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

Q1. Dihydrogen under certain reaction conditions, combines with almost all elements to form binary compounds, called hydrides except with few which are given below Choose one of the options

A. transition elements

B. alkali metals

C. p-block elements

D. noble gases,

Answer : Option D
Explaination / Solution:

Noble gases are inert and have high ionisation enthalpy. Hence, they do not form any hydrides.

UPSC Civil services Entrance exams General Studies test # General Science Strategies for Enhancement in Food Production Prepare / Learn

Q2. Which of the following variety of wheat is resistant to leaf and strip rust and hill bunt disease?

A. IR-78

B. Kalian sona

C. Sonalika

D. Himgiri

Answer : Option D
Explaination / Solution:

Himgiri wheat variety is resistant to disease like leaf and strip rust and hill bunt disease that cause great loss of productivity due to loss of plant parts.

UPSC Civil services Entrance exams General Studies test # General Science Magnetism and Matter Prepare / Learn

Q3. magnetic declination and dip refer to

A. angle between longitudinal magnetic axis and latitdinal geographic axis,angle up or down with respect to horizontal of a magnetic needle

B. angle between magnetic axis and geographic axis,angle up or down with respect to horizontal of a magnetic needle

C. angle between magnetic axis and geographic axis,angle up or down with respect to longitude of a magnetic needle

D. angle between latitude of magnetic axis and geographic axis,angle up or down with respect to horizontal of a magnetic needle

Answer : Option B
Explaination / Solution:
No Explaination.

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

Q4. What is the coordination number of chromium in [Cr(NH3)2(H2O2)2]Cl3?

A. 5

B. 6

C. 3

D. 4

Answer : Option D
Explaination / Solution:

There are 4 ligands attachted so CN= 4.

UPSC Civil services Entrance exams General Studies test # General Science Biodiversity and Conservation Prepare / Learn

Q5. Tropical Botanical garden and research institute is situated at

A. Andra Pradesh

B. Shimla

C. Meghalaya

D. Tiruvananthapuram

Answer : Option D
Explaination / Solution:

Tropical Botanic Garden and Research Institute (TBGRI) is an autonomous institute established by the Government of Kerala in 1979 at Thiruvanantapuram, Kerala.

The institute conducts research in Conservation Biology, Biotechnology, Plant Taxonomy, Microbiology, Phytopharmocology, Ethnomedicine and Ethopharmacology for plant improvement and utilisation.

TBGRI also undertakes research on medicinal plants, ornamental plants and various introduced plants of economic or aesthetic value. The institute conserves the largest number of plant species among the botanical gardens in Asia

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

Q6. In Cavendish’s experiment,

A. net force on bar AB having two small lead spheres due to gravitational forces is negative

B. net torque on bar AB having two small lead spheres due to gravitational forces is positive

C. net force on bar AB having two small lead spheres due to gravitational forces is positive

D. torque on bar AB having two small lead spheres due to gravitational forces is balanced by the restoring torque of the wire

Answer : Option D
Explaination / Solution:

Cavendish's apparatus for experimentally determining the value of G involved a light, rigid rod about 2-feet long. Two small lead spheres were attached to the ends of the rod and the rod was suspended by a thin wire. When the rod becomes twisted, the torsion of the wire begins to exert a torsional force that is proportional to the angle of rotation of the rod. The more twist of the wire, the more the system pushes backwards to restore itself towards the original position.

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

Q7. When measuring conductivity with a conductivity cell, cell constant denoted by the symbol G* is given by (electrode area of cross section equal to ‘A’ and separated by distance ‘l’)

Answer : Option C
Explaination / Solution:

Cell constant = length of electrodes/ Area of electrodes.

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

Q8. in p-type semiconductor the dopant is

A. always germanium

B. always silicon

C. donor

D. acceptor

Answer : Option D
Explaination / Solution:

The term p-type refers to the positive charge of the hole. In p-type semiconductors, holes are the majority carriers and electrons are the minority carriers. P-type semiconductors are created by doping an intrinsic semiconductor with acceptor impurities (or doping an n-type semiconductor).

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

Q9. When ___________, the firms are earning just normal profit:

A. AC=AR

B. MC=MR

C. AR=MR

D. MC=AC

Answer : Option A
Explaination / Solution:
No Explaination.

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

Q10. Which of the following have notochord throughout life?

A. Amphioxus

B. Fish

C. Snake

D. Buds

Answer : Option A
Explaination / Solution:

Amphioxus or lancelets are fish like marine chordates found in shallow temperate and tropical seas. They have notochord through out their life.