CBSE Class 10 Exam Analysis 2023: Science Analysis, Review & Question Paper with Answer Key

CBSE Class 10 Exam Analysis 2023 : Science Analysis, Review & Question Paper with Answer Key

The Central Board of Secondary Education, CBSE Class 10 Science Exam 2023 was conducted today - March 4, 2023. Science was conducted today in the same shift from 10:30 AM to 01:30 PM. As students will get an additional 15 minutes question paper reading time, it was advised that they reach the exam hall as per the reporting time.

Our team reached one of the CBSE examination centres to collect students' response on the difficulty level of today's Science paper. The students who appeared in the exam found the paper lengthy and of moderate difficulty level. Experts also called it a lengthy and balanced paper.

Check the detailed paper analysis below and also download the CBSE Class 10 Science Question Papers in PDF.

CBSE Class 10 Science Question Paper 2023 - Q.P Code : Set - 2 - 31/2/2

CBSE Class 10 Science Question Paper 2023 - Set  - 2 - 31/1/2

CBSE Class 10 Science Question Paper 2023 - 31/2/1

CBSE Class 10 Science Question Paper 2023 - 31/6/3

CBSE Class 10 Science Question Paper 2023 Set - 3 - 31/4/3

CBSE Class 10 Science Question Paper 2023 Set - 2 - 31/5/2

CBSE Class 10 Science Question Paper 2023 - 31/1/1

CBSE Class 10 Science Question Paper 2023 Set - 1 - 31/6/1

CBSE Class 10 Science Question Paper 2023 Set - 2 - 31/4/2

CBSE Class 10 Science Question Paper 2023 - 31/5/1

Science Exam 2023: Question Paper Pattern

Total - 39 Questions

CBSE Science Analysis: "Balanced paper"

The Class 10 Science (086) paper is a balanced one. Students who have studied their NCERT textbook thoroughly will definitely score well. The pattern was similar to the CBSE sample paper and the difficulty level was not very high.

Students' Feedback for CBSE Class 10 Science Exam 2023

CBSE Class 10 students seemed to be satisfied with their today's Science paper. Most of them found the paper to be easy and high scoring. Almost, all the questions were from the syllabus, students informed. Some students found questions from the "Effects of Current" unit a little tricky. General response of the students is shared below:

Difficulty Level of CBSE Class 10 Science Paper - Moderately Easy

Difficult Section of the Paper - 2-3 questions in Section C were tricky

The most Time Consuming Section of the Paper - Question in Sections B and C

Was the Paper Lengthy? The paper was lengthy and required swift thinking along with writing speed

Expected Marks Out of 40 - 30-35 marks on an average

Expert Analysis of CBSE Class 10 Science Exam 2023

Like class 10 students, experts also found the CBSE Class 10 Science paper moderately difficult with having a few Higher Order Thinking Skill type questions. However, experts also mentioned that one having a clear conceptual understanding and thorough knowledge of NCERT would have easily managed to solve all questions. On the good side, nothing in the paper was asked outside the prescribed syllabus and 95% of questions were simple and direct. The paper could have troubled only those who had not read the NCERT book thoroughly.

Answer Key

Class 10 Science Answer Key 2023 Set 1 - 31/6/1

Class 10 Science Answer Key 2023 Set 2 - Set 31/1/2

CBSE Class 10 Science Answer Key 2023 Set – 3

1. When aqueous solutions of potassium iodide and lead nitrate are mixed, an insoluble substance separates out. The chemical equation for the reaction involved is:

(a) KI+PbNO3 –> PbI + KNO3

(b) 2KI+Pb(NO3)2 –> PbI2 + 2KNO3

(c) KI+PbNO3)2 –> PbI + KNO3

(d) KI+PbNO3 –> PbI2 + KNO3

Answer: (b) 2KI+Pb(NO3)2 –> PbI2 + 2KNO3

2. When Sodium bicarbonate reacts with dilute hydrochloric acid, the gas evolved is:

(a) Hydrogen; it gives pop sound with burning match stick.

(b) Hydrogen; it turns lime water milky.

(c) Carbon dioxide; it turns lime water milky.

(d) Carbon dioxide; it blows off a burning match stick with a pop sound.

Answer: (c) Carbon dioxide; it turns lime water milky.

3. Acid present in tomato is:

(a) Methanoic acid

(b) Acetic Acid

(c) Lactic acid

(d) Oxalic acid

Answer: (d) Oxalic acid

4. A metal ribbon ‘X’ burns in oxygen with a dazzling white flame forming a white ash ‘Y’. The correct description of X, Y and the type of reaction is:

(a) X=Ca;Y=CaO; Type of Reaction = Decomposition

(b) X=Mg;Y=MgO; Type of Reaction = Combination

(c) X=Al;Y=Al2O; Type of Reaction = Thermal Decomposition

(d) X=Zn;Y=ZnO; Type of Reaction = Endothermic

Answer: (b) X=Mg;Y=MgO; Type of Reaction = Combination

5. The name of the salt used to remove permanent hardness of water is:

(a) Sodium hydrogen carbonate (NaHCO3)

(b) Sodium chloride (NaCl)

(c) Sodium carbonate decahydrate (Na2CO3.10H20)

(d) Calcium sulphate hemihydrate (CaSO4.1/2H20)

Answer: (c) Sodium carbonate decahydrate (Na2CO3.10H20)

Science Class 10 Answer Key 2023

Section A

Select and write one most appropriate option out of the four options.

• Metal oxides generally react with acids but few oxides of metal also react with bases. Such metallic oxides are-

I. MgO
II. ZnO
III. Al2O3
IV. CaO

a) I and II
b) II and III
c) III and IV
d) I and IV

Answer- b) II and III

• Select the appropriate state symbols of the products given as X and Y in the following chemical equation by choosing the correct option from the table given below-

Zn(S) + H2 SO4 —— ZnSO 4 + H2

(X) (Y)
a) (s) (l)
b) (aq) (g)
c) (aq) (s)
d) (g) (aq)
Answer- b)

• Few drops of an aqueous solution of ammonium chloride are put on a universal indicator paper. The paper turns pink. Study the following table and choose the correct option-

Nature Ammonium Chloride is a salt of Range of pH
a) Acidic weak acid and strong base less than 7
b) Basic weak acid and weak base more than 7
c) Acidic strong acid and weak base less than 7
d) Basic strong acid and strong base 7
Answer- c)

• Two salts “X” and “Y” are dissolved in water separately. When phenolphthalein is added to these two solutions, solution “X” turns pink and solution “Y” does not show any change in colour, therefore “X” and “Y” are-

Answer- a)

• In the given diagram of closed stomata. (1), (2), (3), and (4) respectively are-

a) nucleus, chloroplast, guard cell, vacuole
b) nucleus, chloroplast, vacuole, guard cell
c) chloroplast, nucleus, vacuole, guard cell
d) vacuole, guard cell, nucleus, chloroplast

Correct Answer- b)

•Walking in a straight line and riding a bicycle are activities which are possible due to a part of the brain. Choose the correct location and name of this part from the given table.

Part of the Brain Name
a) Fore Brain Cerebrum
b) Mid Brain Hypothalamus
c) Hind Brain Cerebellum
d) Hind Brain Medulla
Correct Answer- c)

• In an experiment with pen plants, a pure tall plant (TT) is crossed with pure short plant (tt). The ratio of pure tall plant to pure short plant in F2 generation will be

a) 1:3
b) 3:1
c) 1:1
d) 2:1

Answer- c)

• A student wants to obtain an erect image of an object using a concave mirror of 10 cm focal length. What will be the distance of the object from mirror?

a) Less than 10 cm

b) 10 cm

c) between 10 cm and 20 cm

d) more than 20 cm

Correct Answer- a)

• Bronze is an alloy of

a) Copper and Zinc

b) Aluminium and Tin

c) Copper, Tin, and Zinc

d) Copper and Tin

Correct Answer- d)

CBSE Class 10th English (Language & Literature) Question Paper With Answer Key