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UPSC Civil services Entrance exams General Studies test # General Science Inflation: Problem and Policies Prepare / Learn

Q1. Cost push inflation occurs when

A. Price rises due to rise in the cost of production

B. There is an excess of demand for goods over their supply

C. None

D. Both

Answer : Option A
Explaination / Solution:

Cost push inflation develops because the increase in the costs of production cause the aggregate supply in the economy to decrease while aggregate demand remains the same. The result is therefore an increase in the general price level.

UPSC Civil services Entrance exams General Studies test # General Science Motion in A Straight Line Prepare / Learn

Q2. Path length is a

A. tensor

B. scalar

C. vector

D. Derived unit

Answer : Option B
Explaination / Solution:

Path length has no particular direction and it depends upon the path chosen to reach the destination where displacement of the destination is absolute no matter what path is used to get there. So it is scaler.

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

Q3. The electric field of a plane electromagnetic wave travelling in +ve z direction is described by

A. Ex=E0sin(kz+ωt)

B. Ex=E0sin(2kz)

C. Ex=E0sin(kz-ωt)

D. Ex=E0sin(kz)

Answer : Option C
Explaination / Solution:
No Explaination.

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

Q4. Rh incompatibility develops when :

A. foetus is Rh-ve and father is Rh+ve

B. foetus is Rh-ve and mother is Rh+ve

C. foetus is Rh+ve and mother is Rh-ve

D. foetus is Rh+ve and mother is Rh-ve

Answer : Option C
Explaination / Solution:

A special case of Rh incompatibility (mismatching) has been observed between the Rh-ve blood of a pregnant mother with Rh+ve blood of the foetus.

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

Q5. Matter waves are useful in

A. explaining gravitational phenomenon

B. explaining quantum mechanical phenomenon

C. explaining tidal wave phenomenon

D. explaining astronomical phenomenon

Answer : Option B
Explaination / Solution:

Matter waves are also termed as De Broglie waves because they were initially introduced by him. All matters behave like a wave (during motion) and in there propagation there is action of forces due to collision between the particles, some time torque also exists, hence all the matters waves were consider to be a helpful part for understanding quantum.

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

Q6. Who is regarded as the father of genetics?

A. Mendel

B. Morgan

C. Watson

D. Bateson

Answer : Option A
Explaination / Solution:

Mendel is regarded as the father of genetics due to his initial law of inheritance given by him on the basis of Hybridisation conducted by him on garden pea.

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

Q7. Pasture effect can be studied in case of

A. Pencillium

B. Pinnularia

C. Sccharomyces

D. Nostoc

Answer : Option C
Explaination / Solution:

Reduction in consumption of respiratory substrate when the mode of respiration is changed from aerobic to anaerobic is called pasture effect. It is studied in case of Sccharmomyces.

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

Q8.

The formation of sodium chloride involves two half reaction, which clearly show involvement of electrons.
2 $Na (s) \to 2 Na + (g) + 2e$
$C l_{2} (g) + 2e \to 2 Cl (g)$
Sum of the half reactions gives
$2 Na (s) + C l_{2} (g) \to 2 Na + Cl (s) or 2 NaCl (s)$
In terms of electron-transfer change, name the oxidising agent(s) and reducing agent(s)

A. reducing agents:Chlorine, oxygen and oxidising agents:sodium and sulphur

B. oxidising agents:Chlorine, oxygen and reducing agents:sodium and sulphur

C. Oxidising agent: Chlorine and Reducing agent: Sodium

D. reducing agents:Chlorine, oxygen and sulphur and oxidising agent:sodium

Answer : Option C
Explaination / Solution:

According to the modern concept, loss of electrons is oxidation whereas gain of electrons is reduction.Redox reaction involves two half reactions, one involving loss of electron or electrons (oxidation) and the other involving gain of electrons or electrons (reduction)

Oxidizing agent is a species which can gain one or more electrons.
Reducing agent is a species which can lose one or more electrons.

In the given reaction Sodium(Na) is loosing 2 electrons, thus it is the reducing agent. Chlorine(Cl) is gaining 2 electrons , thus it is oxidising agent.

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

Q9. One of the following is not called alkaline earth metal.

A. Strontium

B. radium.

C. barium

D. beryllium,

Answer : Option D
Explaination / Solution:

Alkaline earth metals are called so because of two reasons

Alkaline earth metals are obtained on earth in the form of ores
Oxides and hydroxides of Alkaline earth metals are basic in nature,

However Beryllium fulfills 1st reason but its oxides and hydroxides are amphoteric so sometimes they say it is not alkaline earth metal. but as it is amphoteric IUPAC has accepted this as alkaline earth metal

UPSC Civil services Entrance exams General Studies test # General Science Organic Chemistry Some Basic Principles and Techniques Prepare / Learn

Q10. Write the state of hybridisation of carbon in