of Iron haematite ore is used. 

Reason (R) : Because haematite is carbonate ore.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : H-S-H bond angle in H\(_2\)S is closer to 90\(^{\circ}\) but H-0-H bond angle in H\(_2O\) is 104.5\(^{\circ}\). 

Reason (R) : \(lp-lp\) repulsion is stronger in \(H_2S\) than in H\(_2O\).

In the light of the above statements, choose the correct answer from the options given below