Chemistry · Delhi DoE

Practice paper · Paper 1

2023-24Class 1170 marks33 questions

26 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.

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Source: Directorate of Education, Delhi: Class XI (2023-24) · Chemistry · Practice Papers-1, Chemistry, published by Delhi DoE. The official PDF

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26 questions

Q1Section A1 mark
$An organic compound contains C, H and N atoms in ratio 9 : 1 : 3.5 by weight. If its molar mass is 108 g mol-1, molecular formula will be:$
1. A $C6H8N2$
2. B $C7H10N$
3. C $C5H6N3$
4. D $C4H18N3$
Q2Section A1 mark
$5 moles of AB2 weighs 125 g and 10 moles of A2B2 weighs 300 g. The molar mass of A and B (in g mol-1) respectively are:$
1. A $10, 5$
2. B $50, 25$
3. C $25, 50$
4. D $5, 10$
Q3Section A1 mark
$The number of angular nodes and radial nodes in 3d orbital respectively are:$
1. A $0, 3$
2. B $2, 0$
3. C $3, 2$
4. D $2, 1$
Q4Section A1 mark
$Consider the following molecules: (I) CO2 (II) H2O (III) BF3 (IV) NH3 Out of these, molecule(s) having sp3 hybridization of central atom is/are-$
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 $F2$
Q7Section A1 mark
$For an isolated system,$
1. A $∆U = 0, ∆S = 0$
2. B $∆U = 0, ∆S > 0$
3. C $∆U > 0, ∆S < 0$
4. D $∆U < 0, ∆S = 0$
Q9Section A1 mark
$The best suitable method (sequence of reactions) to convert benzene into p-Chlorotoluene is:$
1. A $1. CH3Cl / anhydrous AlCl3 2. CH4 / H+$
2. B $1. Cl2 / anhydrous AlCl3 2. CH3Cl / anhydrous AlCl3$
3. C $1. CH3Cl / anhydrous AlCl3 2. Cl2 / anhydrous AlCl3$
4. D $1. CH3Cl / H+ 2. conc. HCl$
Q10Section A1 mark
$The major product formed on reaction of 1-Methylcyclohex-1-ene with water in presence of dilute H2SO4 will be:$
1. A $1-Methylcyclohexan-1-ol$
2. B $2-Methylcyclohexan-1-ol$
3. C $1-Methylcyclohex-2-ene$
4. D $1-Methylcyclohexane$