MALIK BASHIR AHMAD FREE SCIENCE ACADEMY
Full book Che-10th
Question no 1: Multiple Choice Questions (MCQs)
1. Which of the following is a strong acid?
a) Acetic acid
b) Hydrochloric acid
c) Citric acid
d) Carbonic acid
2. The general formula for alkanes is:
a) CₙH₂ₙ₊₂
b) CₙH₂ₙ
c) CₙH₂ₙ₋₂
d) CₙH₂ₙ₊₁
3. Which process is used to separate petroleum into its components?
a) Filtration
b) Distillation
c) Crystallization
d) Chromatography
4. The most abundant gas in the Earth's atmosphere is:
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Argon
5. Which element is essential for the formation of hemoglobin in blood?
a) Calcium
b) Iron
c) Magnesium
d) Potassium
6. The functional group present in carboxylic acids is:
a) –COOH
b) –CHO
c) –OH
d) –NH₂
7. Which of the following is an example of a non-renewable energy source?
a) Solar energy
b) Wind energy
c) Natural gas
d) Hydroelectric energy
8. The chemical formula of glucose is:
a) C₆H₁₂O₆
b) C₆H₁₂O₅
c) C₆H₁₀O₅
d) C₆H₁₄O₆
9. Which gas is commonly used in the ripening of fruits?
a) Ethylene
[12 Marks]
b) Methane
c) Propane
d) Butane
10. The process of converting unsaturated fats to saturated fats by adding hydrogen is called:
a) Saponification
b) Hydrogenation
c) Esterification
d) Polymerization
11. Which of the following is a primary pollutant?
a) Ozone
b) Sulfur dioxide
c) Nitric acid
d) Peroxyacetyl nitrate
12. The main constituent of natural gas is:
a) Ethane
b) Propane
c) Butane
d) Methane
Question no 2: Short Questions
1.
(10 Marks)
What do you mean by the extent of a reaction?
2. Why the reversible reactions do not go to completion?
3. Why is equilibrium state attainable from either way?
4. Why pure water is not a strong electrolyte?
5. How insoluble salts are prepared.
6. Write the formula and uses of calcium chlorite and sodium chlorate.
7. Difference between saturated and unsaturated hydrocarbons.
8. Why the burning of alkanes require sufficient supply of oxygen?
Question no 3: Short Questions
(10 Marks)
1. Define isomerism with an example.
2. Write important conditions to exhibit catenation
3. Why are the organic compounds poor conductors of electricity?
4. How hydrolysis of sucrose is carried out?
5. How are amino acids bonded with each other?
6. Why are the flood risks are increasing?
7. How is aquatic life affected by acid rain?
8. Why is ozone depleting in atmosphere?
Question no 4: Short Questions
1. Which salts are responsible for hardness of water?
(10 Marks)
2. How clarke’s method is carried out?
3. What is the principle of removing permanent hardness of water?
4. What do you know about water borne diseases. Name any five water
borne diseases.
5.
6.
7.
8.
How is CO2 prepared in the Solvay’s process?
What is slag and matte.
What is principle of fractional distillation?
What do you mean by residual oil. In how many fractions, residual oil is
separated?
Long Questions
Q 5:
a. What is the pH scale? Explain its importance and applications.
b. Write classification of organic compounds
Q 6:
a) Write a note on halogenation of alkanes.
b) Write a note on DNA.
Q7:
a) Write effects of acid rain
b) Write a detailed note on electrolytic refining of copper
(18 Marks]