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The Central Board of Secondary Education has released the Class 12 Chemistry Additional Practice Questions Paper 2023-24 for all students of Class 12 who have chosen science as their major stream. The official website to download and practice the Class 12 Chemistry Additional Practice Questions Paper 2023-24 (CBSE) is www.cbseacademic.nic.in. The Students preparing for the class 12th chemistry exam must download and practice the CBSE Chemistry Additional Practice Questions Paper 2023-24. As these practice papers will help them to understand and familiarize themselves with the newly updated format of the Class 12th Board exams. Students can click on the direct PDF link provided below to download the entire Additional Practice Questions Paper 2023-24 for Class 12 Chemistry subject.
Class 12 Chemistry Additional Practice Questions Paper 2023-24 (CBSE)
CBSE Board has also released the blueprint and marking scheme for the Class 12 Chemistry Board Exam 2023-24. The question paper of the class 12 chemistry exam is divided into five sections with 35 questions for 70 marks. The CBSE Class 12 Chemistry Additional Practice Questions Paper 2023-24 is also designed board exam point of view, which is similar to your board exam pattern. The complete exam pattern that has been followed is as follows-
There are 33 questions in the Class 12 chemistry question paper with internal choice.
- There will be 18 Multiple-choice Questions carrying 01 mark each in Section A.
- 07 Very Short Answer Questions carrying 2 marks each in Section B.
- 05 Short Answer Questions carrying 03 marks each in Section C.
- 02 Case-Based Questions carrying 04 marks each in Section D.
- 02 Long Anser Questions carrying 05 marks each in Section E.
Chemistry Class 12 Additional Practice Question Paper 2023-24 PDF
The students who are revising their class 12 chemistry topics for their upcoming CBSE Class 12 Chemistry Board Exam should download the official Practice question paper PDF along with its solution from the below link. We have provided the complete Chemistry Class 12 Additional Practice Question Paper 2023-24 Download link and the solutions PDF link for the convenience of candidates.
| Chemistry Class 12 Additional Practice Question Paper 2023-24 Download PDF | |
| Additional Practice Question Paper | Solution PDF |
| Chemistry Class 12 Additional Practice Question Paper 2023-24 | Solution Link |
CBSE Class 12 Chemistry Additional Practice Questions Paper 2023-24 with Solutions
Science stream students who are preparing for their board exams should take a chance to attempt to solve these questions by themselves and cross-check with the solutions provided to score well in their real-time exams.
Q1. Sunita set up three cells as shown below:
She applied external potential in all three cells. The potential is increased slowly, till the opposing voltage reaches the value of 1.1 V.
Which of the following statements is INCORRECT?
(a) Electrons flow from the Zn rod to the Cu rod hence current flows from Cu to Zn in case (P).
(b) The chemical reaction takes place in case (Q) till the opposing voltage reaches 1.1 V.
(c) Zinc is deposited at the zinc electrode and copper dissolves at the copper electrode in case (P).
(d) Electrons flow from Cu to Zn and current flows from Zn to Cu in case (R).
Ans. (c) Zinc is deposited at the zinc electrode and copper dissolves at the copper electrode in case (P).
Q2. Two compounds M and N have the general formula CnH2nO but different structural formulae.
i) Compound N belongs to that homologous series where the first member contains 3
carbon atoms.
ii) Compound M reacts with one equivalent of monohydric alcohol in the presence of
dry hydrogen chloride to yield a hemiacetal.
Identify the homologous series to which compounds M and N belong to.
(a) Both the compounds are aldehydes.
(b) Compound M is an aldehyde and compound N is a ketone.
(c) Both the compounds are ketones.
(d) Compound N is an aldehyde and compound M is a ketone.
Ans. (b) Compound M is an aldehyde and compound N is a ketone.
Q3. What will be the change in the hybridization of C when a nucleophile attacks the electrophilic center of the carbonyl group?
(a) sp2 to sp
(b) sp3 to sp2
(c) sp3 to sp
(d) sp2 to sp3
Ans. (d) sp2 to sp3
Q4. Four compounds, CH3Cl, CH3Br, C2H5Br, and C3H7I are represented by the letters M, N, O, and P in the table below (in random order). The boiling points are also given in the table.
| Boiling Points of various compounds | ||||
| Boiling points(BP) | -24.2°C | 38°C | 3.56°C | 101.6°C |
| Compound | M | N | O | P |
Which of the four compounds does ‘N’ most likely represent?
(a) CH3Cl
(b) CH3Br
(c) C2H5Br
(d) C3H7I
Ans. (c) C2H5Br
Q5. Sampriti took 4 acids. Help her to arrange the acids from left to right, in the increasing
order of their acidity:
2, 4, 6 – Trinitrophenol, acetic acid, phenol, and benzoic acid.
(a) 2, 4, 6 – Trinitrophenol, acetic acid, benzoic acid, phenol
(b) phenol, acetic acid, benzoic acid, 2, 4, 6 – Trinitrophenol
(c) 2, 4, 6 – Trinitrophenol, benzoic acid, acetic acid, phenol
(d) phenol, benzoic acid, acetic acid, 2, 4, 6 – Trinitrophenol
Ans. (b) phenol, acetic acid, benzoic acid, 2, 4, 6 – Trinitrophenol
Q6. Study the graph given below.
Based on the graph given, which element will MOST LIKELY be involved in the following reaction?
Metal + conc. sulphuric acid → Metal sulphate + sulphur dioxide + water
(a) Cu
(b) Co
(c) Ti
(d) Zn
Ans: (a) Cu
Q7. The table given below shows the results of three experiments on the rate of the reaction between compounds P and Q at a constant temperature.
Based on the data, what will be the rate equation for the reaction between P and Q?
(a) k[P]²[Q]
(b) k[P][Q]²
(c) k[P][Q]
(d) k[P]
Ans: (a) k[P]²[Q]
Q8. The table below shows the KH values for some gasses at 293 K and at the same pressure.
In which of the following are the gases arranged in their decreasing order of solubility (from left to right)?
(a) Helium > Nitrogen > Hydrogen > Oxygen
(b) Hydrogen > Helium > Nitrogen > Oxygen
(c) Nitrogen > Hydrogen > Oxygen > Helium
(d) Oxygen > Hydrogen > Nitrogen > Helium
Ans: (d) Oxygen > Hydrogen > Nitrogen > Helium
Q9. Sampriti took 4 acids. Help her to arrange the acids from left to right, in the increasing
order of their acidity: 2, 4, 6 – Trinitrophenol, acetic acid, phenol, and benzoic acid.
(a) 2, 4, 6 – Trinitrophenol, acetic acid, benzoic acid, phenol
(b) phenol, acetic acid, benzoic acid, 2, 4, 6 – Trinitrophenol
(c) 2, 4, 6 – Trinitrophenol, benzoic acid, acetic acid, phenol
(d) phenol, benzoic acid, acetic acid, 2, 4, 6 – Trinitrophenol
Ans: (b) phenol, acetic acid, benzoic acid, 2, 4, 6 – Trinitrophenol
Q10. An archeologist found that the percentage of carbon-14 in a wooden artifact was 20% of what carbon-14 would have been in the wood when it was cut from the tree.
What would be the approximate age of this wooden artifact?
(Given the half-life of carbon-14= 5730 years)
(a) 5,790 years
(b) 12,060 years
(c) 13,300 years
(d) 38,000 years
Ans: (c) 13,300 years
CBSE Class 12 Biology Additional Practic...
