Chemistry · Delhi DoE

Practice paper · Mid-term

2025-26Class 1170 marks33 questions

24 of its 33 questions are here. The rest have a figure or are still being checked, so for now they're only in the official PDF.

Sit this paper against the clock, marked by its official answers, or get a new paper like it. Sign in first; practising is part of Pro.

Source: Directorate of Education, Delhi: Class XI (2025-26) · Chemistry (English) · Practice Papers-1, Chemistry, published by Delhi DoE. The official PDF

Download PDF

24 questions

Q1Section A1 mark
$What will be molarity of a solution containing 4g of sodium hydroxide dissolved in 500 mL of water? [Given: Atomic mass of Na = 23u, O = 16u, H = 1u]$
1. A $0.08 M$
2. B $0.1 M$
3. C $0.2 M$
4. D $8.0 M$
Q2Section A1 mark
$The number of significant figures in value of Avogadro number (6.022\times10²³) is/are:$
1. A $1$
2. B $3$
3. C $4$
4. D $23$
Q3Section A1 mark
$The number of angular nodes and radial nodes in 4d orbital respectively are:$
1. A $0, 3$
2. B $2, 0$
3. C $3, 2$
4. D $2, 1$
Q4Section A1 mark
$Consider the following molecules: (I) CO₂ (II) H₂O (III) BF₃ (IV) NH₃ Out of these, molecule(s) polar molecule(s) is/are-$
1. A $I, II, III, IV$
2. B $I, II$
3. C $II, IV$
4. D $IV only$
Q5Section A1 mark
$Which of the following molecule is paramagnetic having bond order two?$
1. A $C₂$
2. B $N₂$
3. C $O₂$
4. D $F₂$
Q6Section A1 mark
$Given reaction may be classified as: H₂O(l) + Cl₂ (g) \to HCl (aq) + HClO(aq)$
1. A $combination reaction$
2. B $precipitation reaction$
3. C $displacement reaction$
4. D $disproportionation reaction$
Q7Section A1 mark
$Which of the following element forms acidic oxide?$
1. A $Li$
2. B $C$
3. C $Al$
4. D $Ca$
Q8Section A1 mark
$If following are moving with the same velocity, highest wavelength will be associated with:$
1. A $Electron$
2. B $Proton$
3. C $α-particle$
4. D $Cricket ball$