List of practice Questions

"Fitts's law" predicts nearer, wider targets are faster to select than farther, narrower targets. Shown below are parts of two Indian language virtual keyboards X and Y that demonstrate the input of a vowel modifier (matra) in Indian scripts. In each case, the first image shows the initial interface, and the second image shows the interface after the user touches a consonant. In both cases, the user selects the desired vowel modifier by sliding his finger towards it. Which of the statements below is TRUE, as per Fitts’s law?
Shown below are two perspective views of a solid object. The pipe section has three identical cuts on its surface along with three identical flanges. How many surfaces are there?
Osmotic pressure is a colligative property because it
What is the conjugate base of H\(_2\)SO\(_4\)?
Sulphur(s) when react with HNO\(_3\) (conc.) Green mainly gives:
An ant sting contains :
The correct statement regarding electrophile is :
Aquaregia contains 3 parts of concentrated HCl and ____.
When Magnesium (Mg) burn in air, we get Magnesium ____ .
Bleaching powder is obtained by passing chlorine over :
The combustion of carbon monoxide yields carbon dioxide. The volume of oxygen gas needed to produce 22 g of carbon dioxide at STP is
When Z grams of calcium carbonate completely burnt in air gives 28g of a solid compound, the mass of calcium carbonate used will be:
The average energy of a diatomic gaseous molecule at temperature T is $\frac{5}{2} k_B T$. The average energy per degree of freedom is
A straight line having a slope of $-\Delta U^{0}/R$ is obtained in a plot between
How many electrons, protons and neutrons are present in Y\(^+\), if atomic number of Y is 19 and mass number of Y is 39 :
Which among the following is the lightest particle :
An element with atomic number 20 will be placed in which period of the periodic table :
A cylinder rolls up an inclined plane, reaches some height and then rolls down (without slipping throughout these motions). The directions of the frictional force acting on the cylinder are
A solid cylinder is attached to a horizontal massless spring as shown in figure. If the cylinder rolls without slipping, the time period of oscillation of the cylinder is
A solid cylinder is attached to a horizontal massless spring as shown in figure
The displacement of a particle along the x-axis is given by \(x=a sin^2ω\). The motion of the particle corresponds to
What will be the displacement equation of the simple harmonic motion obtained by combining the motions? Given: \[ x_1 = 2 \sin(\omega t), \quad x_2 = 4 \sin(\omega t + \frac{\pi}{2}), \quad x_3 = 6 \sin(\omega t) \]
Two soap bubble coalesce. It is noticed that, whilst joined together, the radii of the two bubbles are a and b where a>b. Then the radius of curvature of interface between the two bubbles will be
If the temperature of a liquid is raised, then its surface tension is _____
If three sides of a rectangular park have a total length 400 ft, then the area of the park is maximum when the length (in ft) of its longer side is
A rocket is intended to leave the Earth's gravitational field. The fuel in tis main engine is a little less than the amount that is necessary and an auxiliary engine, (only capable of operating for a short time) has to be used as well. When is it best to switch on the auxiliary engine?