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UPSC Civil services Entrance exams General Studies test # General Science Forms of Market and Price Determination Prepare / Learn

Q1. Price taker firms

A. Do not advertise their products because it misleads the customers

B. Advertise their products to boost the level of demand

C. Do not advertise because they can sell as much as they wish at the prevailing price

D. Do not advertise but give gifts along with the sold items to attract customers

Answer : Option C
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science Botany-Principles of Inheritance and Variation Prepare / Learn

Q2. XO type of sex determination is found in

A. Elephant

B. Dog

C. Grasshopper

D. Human beings

Answer : Option C
Explaination / Solution:

In grasshopper, sex determination is of XO type, in which the males have only one X-chromosome besides the autosomes whereas females have a pair of X-chromosome.

UPSC Civil services Entrance exams General Studies test # General Science Microbes in Human Welfare Prepare / Learn

Q3. What is the common name of Drosophila melanogaster?

A. Roundworm

B. Zebrafish

C. Chlamydia

D. Fruit fly

Answer : Option D
Explaination / Solution:

Drosophila melanogaster is a species of fly (the taxonomic order Diptera) in the family Drosophilidae. The species is known generally as the common fruit fly or vinegar fly. A number of experiments related to inheritance of trait were carried out on this small fly.

UPSC Civil services Entrance exams General Studies test # General Science Body Fluids and Circulation Prepare / Learn

Q4. Match the following:

column A
a)Waller
b) Landsteiner
c) de castello and Steini
d) Landsteiner and Weiner

column B
i) rhesus antigen
ii) first ECG
iii) A, B and O blood group
iv) AB blood group

A. a)-iv, b)-i, c)-ii, d)-iii

B. a)-iii, b)-i, c)-ii, d)-iv

C. a)-ii, b)-iii, c)-iv, d) i

D. a)-i, b)-iii, c)-iv, d)-ii

Answer : Option C
Explaination / Solution:

Waller performed first ECG. Landsteiner and Weiner discovered rhesus antigen (Rh). De castello and Steini shows the AB blood grouping and Landsteiner A,B,O blood grouping.

UPSC Civil services Entrance exams General Studies test # General Science Chemical Bonding and Molecular Structure Prepare / Learn

Q5. When

O_{2}

is converted into

{O_{2}}^{+}

A. paramagnetic character decreases and the bond order increases

B. both paramagnetic character and bond order increase

C. paramagnetic character increases

D. bond order decreases

Answer : Option A
Explaination / Solution:

Bond order = $\frac{N_{b} - N_{a}}{2}$

For O2 = $\frac{10 - 6}{2}$ = 2

For O2+ = $\frac{10 - 5}{2}$ = 2.5

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

Q6. An air-cored solenoid with length 30 cm, area of cross-section 25

c m^{2}

and number of turns 500, carries a current of 2.5 A. The current is suddenly switched off in a brief time of

1 0^{- 3}

s. Average back emf induced across the ends of the open switch in the circuit is

A. 6.5 V .

B. 5.5 V

C. 7.5 V

D. 4.5 V

Answer : Option A
Explaination / Solution:

ϕ=NBA=μ0N2Ail|e|=dϕdt

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

Q7. Use the formula

λ_{m}

T = 0.29 cmK to obtain the characteristic temperature range for

λ_{m} = 5 \times 1 0^{- 7}

A. 7500 K

B. 6500 K

C. 6000 K

D. 7000 K

Answer : Option C
Explaination / Solution:
No Explaination.

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

Q8. Which of the following will be able to cope with greenhouse effect

A. Homeotherms

B. Hibernators

C. Poikilotherms

D. Stenotherms

Answer : Option A
Explaination / Solution:

Greenhouse effect causes increase in temperature of earth. Warm-blooded animal species can maintain a body temperature higher than their environment. In particular, homeothermic species maintain a stable body temperature by regulating metabolic processes. The only known homeotherms are birds and mammals. Homeotherms can tolerate high temperature. So, homeotherms will be able to cope with the effect of green house effect.

UPSC Civil services Entrance exams General Studies test # General Science Respiration in Plants Prepare / Learn

Q9. Net gain of ATP molecules per hexose during aerobic respiration is

A. 18

B. 12

C. 30

D. 36

Answer : Option D
Explaination / Solution:

Each glucose (hexose) during complete oxidation or aerobic respiration produce net 36 ATP molecules, which is produced in form of NADPH and FADH. Each NADPH produce 3 ATP and FADH two ATP molecules.

UPSC Civil services Entrance exams General Studies test # General Science Haloalkanes and Haloarenes Prepare / Learn

Q10. A hydrocarbon C5H10 does not react with chlorine in dark but gives a single monochloro compound