Class 11 Chemistry Practice Questions

Q1. The number of electrons in the outermost shell of sodium (Na) is: 🧪

1. 8
2. 2
3. 11
4. 1

Q2. Which type of bond is formed by sharing of electrons? 🧪

1. Ionic bond
2. Hydrogen bond
3. Metallic bond
4. Covalent bond

Q3. At STP, the volume of one mole of any ideal gas is: 🧪

1. 22.4 L
2. 44.8 L
3. 11.2 L
4. 8.314 L

Q4. Which of the following is an example of a noble gas? 🧪

1. Oxygen
2. Chlorine
3. Nitrogen
4. Argon

Q5. The atomic number of carbon is: 🧪

1. 4
2. 8
3. 6
4. 12

Q6. According to Boyle's Law, at constant temperature, pressure and volume are: 🧪

1. Directly proportional
2. Inversely proportional
3. Unrelated
4. Equal

Q7. Which subshell has a maximum of 10 electrons? 🧪

1. s
2. f
3. d
4. p

Q8. The shape of a water (H₂O) molecule is: 🧪

1. Linear
2. Trigonal planar
3. Bent or V-shaped
4. Tetrahedral

Q9. Avogadro's number is approximately: 🧪

1. 3.011 × 10²³
2. 1.602 × 10⁻¹⁹
3. 6.022 × 10²³
4. 6.022 × 10²¹

Q10. Which state of matter has a definite volume but no definite shape? 🧪

1. Plasma
2. Liquid
3. Gas
4. Solid

Q11. What is the atomic number of this element? Hydrogen

1. 1
2. 2
3. 3
4. 0

Q12. What is the atomic number of this element? Carbon

1. 12
2. 6
3. 8
4. 4

Q13. What is the atomic number of this element? Oxygen

1. 16
2. 6
3. 8
4. 4

Q14. What is the chemical symbol of this element? Sodium

1. So
2. Sd
3. Nu
4. Na

Q15. What is the chemical symbol of this element? Potassium

1. K
2. Po
3. Pt
4. Ka

Q16. What is the pH of a neutral solution at 25°C?

1. 0
2. 7
3. 14
4. 1

Q17. Which is the most electronegative element?

1. Oxygen
2. Chlorine
3. Fluorine
4. Nitrogen

Q18. What is the approximate value of Avogadro's number (in ×10²³)?

1. 3.14
2. 1.602
3. 9.81
4. 6.022