List of practice Questions

The oxidation number of chlorine in $ \text{Cl}_2 \text{O} $ is:
What is the molar concentration of hydrogen ions in a solution of $ 0.1 \, \text{M} $ $ \text{HCl} $?
Which of the following gases has the highest density at STP?
Find the sum of the roots of the quadratic equation $ 2x^2 - 5x + 3 = 0 $.

A 5 $\Omega$ resistor and a 10 $\Omega$ resistor are connected in parallel. What is the equivalent resistance of the combination?

A body of mass $ 1.5 \, \text{kg} $ is dropped from a height of $ 20 \, \text{m} $. What is its speed just before hitting the ground? (Assume $ g = 9.8 \, \text{m/s}^2 $)
A car travels at a speed of $ 72 \, \text{km/h} $. What is the car's speed in meters per second?
What is the molar mass of sulfur dioxide (SO$_2)$?
Which of the following is the correct order of increasing acidity for the following compounds? $ \text{CH}_3\text{OH} $, $ \text{CH}_3\text{COOH} $, $ \text{HCl} $, and $ \text{H}_2\text{SO}_4 $.
What is the pH of a 0.001 M solution of hydrochloric acid (HCl)?
Which of the following is the correct electron configuration for an oxygen atom?
What is the empirical formula of glucose, whose molecular formula is $ \text{C}_6\text{H}_{12}\text{O}_6 $?
How many grams of NaOH are required to neutralize 25 mL of 0.1 M HCl solution?
Find the value of $ \log_2 32 $.
What is the difference between ‘velocity’ and ‘drift velocity’ of electrons in a current-carrying conductor.
Mijbil the Otter is portrayed as an intelligent, friendly, and playful animal who thrives on affection. Discuss how these traits are depicted in the story 'Mijbil the Otter' by Gavin Maxwell.
A ray of light is incident on a refracting face AB of a prism ABC at an angle of \( 45^\circ \). The ray emerges from face AC and the angle of deviation is \( 15^\circ \). The angle of prism is \( 30^\circ \). Show that the emergent ray is normal to the face AC from which it emerges out. Find the refraction index of the material of the prism.
A particle of charge \( q \) is moving with a velocity \( \vec{v} \) at a distance \( d \) from a long straight wire carrying a current \( I \) as shown in the figure. At this instant, it is subjected to a uniform electric field \( \vec{E} \) such that the particle keeps moving undeviated. In terms of unit vectors \( \hat{i}, \hat{j}, \) and \( \hat{k} \), find:
the magnetic field \( \vec{B} \),
the magnetic force \( \vec{F}_m \), and
the electric field \( \vec{E} \) acting on the charge.
A particle of charge q q is moving with a velocity v v at a distance d d
A car of mass 800 kg is moving in a circular path with a radius of 50 m at a speed of 20 m/s. Calculate the centripetal force acting on the car.
A 5-ohm resistor is connected to a 10 V battery. Calculate the current flowing through the resistor.
What is the pH of a 0.001 M hydrochloric acid (HCl) solution?
How many grams of sodium chloride (NaCl) are produced when 2.0 moles of sodium (Na) react with excess chlorine gas (Cl\(_2\)? The balanced chemical equation for the reaction is: \[ 2 \, \text{Na} (s) + \text{Cl}_2 (g) \rightarrow 2 \, \text{NaCl} (s) \]
A gas occupies a volume of 5.0 L at 300 K and 1.0 atm pressure. What will be the volume of the gas if the pressure is increased to 2.0 atm while the temperature is kept constant?
For a reaction A \(\rightarrow\) B, the rate law is given by: \[ \text{Rate} = k[\text{A}]^2 \] If the concentration of A is increased by a factor of 3, by what factor does the rate of the reaction increase?

Which of the following is responsible for the production of oxygen during photosynthesis? 
A. Calvin cycle 
B. Photolysis of water 
C. Cyclic photophosphorylation 
D. Reduction of NADP+