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CBSE class 10th Term 1 Science Answer Key 2021-22

CBSE class 10th Term 1 Science Answer Key 2021-22: The Central Board of Secondary Education or often abbreviated as the CBSE soon began holding exams for Class 10th term 1. It is to be noted that only Multiple-choice questions will be used in the CBSE class 10th Term 1 Science Answer Key 2021-22.  In this article, we have provided the answer key of the Science board exam of CBSE Class 10 2021-22 and students who had appeared for the exam can check their answers through this article itself.

Check CBSE Term 1 Class 10 SST Answer Keys

CBSE 10th Term 1 Science Answer Key 2021 Overview

CBSE 10th Term 1 Answer Key 2021 Overview
Country India
Organization CBSE or Central Board of Secondary Examination
Exam Class 10 (Term 1)
Answer Key Check here
Exam Conducted On 30 November 2021
Examination Subject Social Science
Official Website cbse.gov.in

CBSE class 10 Term 1 Science exam 2022: Answer key

For the first time, the Central Board of Secondary Education is using Class 10 Science Answer keys to administer board exams this year. Because this is the first time OMR sheets have been utilised in board exams, students must only use a black or blue point pen to darken the correct selection. According to the Central Board of Secondary Education, using pencils to mark answers is not permitted during tests. The OMR sheet will be pre-filled with the candidates’ information, and students will just need to write a Question Paper Code. In the upper right corner of the sheet, there is also a spot for the Question Paper Code, which will be extracted from the Question Paper Code printed on the Question Paper.

CBSE Board Class 10 Science Exam Question Paper 2021

Download Full PDF of Class 10 Science Question Paper

CBSE board Class 10 Science exam answers key 2021

Science Class 10 Answer Key 2021-22
Q1- C Q11- D Q21- C Q31- A Q41- B Q51- B
Q2- A Q12- A Q22- B Q32- D Q42- B Q52- C
Q3- D Q13- C Q23- C Q33- B Q43- D Q53- C
Q4- B Q14- B Q24- C Q34- C Q44- B Q54- C
Q5- C Q15- A Q25- D Q35- A Q45- D Q55- A
Q6- C Q16- C Q26- C Q36- B Q46- D Q56- C
Q7- C Q17- A Q27- D Q37- B Q47- C Q57- B
Q8- D  Q18- C Q28- A Q38- C Q48- B Q58- D
Q9- D  Q19- B Q29- B Q39- C Q49- B Q59- B
Q10- C  Q20- B Q30- D Q40- D Q50- D Q60- B

 

CBSE Answer Key 2021 Class 10 Science 2021-for paper code 22(031/2/4)

CBSE_Term_1_Science_paper 2021-22

Question No. Answer Key Question No. Answer Key Question No. Answer Key Question No. Answer Key
1 c 16 d 31 c 46 c
2 a 17 a 32 c 47 b
3 d 18 b 33 d 48 d
4 d 19 c 34 b 49 d
5 a 20 d 35 a 50 c
6 b 21 c 36 a 51 b
7 b 22 c 37 d 52 a
8 a 23 b 38 d 53 b
9 d 24 b 39 b 54 a
10 c 25 a 40 c 55 c
11 b 26 c 41 c 56 a
12 a 27 d 42 b 57 a
13 a 28 b 43 d 58 b
14 a 29 c 44 c 59 d
15 c 30 c 45 d 60 c

CBSE board Science exam answers key 2021 Class 10: Evaluation

What if a student has attempted more questions than the assigned number of questions in the CBSE Term 1 board exams? The firsts will be taken into account. Class 10 Science Answer keys had stated that evaluators will take into account questions numbered 1 through 50. The evaluation can either be taking the total number of questions to be attempted into account. Students’ extra efforts (question numbers 51 to 60 or additional questions completed) will not be taken into account.

CBSE Class 10 Science Answer Key Term 1: Questions and Answers

Q. C6H12O6 (aq) + 6O2 (aq) → 6CO2 (aq) + 6 H2O (l)

The above reaction is a/an

(a) displacement reaction

(b) endothermic reaction

(c) exothermic reaction

(d) neutralisation reaction

Answer- (c) Exothermic reaction 

Q. Which of the following statements about the reaction given below are correct? 

MnO2 + 4HCI → MnCl2 + 2H2O + Cl2

(i) HCl is oxidized to Cl2
(ii) Mn02 is reduced to MnCl2
(iii) MnCl2 acts as an oxidizing agent
(iv) HCl acts as on oxidizing agent

(a) (ii), (iii) and (iv)

(b) (i), (ii) and (iii)

(c) (i) and (ii) only

(d) (iii) and (iv) only

Answer- (c)

Q. Select from the following the statement which is true for bases. 

(a) Bases are bitter and turn blue litmus red.

(b) Bases have a pH less than 7. 

(c) Bases are sour and change red litmus to blue.

(d) Bases turn pink when a drop of phenolphthalein is added to them

Answer- (d)

Q- Study the following table and choose the correct option:

Option Salt Parent Acid Parent Base  Nature of Salt
(a) Sodium Chloride HCl NaOH Basic
(b) Sodium Carbonate H2CO3 NaOH Neutral
(c) Sodium Sulphate H2So4 NaOH Acidic
(d) Sodium Acetate CH2COOH NaOH Basic

Answer- (d)

Q. A student took Sodium Sulphate solution in a test tube and added Barium Chloride solution to it. He observed that an insoluble substance has formed. The colour and molecular formula of the insoluble substance is : 

(a) Grey, Ba,504

(b) Yellow, Ba(S02)

(c) White, BaSO4

(d) Pink, BaSO4

Answer- (c)- White, BaSO4

Q. Which of the following oxide(s) is/are soluble in water to form alkalies? 

(i) Na2O (ii) SO2 (iii) K20 (iv) NO2

(a) (i) and (iii)

(b) (i) only

(c) (ii) and (iv)

(d) (iii) only

Answer- (a) Na2O & K2O

Q. Identify the gas formed in the reaction. 

(a) Carbon di-oxide which extinguishes the burning candle.

(b) Oxygen due to which the candle burns more brightly.

(c) Sulphur dioxide which produces a suffocating smell.

(d) Hydrogen which while burning produces a popping sound

Answer (d)

Q. Sodium reacts with water to form sodium hydroxide and hydrogen gas. The balanced equation which represents the above reaction is; 

(a) Na(s) + 2H2​O(l)→2NaOH(aq)+2H2​(g)

(b) 2Na(s)+2H2​O(l)→2NaOH(aq)+H2​(g)

(c) 2Na(s)+2H2​O(l)→NaOH(aq)+2H2​(g)

(d) 2Na(s)+H2​O(l)→2NaOH(aq)+2H2​(g)

Answer (b)

Q. Which of the options in the given table are correct?

Option Natural Source Acid Present
(i) Orange Oxalic Acid
(ii) Sour Milk Lactic Acid
(iii) Ant Sting Methanoic Acid
(iv) Tamarind Acetic Acid

(a) (i) and (ii)

(b) (i) and (iv)

(c) (ii) and (iii)

(d) (iii) and (iv)

Answer- (c) 

 

FAQs on CBSE Class 10th Term 1 Answer Key 2021-22

How did the 10th-grade students manage to pass this year?

Based on their success in the school’s several assessments/tests/exams throughout the academic year, the CBSE promoted Class 10 students.

In the year 2021, who was the top CBSE tenth-grade student?

Nitya Tripathy, Abhinav Mishra, and Goral Mashru scored 99.6% (498/500) on the CBSE Class 10 board exams in 2021.

What is the name of the tenth grade in the United States?

It is referred to as sophomore year in the United States.

What is the name of the tenth grade in India?

The tenth grade is also known as the Secondary School Certificate, or SSC, or Matriculation examination.

What exactly does CBSE stand for?

The Central Board of Secondary Education is abbreviated as CBSE.

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