TNPSC G2 Previous Year Question Papers General Studies

35260.Projectile motion is a combination of horizontal motion with constant ______ and vertical motion with constant

Acceleration, velocity

Velocity, acceleration

Displacement, velocity

Velocity, displacement

35262.Nuclear force is

charge dependent

spin independent

both charge and spin independent

spin dependent but charge independent

35264.The area of a semi-circle of radius 7 c.m. is

7 cm²

777 cm²

77 cm ²

7777 cm²

Explanation:

Area of semi-circle =$\dfrac{\pi r^{2}}{2}=\dfrac{1}{2}\times\dfrac{22}{7}\times7\times7$

$=77cm^{2}$

35266.The oxidation of SO₃^2- to SO₄^2- ion by oxygen

in this reaction which is Lewis acid and Lewis base?

SO₃^2- is Lewis acid and oxygen is Lewis base

Oxygen is Lewis acid and SO₃^2- is Lewis base

Both are Lewis acids

Both are Lewis bases

35268.Cyanide resistant respiration is found in

Plants only

Animals only

Both plants and animals

Plants and Microbes

35270.Male sex hormone testosterone is produced by

Leydig cells

Sertolicells

Germinalepithelial cells

Spermatogonial cells

35272.Which one of the following is correctly matched?

I. Gregor Mendel	- Neurospora
II. T.H. Morgan	-Drosophila
III. C.B. Bridges	- Garden pea
IV. J.H.Muller	- Mice

I

II

III

IV

35274.Tax is charged on some items which are manufactured in the country. This is collected by the Government of India. This Tax is

Direct Tax

Indirect Tax

Excise Duty

Service Tax

35276.The value of $\dfrac{x^{2}-2x}{x^{2}+2x}$ X $\dfrac{3x+6}{x-2} $

3x

3

3x + 2

x - 2

Explanation:

Take x as common ,$\dfrac{x(x-2)\times3(x+2)}{x(x+2)\times(x-2)}=3$

35278.A boy is now twice as old as his sister, four years ago, he was thrice as old as her what are their ages now?

18, 9

14, 7

16, 8

12, 6

Explanation:

The Boy's age = A
The Sister's age = B
A boy is now twice as old as his sister A=2B
Four years ago, he was thrice as old as her
(A-4) = 3(B-4)
apply A = 2B
2B-4 = 3B-12
3B-2B = 12-4
B=8
A= 2B
A=2(8)
A=16
Boy's age=16 years
Sister's age=8 years

35280.x^3/2 : 9 = 16: $\sqrt{x}$. What is the value of x ?

$\pm$ 16

$\pm$ 3

$\pm$ 4

$\pm$ 12

Explanation:

$\dfrac{x^{\dfrac{3}{2}}}{9}=\dfrac{16}{x^{\dfrac{1}{2}}}$

$x^{\dfrac{3}{2}+\dfrac{1}{2}}=16\times9$

$x^{2}=16\times9$

$x=4\times3=12$

35282.Total surface area of hollow hemisphere is equal to

2 $\pi$(R² + r²) sq. units

2 $\pi$(R² - r²) sq. units

$\pi$(3R² + r²) sq. units

$\pi$(3R² - r²) sq. units

Explanation:

Let R ans r be the outer and inner radii of the hemisphere.

Now,its curved surface area=outer surface area+inner surface area

$2R^{2}\times2r^{2}$

$=2\pi (R^{2}+r^{2})sq.units$

$Total surface area=outer surface area+inner surface area+Area at the base$

$=2\pi R^{2}+2\pi r^{2}+\pi (R^{2}-r^{2})$

$=2\pi (R^{2}+r^{2})+\pi(R+r)(R-r)sq.units$

$=\pi(3R^{2}+r^{2})sq.units$

35284.The probability that a leap year will have 53 Fridays or 53 Saturdays is

$\dfrac{1}{7}$

$\dfrac{2}{7}$

$\dfrac{3}{7}$

$\dfrac{4}{7}$

Explanation:

There is 366 days In leap year
Now
52 weeks * 7 days/week = 364 day
52 full weeks means -> 52 Friday
For remaining 2 days, one of the following pair is possible
(sun,Mon) (Mon,Tue) (Tue,Wed) (Wed,Thu) (Thu,Fri) (Fri,Sat) (Sat,Sun)
Out of 7 pair there is 2 pair in which 53rd Friday may come.
Probability of 53 Friday in a leap year = (Thu,Fri) (Fri,Sat) = 2/7
Out of 7 pair there is 2 pair in which 53rd Saturday may come.
Probability of 53 Saturday in a leap year = (Fri,Sat) (Sat,Sun) = 2/7

$p(AUB)=p(A)+p(B)-p(AnB)$

$\dfrac{2}{7}+\dfrac{2}{7}-\dfrac{1}{7}=\dfrac{3}{7}$

35286.Factorization of (x + y)²+9(x+y)+ 8 is

(x+y+1)(x+y)

(x+y+1)(x+y+8)

(x + y +1)(x + y +6)

(x+y+8)(x+y+2)

Explanation:

$\left(x+y\right)^2+9\left(x+y\right)+8$
$=\left(\left(x+y\right)^2+\left(x+y\right)\right)+\left(8\left(x+y\right)+8\right)$
$=\left(x+y\right)\left(\left(x+y\right)+1\right)+8\left(\left(x+y\right)+1\right)$
$=\left(\left(x+y\right)+1\right)\left(\left(x+y\right)+8\right)$
$=\left(x+y+1\right)\left(x+y+8\right)$

35288.What is the difference between the sum of first n odd natural numbers and that of first n natural numbers?

$\dfrac{n}{2}$ +1

$\dfrac{n(n-1)}{2}$

$\dfrac{n(n+1)}{2}$

$\dfrac{n(n+1)(2n+1}{6}$

Explanation:

$sum of first `n' odd nos=n^{2}$

$sum of first `n' natural nos=\dfrac{n(n+1)}{2}$

$Difference =n^{2}-[\dfrac{n^{2}+n}{2}]^{2}$

$=\dfrac{2 n^{2}-n^{2}-n}{2}$

$=\dfrac{n^{2}-n}{2}$

$=\dfrac{n(n-1)}{2}$

35290.Which of the following is arranged in correct ascending order?

25 of 8, 40% of 6, 30% of 9, 20% of 15

20% of 15, 25% of 8, 30% of 9, 40% of 6

30% of 9, 40% of 6, 25% of 8, 20% of 15

20% of 15, 30% of 9, 40% of 6, 25% of 8

Explanation:

From given options we have to find the answer for this type of questions.
25% of 8=$\dfrac{25}{100}\times 8=2.0$
40% of 6=$\dfrac{40}{100}\times 6=2.4$
30% of 9=$\dfrac{30}{100}\times 9=2.7$
20% of 15 =$\dfrac{20}{100}\times 15=3.0$

35292.Which of the following is larger in area?

A triangle with base 10 cm and height 8 cm

A triangle with sides 12 cm, 5 cm and 13 cm .

An equilateral triangle whose sides are 10 cm each

A right angled triangle whose sides containing the right angle are 3 cm and 4 cm

Explanation:

$a.Area=\frac{1}{2}bh$

$ =\frac{1}{2}\times10\times8$

$=40c m^{2}$

$b.Right angled tiangle=13^{2}=5^{2}+12^{2}$

$ =\frac{1}{2}\times5\times12$

$ =30cm^{2}$

$c.Equilateral triangle=\frac{\sqrt{3}}{4}\times10\times10$

$ =25\sqrt{3}$

$ =25\times1.732$

$=43.3cm^{2}$

$d.Right angled triangle= \frac{1}{2}\times3\times4$

$ =6ccm^{2}$

35294.The arithmetic mean of a group of 75 observations was calculated as 27. It was later found that one observation was wrongly read as 43 instead of the correct value 53. Obtain the correct arithmetic mean of the data.

26.13

27.13

28.13

25.13

Explanation:

Difference=53-43=10 should be increase

New average=27+$\dfrac{10}{75}$

= 27.13

35296.A sum of money triples itself at 8% per annum over certain time. The number of years is equal to

24

25

20

12

Explanation:

n=3 times

$N=\dfrac{(n-1)\times100)}{R}$

$ =\dfrac{(3-1)\times100}{8}$

$ =\dfrac{200}{8}$

$ =25 years$

35298.Match the following :

(a)Annie Besant	1. Kesari
(b) Bipin Chandrapal	2.Common weal
(c) Boopendra Nath Dutt	3. The New Asia
(d) Tillak	3. Yuganthar

3 4 1 2

2 1 4 3

4 3 1 2

2 3 4 1

Total
Attended	0
Correct	0
Incorrect	0

TNPSC G2 Previous Year Question Papers General Studies - 2017

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