ai test 3 Questions

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion (A): One amu is equal to kg. Reason (R): One amu is the actual mass of one atom of C-12. In the light of the above statements, choose the c

A molal solution is the one that contains one mole of a solute in:

What is the mass of oxygen required for the complete combustion of 2.8 kg of ethylene?

The number of significant figures for the three measurements 161 cm, 0.161 cm, 0.0161 cm are respectively

An element, X has the following isotopic composition: , , The weighted average atomic mass of the naturally occurring element X is closest to

Given below are two statements: Statement-I: Average atomic mass of chlorine is fractional. Statement-II: Average atomic mass is calculated by using natural abundances of different isotopes. In the light of the above statements, choose the most appro

The number of water molecules is maximum in

The number of atoms in 0.1 mole of a triatomic gas is ();

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion (A): Molality and mole fraction concentration units do not change with temperature. Reason (R): The concentration terms, molality and mole

Given below are two statements: Statement-I: 1 mole contains same mass of oxygen and sulphur. Statement-II: 1 mole represents 98 g mass. In the light of the above statements, choose the most appropriate answer from the options given below:

5.85 g NaCl is dissolved in 1 L water. The total number of Na+ and Cl- ions in 1 mL of this solution will be;

The law of multiple proportions is illustrated by the pair of compounds;

Given below are two statements: Statement-I: Avogadro's number is a dimensionless quantity. Statement-II: Avogadro's number is equal to the number of atoms or molecules in one gram mole. In the light of the above statements, choose the correct answer

Consider the following statements. A. 1 mole electrons are equal to electrons. B. The mass of electrons is equal to kg C. Number of particle present in 1 mole of nitrogen atom are Now, choose the correct option

How many significant figures are in 0.0005?

The number of molecules in 1 mL of at STP is;

Equal masses of , and have been taken in a container of volume V at temperature in identical conditions. The ratio of the volumes of gases would be;

Given below are two statements: Statement-I: Vapour density of is half of . Statement-II: 1.6 g of contains same number of electrons as 3.2 g of . In the light of the above statements, choose the most appropriate answer from the options given below:

80 g of oxygen gas contains as many atoms as in;

Common salt obtained from sea-water contains 95% NaCl by mass. The approximate number of molecules present in 10 g salt is;

The correct relation between Fahrenheit scale and Celsius scale is;

The percentage of nitrogen in urea (NH2CONH2), is;

The simplest formula of the compound containing 50% X (atomic mass 10 amu) and 50% Y (atomic mass 20 amu) is;

Which of the following alkanes has 75% of carbon?

Which of the following phrases would be incorrect to use?

How much volume of oxygen will be required for complete combustion of 40 mL of acetylene (C2H2)? (All volume are measured at STP)

Given below are two statements: Statement-I: Screw gauge with a pitch of 0.5 mm is more accurate than 1 mm for same number of circular scale divisions. Statement-II: Higher pitch can make an instrument more accurate. In the light of the above stateme

A screw gauge of pitch 0.5 mm is used to measure the diameter of uniform wire of length 6.8 cm, the main scale reading is 1.5 mm and circular scale reading is 7. The calculated curved surface area of wire to appropriate significant figures is: [Screw

A student performs an experiment to measure the thickness of a slab with a vernier caliper whose 50 divisions of the vernier scale are equal to 49 divisions of the main scale. He noted that zero of the vernier scale is between 7.00 cm and 7.05 cm mar

In a vernier calipers, one main scale division is and division of the vernier scale coincide with division of the main scale. The least count (in cm) of the calipers is:

The period of oscillation of a simple pendulum in the experiment is recorded as 2.63 s, 2.56 s, 2.42 s, 2.71 s and 2.80 s respectively. The average absolute error is:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: If the percentage error in the measurement of radius of the sphere is 0.3%, then the permissible percentage error in its surface area i

If the length of rod A is and that of B is then the rod B is longer than rod A by:

The period of oscillation of a simple pendulum is given by where is 100 cm and is known to have 1 mm accuracy. The time for 100 oscillations of the pendulum is found to be 200 s is measured by a stop watch of least count 0.1 s. The percentage error i

In the density measurement of a cube, the mass and edge length are measured as and , respectively. The relative error in the measurement of density is:

In an experiment, the percentage of error occurred in the measurement of physical quantities A, B, C and D are 1%, 2%, 3% and 4% respectively. Then the maximum percentage error in the measurement of X, where will be:

If L = 2.331 cm, B = 2.1 cm, then L+B=?

The number of significant figures is kg is:

If units of length, mass and pressure are chosen as fundamental units, the dimension of time would be:

The position x of a particle at time “t” is given by Where and a are:

Suppose refractive index µ is given as Where A and B are constants and is the wavelength, then dimensions of B are same as that of:

A force (F), length (L) and time (T) are taken as the fundamental quantities. Then what will be the dimension of density?

The force is given in terms of time t and displacement x by the equation . The dimensional formula of AD/B is:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: Dimensional constants are the quantities whose magnitudes are constant. Reason R: Dimensional constants are always unitless. In the lig

Dimensions of , where T is tension and is mass per unit length, are:

The wavelength associated with a moving particle depends upon pth power of its mass, qth power of its velocity v and rth power of Planck's constant h. Then, the correct set of values of p, q and r is:

If momentum (P), area (A) and time (T) are taken to be fundamental quantities, then the dimensional formula for energy is:

In a vernier calliper, when both jaws touch each other, zero of the vernier scale shift towards left and its 4th division coincides exactly with a certain division on main scale. If 50 vernier scale divisions equal to 49 main scale divisions and zero

The density of a material in SI unit is . In certain units in which the unit of length is 25 cm and the unit of mass is 50 g, the numerical value of density of the material nearly is:

Given below are two statements: Statement-I: In a vernier callipers, one vernier scale division is always smaller than one main scale division. Statement-II: The vernier constant is given by one main scale division multiplied by the number of vernier