CBSE Academic Class X Science Sample Question Paper 2022-23
Name of the Board : Central Board of Secondary Education (CBSE)
Class : X STD
Document Type : Sample Question Paper
Subject : Science
Year : 2022-23
Website : https://cbseacademic.nic.in/SQP_CLASSX_2022-23.html
CBSE X Science Question Paper
CBSE Students can download the Science Sample Question Paper for the year 2022-23 from the website of CBSE Academic.
Related / Similar Question Paper : CBSE Academic Class X Elements Of Book Keeping And Accountancy Sample Question Paper 2022-23
CBSE Science Sample Question Paper
1 The change in colour of the moist litmus paper in the given set up is due to
i. presence of acid
ii. presence of base
iii. presence of H⁺(aq) in the solution
iv. presence of Litmus which acts as an indicator
(a) i and ii
(b) Only ii
(c) Only iii
(d) Only iv.
2 In the redox reaction MnO2 + 4HCl → MnCl2 + 2H2O + Cl2
(a) MnO2 is reduced to MnCl2& HCl is oxidized to H2O
(b) MnO2 is reduced to MnCl2& HCl is oxidized to Cl2
(c) MnO2 is oxidized to MnCl2 & HCl is reduced to Cl2
(d) MnO2 is oxidized to MnCl2 & HCl is reduced to H2O
Which of the following is the correct observation of the reaction shown in the above set up?
(a) Brown powder of Magnesium oxide is formed.
(b) Colourless gas which turns lime water milky is evolved.
(c) Magnesium ribbon burns with brilliant white light.
(d) Reddish brown gas with a smell of burning Sulphur has evolved.
5 On placing a copper coin in a test tube containing green ferrous sulphate solution, it will be observed that the ferrous sulphate solution
(a) turns blue, and a grey substance is deposited on the copper coin.
(b) turns colourless and a grey substance is deposited on the copper coin.
(c) turns colourless and a reddish–brown substance is deposited on the copper coin.
(d) remains green with no change in the copper coin.
6 Anita added a drop each of diluted acetic acid and diluted hydrochloric acid on pH paper and compared the colors. Which of the following is the correct conclusion?
(a) pH of acetic acid is more than that of hydrochloric acid.
(b) pH of acetic acid is less than that of hydrochloric acid.
(c) Acetic acid dissociates completely in aqueous solution.
(d) Acetic acid is a strong acid
7 The formulae of four organic compounds are shown below. Choose the correct option 1
(a) A and B are unsaturated hydrocarbons
(b) C and D are saturated hydrocarbons
(c) Addition of hydrogen in presence of catalyst changes A to C
(d) Addition of potassium permanganate changes B to D
8 In the given transverse section of the leaf identify the layer of cells where maximum photosynthesis occurs.
(a) I, II
(b) II, III
(c) III, IV
(d) I, IV
9 Observe the experimental setup shown below. Name the chemical indicated as ‘X’ that can absorb the gas which is evolved as a byproduct of respiration.
(a) NaOH
(b) KOH
(c) Ca (OH)2
(d) K2CO3
10 If a tall pea plant is crossed with a pure dwarf pea plant then, what percentage of F1 and F2 generation respectively will be tall?
(a) 25%, 25%
(b) 50%, 50%
(c) 75%,100%
(d) 100%, 75%
11 Observe the three figures given below. Which of the following depicts tropic movements appropriately?
(a) B and C
(b) A and C
(c) B only
(d) C only
12 The diagram shown below depicts pollination. Choose the options that will show a maximum variation in the offspring.
(a) A, B and C
(b) B and D
(c) B, C and D
(d) A and C
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