List of practice Questions

Why is benzene extra ordinarily stable though it contains three double bonds?
State which of the following situations are possible and give an example for each of these: 
  1. an object with a constant acceleration but with zero velocity 
  2. an object moving with an acceleration but with uniform speed. 
  3. an object moving in a certain direction with an acceleration in the perpendicular direction.
Gravitational force on the surface of the moon is only \(\frac{1}6\) as strong as gravitational force on the earth. What is the weight in newtons of a 10 kg object on the moon and on the earth?
An artificial satellite is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.
Calculate the hydrogen ion concentration in the following biological fluids whose pH are given below: 
(a) Human muscle-fluid,6.83 
(b) Human stomach fluid,1.2 
(c) Human blood,7.38 
(d) Human saliva,6.4
Make a comparison and write down ways in which plant cells are different from animal cells.
Write IUPAC names of the following compounds:
IUPAC names of the following compounds
The ionization constant of propanoic acid is 1.32 × 10–5. Calculate the degree of ionization of the acid in its 0.05M solution and also its pH. What will be its degree of ionization if the solution is 0.01M in HCl also?
The pH of milk, black coffee, tomato juice, lemon juice and egg white are 6.8, 5.0, 4.2, 2.2 and 7.8 respectively. Calculate corresponding hydrogen ion concentration in each.
If 0.561 g of KOH is dissolved in water to give 200 mL of solution at 298 K. Calculate the concentrations of potassium, hydrogen and hydroxyl ions. What is its pH?
The solubility of Sr(OH)2 at 298 K is 19.23 g/L of solution. Calculate the concentrations of strontium and hydroxyl ions and the pH of the solution.
The pH of 0.1M solution of cyanic acid (HCNO) is 2.34. Calculate the ionization constant of the acid and its degree of ionization in the solution.
The ionization constant of nitrous acid is 4.5 × 10–4. Calculate the pH of 0.04 M sodium nitrite solution and also its degree of hydrolysis.
How is a prokaryotic cell different from a eukaryotic cell?
Define the term “tissue”.
What would happen if the plasma membrane ruptures or breaks down?
A 0.02M solution of pyridinium hydrochloride has pH = 3.44. Calculate the ionization constant of pyridine.
How many types of elements together make up the xylem tissue? Name them.
Predict if the solutions of the following salts are neutral, acidic or basic: NaCl, KBr, NaCN, NH4NO3, NaNO2 and KF
What would happen to the life of a cell if there was no Golgi apparatus?
Factorise : (i) x3 – 2x 2 – x + 2 (ii) x 3 – 3x 2 – 9x – 5 (iii) x 3 + 13x 2 + 32x + 20 (iv) 2y 3 + y 2 – 2y – 1.
Fluorine reacts with ice and results in the change:
\(H_2O(s) + F_2{(g)} \rightarrow HF{(g)} + HOF{(g)}\) Justify that this reaction is a redox reaction.
Which organelle is known as the powerhouse of the cell? Why?
The ionization constant of chloroacetic acid is 1.35 × 10–3. What will be the pH of 0.1M acid and its 0.1M sodium salt solution?
Write the formulae for the following compounds: 
(a) Mercury (II) chloride (b) Nickel (II) sulphate 
(c) Tin (IV) oxide (d) Thallium (I) sulphate 
(e) Iron (III) sulphate (f) Chromium (III) oxide