Science Class 10 Answer Key 2021-22
Science Class 10 Answer Key 2021-22: CBSE has concluded the Class 10 Science Exam today at 1 pm and the students, as well as their parents, must be eager to know the level of performance of their kid in today's Class 10 Science Term-1 Exam. As the pattern for conducting the board exams is new this time and students have to attempt 50 MCQs out of 60 questions and only the first 20 questions of Section A & B and the first 10 questions of Section C will be considered for evaluation. Here, we have provided Science Class 10 Answer Key for Term-1 Exam.
Science Answer Key Class 10th Term-1
In this article, we have provided all the questions asked in the Science Class 10 Term-1 Exam along with the solved Answer Key of Science Class 10 to help the students and their parents calculate the marks that can be scored in the Term-1 Exam. The Science Class 10 Exam is divided into three sections with 60 questions out of which students have to appear for 50 questions (mandatory), for which the pattern decided by CBSE is as follows:
1. Section A will have 24 questions and candidates have to attempt any 20 questions.
2. Section B will have 24 questions and students have to attempt any 20 questions.
3. Section C will have 12 questions and students have to attempt any 10 questions.
Class 10 Science MCQ Answer Key & Paper
The Science MCQ asked in today's exam is provided below along with their correct responses under this section, check the questions you have attempted today and sum up the marks you can score.
Q1. 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)2
(c) White, BaSO4
(d) Pink, BaSO4
Answer- (c)- White, BaSO4
Q2. 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
Q3. Study the diagram given below and 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
Q4. Sodium reacts with water to form sodium hydroxide and hydrogen gas. The balanced equation which represents the above reaction is;
(a) Na(s) + 2H2O(l)→2NaOH(aq)+2H2(g)
Q5. Which of the options in the given table are correct?
|Option||Natural Source||Acid Present|
|(ii)||Sour Milk||Lactic Acid|
|(iii)||Ant Sting||Methanoic Acid|
(a) (i) and (ii)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (iii) and (iv)
Q6. 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
Q7. 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
Q8. 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
Q9- Study the following table and choose the correct option:
|Option||Salt||Parent Acid||Parent Base||Nature of Salt|
Science Class 10 MCQ Answer Key 2021-22
The Science Answer Key for all questions will be updated here soon-
|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 Class 10 Science Answer Key 2021-22
CBSE may release the CBSE Board exam answer keys after all Class 10 Term-1 Exams are over. However, in the meantime, the students can refer to the unofficial CBSE Answer Key 2021 which will be released by experts. To get the accurate and detailed Class 10 Science Answer key for today's Science Class 10 Term-1 Exam, bookmark this page as we will be providing all questions with their correct answers here.
Students should also revise well before their Maths Examination with CBSE Class 10 Maths sample paper as it can be really beneficial for the exam on 04th December 2021.