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UPSC Civil services Entrance exams General Studies test # General Science Anatomy of Flowering Plants Prepare / Learn

Q1. Which among the following are elongated or tube like cells with thick and lignified walls and tapering ends?

A. Vessels

B. Xylem fibres

C. Xylem parenchyma

D. Tracheids

Answer : Option D
Explaination / Solution:

Tracheids are elongated cells in the xylem of vascular plants that serve in the transport of water and mineral salts. Tracheids are one of two types of tracheary elements, vessel elements being the other.

UPSC Civil services Entrance exams General Studies test # General Science Plant Growth and Development Prepare / Learn

Q2. Auxanometer is used to measure

A. Pest population

B. Leaf number

C. Growth in breadth

D. Growth in length

Answer : Option D
Explaination / Solution:

An auxanometer (Gr. auxain, "to grow" + metron, "measure") is an apparatus for measuring increase or rate of growth in plants.

In case of an arc-auxanometer (see picture), there is a wire fixed with the plant apex on one end and a dead-weight on the other.

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

Q3. Emission line spectrum of atoms contains

A. Only a few colors in the form of isolated sharp parallel lines generally produced by chilled gases

B. All colors in the form of isolated sharp parallel lines generally produced by heated resistances

C. Only a few colors in the form of isolated sharp parallel lines generally produced by heated gases

D. All colors of visible light without sharp boundaries

Answer : Option C
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science The Living World Prepare / Learn

Q4. Sometimes different authors give different names to one and the same species. In such a situation

A. All known names are discarded and a new name is given to the species

B. The name under which the species was first described is valid name

C. The latest name under which the species was described is valid.

D. People can use any one of the names for the species.

Answer : Option B
Explaination / Solution:

In MangiferaindicaLinn, the word ‘Linn’ indicates that this species was first described by Linnaeus. Hence, the correct option is The name under which the species was first described is valid name.

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

Q5. The microscopic domain of physics deals with

A. the constitution and structure of matter at the scales of stars and planets and their interaction with different elementary particles

B. None of these

C. The constitution and structure of matter at the scales of atoms and nuclei and their interaction with different elementary particles

D. the constitution and structure of matter at the scales of atoms and nuclei and their interaction with different bodies on the earth

Answer : Option C
Explaination / Solution:

Microscopic domain includes atomic,molecular and nuclear phenomena. It can be said as the study of matter.It includes the study of structure and configuration of atom,nucleus and the constitute particles of atom-electron,proton,neutron and interaction with elementary particles like electron,photon etc.

UPSC Civil services Entrance exams General Studies test # General Science Organic compounds containing Nitrogen Prepare / Learn

Q6. Hinsberg’s reagent reacts with primary and secondary amines to form sulphonamides. This reagent is also known as

A. N Methylbenzamide

B. None of these

C. Benzenesulphonyl chloride

D. p – toluenesulphonyl chloride

Answer : Option C
Explaination / Solution:

C_{6} H_{5} S O_{2} C l

this is benzenesulphonyl chloride or hinsberg reagent.

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

Q7. Carbon-carbon double bond in alkenes consists of

A. one strong sigma

(σ)

bond due to head-on overlapping of

s p^{3}

hybridised orbitals one weak pi

(π)

bond

B. one weak sigma

(σ)

bond due to head-on overlapping of

s p^{3}

hybridised orbitals one weak pi

(π)

bond

C. one weak sigma

(σ)

bond due to head-on overlapping of

s p^{2}

hybridised orbitals one weak pi

(π)

bond

D. one strong sigma

(σ)

bond due to head-on overlapping of

s p^{3}

hybridised orbitals one weak pi

(π)

bond

Answer : Option A
Explaination / Solution:

sigma bond is formed by head-on overlap of sp2 hybridised orbitals while the pi bond is formed by lateral or sideways overlapping of the two 2p-orbitals of the two carbon atoms. Alkenes contain 1 weak pi bond and 1 strong sigma bond.

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

Q8. Two solutions have different osmotic pressures. The solution of higher osmotic pressure is called

A. Hypotonic solution

B. Hypertonic solution

C. Isotropic solution

D. Isotonic solution

Answer : Option B
Explaination / Solution:

Hypertonic solutions are having high Osmotic Pressure.

UPSC Civil services Entrance exams General Studies test # General Science Indian Economy 1950 to 1990 Prepare / Learn

Q9. Gross Domestic savings as a proportion of GDP has risen from ____ in 1950-51 to ____percent in 1990-91

A. 8.9, 23.1

B. 10, 28

C. 7.4, 22.6

D. 8.5, 34.6

Answer : Option A
Explaination / Solution:

Gross Domestic savings as a proportion of GDP has risen mainly due to the increased contribution of household sector from 6.2 in 1950-51 to 19.3 in 1990-91.

UPSC Civil services Entrance exams General Studies test # General Science Government Budget and the Economy Prepare / Learn

Q10. One of the other two components of government Revenue in the budget are

A. Revenue Expenditure

B. Expenditure receipts

C. Budget receipts

D. Capital receipts