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UPSC Civil services Entrance exams General Studies test # General Science Structure of Atom Prepare / Learn

Q1.

Wave number of yellow radiations having wavelength of 5800 $A^{0}$ .

A. 1.72 x

10^{5} m^{- 1}

B. 1.72 x

10^{5} m^{- 1}

C. 1.72 x

10^{2} m^{- 1}

D. 1.72 x

10^{3} m^{- 1}

Answer : Option B
Explaination / Solution:

Wave number is defined as the reciprocal of wavelength.

$\bar{ν} = \frac{1}{λ}$

where, $λ$ = wavelength = 5800 Å = $5.8 \times 10^{- 7} m$

So, $\bar{ν} = \frac{1}{5.8 \times 10^{- 7}} =$ $1.72 \times 10^{6} m^{- 1}$

UPSC Civil services Entrance exams General Studies test # General Science Producer Behaviour and Supply Prepare / Learn

Q2. AVC and AFC always lie below AC because

A. They are convex

B. They are concave

C. Their sum is equal to AC

D. They are always downward sloping

Answer : Option C
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science Thermal Properties of Matter Prepare / Learn

Q3. The triple points of neon is 24.57 K. Express this temperatures on the Celsius and Fahrenheit scales

A. –238.58

^{\circ}

C = – 315.44

^{\circ}

B. –248.58

^{\circ}

C = – 415.44

^{\circ}

C. –218.58

^{\circ}

C = – 335.44

^{\circ}

D. –208.58

^{\circ}

C = – 355.44

^{\circ}

Answer : Option B
Explaination / Solution:

$\begin{aligned} \frac{T_{C} - 0}{100 - 0} = \frac{T_{F} - 32}{212 - 32} = \frac{T_{K} - 273.15}{373.15 - 273.15} \\ \frac{T_{C}}{100} = \frac{T_{F} - 32}{180} = \frac{T_{K} - 273.15}{100} \end{aligned}$

TK = 24.57K

after solving

TC = –248.58 $^{\circ}$ C

TF = – 415.44 $^{\circ}$ F

UPSC Civil services Entrance exams General Studies test # General Science Environmental Chemistry Prepare / Learn

Q4. Sulphur dioxide levels can be reduced by using :

A. More efficient car engines

B. Static electricity to attract it in factory chimneys

C. Low sulphur fuels

D. Catalytic converters

Answer : Option C
Explaination / Solution:

Sulphur dioxide levels can be reduced by using Low sulphur fuels so that less amount of SO2 is produced from them

UPSC Civil services Entrance exams General Studies test # General Science The d- and f- Block Elements Prepare / Learn

Q5. Which chromium compound is widely used in tanning of leather?

C r O_{2} C l_{2}

C r C l_{3}

\begin{array}{l} K_{2} S O_{4} . C r_{2} {(S O_{4})}_{3} .24 H_{2} O \end{array}

C r_{2} O_{3}

Answer : Option C
Explaination / Solution:

K_{2} S O_{4} . C r_{2} {(S O_{4})}_{3} .24 H_{2} O

is used in taaning of leather.

UPSC Civil services Entrance exams General Studies test # General Science Correlation Prepare / Learn

Q6. If the plotted points in the plane are spread all over the diagram, then there is

A. Highly Positive correlation

B. Highly Negative correlation

C. No correlation

D. None

Answer : Option C
Explaination / Solution:

Data points scattered all over the diagram indicate no association between the two variables and hence there is no correlation.

UPSC Civil services Entrance exams General Studies test # General Science Poverty Prepare / Learn

Q7. Which programme has the government adopted to help the elderly people and poor and destitute women

A. National Social Assistance Programme

B. None

C. National Social Awas Programme

D. National Social Awas Product

Answer : Option A
Explaination / Solution:

The National Social Assistance Programme (NSAP) is a Centrally Sponsored Scheme of the Government of India that provides financial assistance to the elderly, widows and persons with disabilities in the form of social pensions.

UPSC Civil services Entrance exams General Studies test # General Science Plant Kingdom Prepare / Learn

Q8. The giant redwood tree is

A. Pinus

B. Cedrus

C. Cycas

D. Sequoia

Answer : Option D
Explaination / Solution:

One of the gymnosperms, Giant sequoias are the world's largest single tree with an average height of 50–85 m (164–279 ft) and 6–8 m (20–26 ft) in diamete

UPSC Civil services Entrance exams General Studies test # General Science Cell The Unit of Life Prepare / Learn

Q9. Elaioplasts belongs to

A. Amyloplast

B. Chromoplast

C. Chloroplast

D. Leucoplast

Answer : Option D
Explaination / Solution:

The leucoplasts are the colourless plastids of varied shapes and sizes with stored nutrients. Leucoplast includes:

a) Amyloplasts storing carbohydrates.

b) Elaioplastsstoring oils and fats and

c) Aleuroplasts storing proteins.

UPSC Civil services Entrance exams General Studies test # General Science Collection of Data Prepare / Learn

Q10. Sampling in which every item of the population has an equal and independent chance of being selected is called

A. Restricted random sampling

B. Random sampling

C. Census

D. Unrestricted random sampling

Answer : Option D
Explaination / Solution:

This method selects unit with equal probability and replacement. Because units are selected with replacement, a unit can be selected for the sample more than once.