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UPSC Civil services Entrance exams General Studies test # General Science Some Basic Concepts of Chemistry Prepare / Learn

Q1. The gram molar mass of

C O_{2}

A. 88 g

B. 46 g

C. 44 g

D. 78 g

Answer : Option C
Explaination / Solution:

Molar mass of CO2 = $Σ$ (atomic mass of C , 2*atomic mass of O )

= [12+2(16)] u

Since , gram molar mass

= Molar mass expressed in gms .

$∴$ gram molar mass of CO2

= 44 g

UPSC Civil services Entrance exams General Studies test # General Science Consumers Equilibrium and Demand Prepare / Learn

Q2. Which of the following is not true?

A. Two indifference curve can be tangent to each other

B. Indifference curves slopes downward to the right

C. Indifference curves are convex to the origin

D. Indifference curves cannot intersect each other

Answer : Option A
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science System of Particles and Rotational Motion Prepare / Learn

Q3. A uniform rod of mass 2 kg is 1 meter long. Its radius of gyration about an axis through its one end and perpendicular to its length in SI units is

A. 2 /

\sqrt

(3)

C. 1 /

\sqrt

(3)

D. 1/ 2

\sqrt

(3)

Answer : Option C
Explaination / Solution:

Moment of inertia of rod about an axis through its one end and perpendicular to its length

$I = M L 2 3$ M = 2 KgL = 1 mMoment of inertia of rod in terms of radius of gyrationI = Mk2 $M L 2 3 = M k 2 k = L 2 3 - - - \sqrt = L 3 - \sqrt = 1 3 - \sqrt$

UPSC Civil services Entrance exams General Studies test # General Science Mechanical Properties of Fluids Prepare / Learn

Q4. Two small drops of mercury, each of radius r, form a single large drop. The ratio of surface energy before and after this change is

A. 1:2

^{1 / 3}

B. 1:2

C. 2

^{1 / 3}

D. 2:1

Answer : Option A
Explaination / Solution:

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

Q5. Which of the following is thermally the most stable?

H_{2} T e

H_{2} S e

H_{2} S

H_{2} O

Answer : Option D
Explaination / Solution:

Stability of hydrides decreases down the group so most stable is

H_{2} O

UPSC Civil services Entrance exams General Studies test # General Science Structural Organisation in Animals Prepare / Learn

Q6. Intercalated discs occurs

A. In striped muscles

B. Between cardiac muscle fibres

C. At the junction of muscle and nerve cells

D. Between neurons

Answer : Option B
Explaination / Solution:

Intercalated discs are microscopic identifying features of cardiac muscles fibres. Individual heart muscle cells are connected by intercalated discs to work as a single functional organ.

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

Q7. The body of fungus is filamentous and it is called

A. Filament

B. Mycelium

C. Steepened

D. Hyphae

Answer : Option B
Explaination / Solution:

The body of filamentous fungus is known as mycelium, which is a thread like structure. Mycelium produces hyphae and sporegenous cells to produce spores.

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

Q8. Osmotic pressure cannot became zero in a cell. It is zero only in case of

A. Pure water

B. Tap water

C. Sugar saturated water

D. Salt saturated water

Answer : Option A
Explaination / Solution:

Osmotic pressure cannot become zero in cell as it always content some amount of solute particles. Osmotic pressure is zero only in case of pure water or distilled water.

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

Q9. The correct IUPAC name of the following alkane is

A. 3,6 – Diethyl – 2 – methyloctane

B. 5 – Isopropyl – 3 – ethyloctane

C. 3 – Isopropyl – 6 – ethyloctane

D. 3 – Ethyl – 5 – isopropyloctane

Answer : Option A
Explaination / Solution:

Following the rules of nomenclature,the IUPAC name of the given compound is 3,6-Diethyl-2-methyloctane

UPSC Civil services Entrance exams General Studies test # General Science Economic Reforms Since 1991 Prepare / Learn

Q10. Sale tax and excise duty are examples of

A. Indirect tax

B. None

C. Direct tax

D. Both

Answer : Option A
Explaination / Solution:

Sales tax and excise duty are examples of indirect taxes as these are to be paid by the producers or sellers of the commodity but the ultimate burden of the tax rests on the customer.