Skip to content
TNPSC Guide
தமிழ்EN

Previous-year papers

TNPSC Group 4 2019 question paper with answer key

2019 · G4

Questions 184 to 193 of 200

By TNPSC Guide editorial team · Last updated:

  1. Question 184

    The reaction which takes place at cathode of an electrochemical cell is

    1. A. oxidation
    2. B. neutralisation
    3. C. reduction
    4. D. substitution reaction
    Answer and explanation

    Correct answer: C. reduction

    Final answer key

    Source: Combined Civil Services Examination-IV (Group-IV Services) 2018-2019 and 2019-2020, question booklet CCS4T/19 (booklet code AAA), General Tamil with General Studies, General Studies file (questions 101-200), published with the tentative answer key (CCS4T/19 page 69, question 184; final answer key 28.06.2021, S.No. 184: C)

  2. Question 185

    An example of commonly used Insecticide is

    1. A. Bordeaux mixture
    2. B. 2, 4-Dichloro phenoxy acetic acid
    3. C. Dichloro diphenyl trichloro ethane
    4. D. Arsenic
    Answer and explanation

    Correct answer: C. Dichloro diphenyl trichloro ethane

    Final answer key

    Source: Combined Civil Services Examination-IV (Group-IV Services) 2018-2019 and 2019-2020, question booklet CCS4T/19 (booklet code AAA), General Tamil with General Studies, General Studies file (questions 101-200), published with the tentative answer key (CCS4T/19 page 69, question 185; final answer key 28.06.2021, S.No. 185: C)

  3. Question 186

    Match the following elements with its Latin name : (a) Lead (b) Antimony (c) Tin (d) Potassium 1. Stibium 2. Plumbum 3. Kalium 4. Stannum (a) (b) (c) (d)

    1. A. 1 3 2 4
    2. B. 1 2 3 4
    3. C. 2 1 4 3
    4. D. 4 1 2 3
    Answer and explanation

    Correct answer: C. 2 1 4 3

    Final answer key

    Source: Combined Civil Services Examination-IV (Group-IV Services) 2018-2019 and 2019-2020, question booklet CCS4T/19 (booklet code AAA), General Tamil with General Studies, General Studies file (questions 101-200), published with the tentative answer key (CCS4T/19 page 70, question 186; final answer key 28.06.2021, S.No. 186: C)

  4. Question 187

    If the focal length of a concave lens is 2 m, then the power of the lens is

    1. A. 2 dioptre
    2. B. 1 dioptre
    3. C. 0.5 dioptre
    4. D. – 0.5 dioptre
    Answer and explanation

    Correct answer: D. – 0.5 dioptre

    Final answer key

    Source: Combined Civil Services Examination-IV (Group-IV Services) 2018-2019 and 2019-2020, question booklet CCS4T/19 (booklet code AAA), General Tamil with General Studies, General Studies file (questions 101-200), published with the tentative answer key (CCS4T/19 page 71, question 187; final answer key 28.06.2021, S.No. 187: D)

  5. Question 188

    The maximum temperature in a city on 7 days of a certain week was 34.8°C, 38.5°C, 33.4°C, 34.7°C, 35.8°C, 32.8°C, 34.3°C. Find the mean temperature for the week

    1. A. 34.8°C
    2. B. 34.9°C
    3. C. 34.7°C
    4. D. 35.2°C

    Disputed answer key: no answer is shown

  6. Question 189

    A group of 100 candidates have their average height 163.8 cm with coefficient of variation 3.2. What is the standard deviation of their heights?

    1. A. 3.23
    2. B. 4.91
    3. C. 5.24
    4. D. 6.38
    Answer and explanation

    Correct answer: C. 5.24

    Final answer key

    Source: Combined Civil Services Examination-IV (Group-IV Services) 2018-2019 and 2019-2020, question booklet CCS4T/19 (booklet code AAA), General Tamil with General Studies, General Studies file (questions 101-200), published with the tentative answer key (CCS4T/19 page 72, question 189; final answer key 28.06.2021, S.No. 189: C)

  7. Question 190

    The present ages of Reena and Usha are 24 years and 36 years respectively what was the ratio between the ages of Usha and Reena, 8 years ago?

    1. A. 7 : 4
    2. B. 6 : 5
    3. C. 2 : 3
    4. D. 4 : 7
    Answer and explanation

    Correct answer: A. 7 : 4

    Final answer key

    Source: Combined Civil Services Examination-IV (Group-IV Services) 2018-2019 and 2019-2020, question booklet CCS4T/19 (booklet code AAA), General Tamil with General Studies, General Studies file (questions 101-200), published with the tentative answer key (CCS4T/19 page 72, question 190; final answer key 28.06.2021, S.No. 190: A)

  8. Question 191

    Simplify ((3³)⁻² × (2²)⁻³) / ((2⁴)⁻² × 3⁻⁴ × 4⁻²)

    1. A. 7 2/9
    2. B. 9 2/7
    3. C. 7 1/9
    4. D. 9 1/7
    Answer and explanation

    Correct answer: C. 7 1/9

    Final answer key

    Source: Combined Civil Services Examination-IV (Group-IV Services) 2018-2019 and 2019-2020, question booklet CCS4T/19 (booklet code AAA), General Tamil with General Studies, General Studies file (questions 101-200), published with the tentative answer key (CCS4T/19 page 73, question 191; final answer key 28.06.2021, S.No. 191: C)

  9. Question 192

    The total surface area of cube is 384 m². Find the side of the cube

    1. A. 3 m
    2. B. 8 m
    3. C. 4 m
    4. D. 6 m
    Answer and explanation

    Correct answer: B. 8 m

    Final answer key

    Source: Combined Civil Services Examination-IV (Group-IV Services) 2018-2019 and 2019-2020, question booklet CCS4T/19 (booklet code AAA), General Tamil with General Studies, General Studies file (questions 101-200), published with the tentative answer key (CCS4T/19 page 73, question 192; final answer key 28.06.2021, S.No. 192: B)

  10. Question 193

    Find the LCM of 3(a − 1), 2(a − 1)², (a² − 1)

    1. A. (a + 1)² (a + 1)
    2. B. (a − 1)² (a + 1)
    3. C. 6(a − 1)(a + 1)²
    4. D. 6(a − 1)² (a + 1)
    Answer and explanation

    Correct answer: D. 6(a − 1)² (a + 1)

    Final answer key

    Source: Combined Civil Services Examination-IV (Group-IV Services) 2018-2019 and 2019-2020, question booklet CCS4T/19 (booklet code AAA), General Tamil with General Studies, General Studies file (questions 101-200), published with the tentative answer key (CCS4T/19 page 74, question 193; final answer key 28.06.2021, S.No. 193: D)

Sources