NEET Chemistry MCQs

A solution is prepared by dissolving 0.5 moles of solute in 250 g of solvent. What is the molality of the solution?

What is the molarity of a solution containing 1 mole of solute in 500 mL of solution?

Two forces $\vec{F_1}$ and $\vec{F_2}$ act on a particle. $\vec{F_1}$ has a magnitude of 10 N and acts along the positive x-axis. $\vec{F_2}$ has a magnitude of 5 N and acts at an angle of 120° with respect to the positive x-axis. If the resultant force $\vec{R}$ makes an angle $heta$ with $\vec{F_1}$, then $an(heta)$ is:

Three coplanar forces $\vec{F_1}$, $\vec{F_2}$, and $\vec{F_3}$ act on a point object such that the object is in equilibrium. If $|\vec{F_1}| = 10$ N, $|\vec{F_2}| = 15$ N and the angle between $\vec{F_1}$ and $\vec{F_2}$ is 60°, then the magnitude of $\vec{F_3}$ is closest to:

Two vectors $\vec{A}$ and $\vec{B}$ have magnitudes A and B respectively. If the magnitude of their resultant vector is $\sqrt{A^2 + B^2 + \sqrt{3}AB}$, which of the following is the most accurate measure of the angle between $\vec{A}$ and $\vec{B}$?

A particle is subjected to three concurrent forces represented by the vectors $\vec{F_1} = 2\hat{i} - \hat{j}$, $\vec{F_2} = \hat{i} + 2\hat{j} - 3\hat{k}$, and $\vec{F_3} = -2\hat{i} + \hat{j} + \hat{k}$. If an additional force $\vec{F_4}$ is required to keep the particle in equilibrium, what is the magnitude of the projection of $\vec{F_4}$ on the vector $\hat{i} - \hat{j} + \hat{k}$?

Two forces, $\vec{P}$ and $\vec{Q}$, act at a point. If the magnitude of their resultant is equal to the magnitude of $\vec{P}$ and perpendicular to $\vec{P}$, and the magnitude of $\vec{Q}$ is $Q$, what is the magnitude of $\vec{P}$?

What is the number of atoms present in 1 mole of oxygen gas?

How many moles are present in 18g of water (H2O)?

What is the mass of one mole of carbon dioxide (CO2)?