General Science - Online Test
Q1. Find out the mismatched pair :
Answer : Option D
Explaination / Solution:
Different parts of human brain have specializedarea for different receptors. Visual area is located in occipital lobe. General sensory area are located in parietal lobe, smell area is located in frontal area. Speech area is not located in parietal lobe.
Q2. TFC is not zero at zero level of output as
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. Radio frequency region of the electromagnetic spectrum is used for broadcasting. It is
Answer : Option D
Explaination / Solution:
Radio frequency (RF) is any of the electromagnetic wave frequencies that lie in the range extending from around3 kHz to 300 GHz, which include those frequencies used in radio communication or radar. RF usually refers to electrical rather than mechanical oscillations
Q4.
The electrical resistance in ohms of a certain thermometer varies with temperature according to the approximate law : R =R[1 + (T –T )] The resistance is 101.6 at the triple-point of water 273.16 K, and 165.5 at the normal melting point of lead (600.5 K). What is the temperature when the resistance is 123.4 ?
Answer : Option C
Explaination / Solution:
It is given that:
R = R0 [1 +
R0 and T0 are the initial resistance and temperature respectively
R and T are the final resistance and temperature respectively
is a constant
At the triple point of water, T0 = 273.15 K
Resistance of lead, R0 = 101.6
At normal melting point of lead, T = 600.5 K
Resistance of lead, R = 165.5
Substituting these values in equation (i), we get:
R = Ro [1 + (T – To)]
165.5 = 101.6 [ 1 + (600.5 - 273.15) ]
1.629 = 1 + (327.35)
∴ = 0.629 / 327.35 = 1.92 × 10-3 K-1
For resistance, R1 = 123.4
R1 = R0 [1 + (T – T0)]
where,
T is the temperature when the resistance of lead is 123.4
123.4 = 101.6 [ 1 + 1.92 × 10-3( T - 273.15) ]
Solving for T, we get
T = 384.8 K.
R = R0 [1 +
- (T – T0)] … (i)
R0 and T0 are the initial resistance and temperature respectively
R and T are the final resistance and temperature respectively
is a constant
At the triple point of water, T0 = 273.15 K
Resistance of lead, R0 = 101.6
At normal melting point of lead, T = 600.5 K
Resistance of lead, R = 165.5
Substituting these values in equation (i), we get:
R = Ro [1 + (T – To)]
165.5 = 101.6 [ 1 + (600.5 - 273.15) ]
1.629 = 1 + (327.35)
∴ = 0.629 / 327.35 = 1.92 × 10-3 K-1
For resistance, R1 = 123.4
R1 = R0 [1 + (T – T0)]
where,
T is the temperature when the resistance of lead is 123.4
123.4 = 101.6 [ 1 + 1.92 × 10-3( T - 273.15) ]
Solving for T, we get
T = 384.8 K.
Q5. Chemical species present in the environment are either naturally occurring or generated by human activities. Their interrelation with the surroundings is called :
Answer : Option A
Explaination / Solution:
environmental chemistry basically deals with the interrelationship between chemical species generated by human activities or naturally.
Q6. Which shows maximum magnetic moment among the bivalent ions of the first transition series?
Answer : Option B
Explaination / Solution:
Mn2+ has d5 configuration so maximum no. of un paired electrons.
Q7. Following are the examples of positive correlation except
Answer : Option D
Explaination / Solution:
It is an example of negative correlation because with the rise in temperature the sale of woollen garments will fall.
Q8. Pradhan Mantri Gramodaya Yojana aims at
Answer : Option B
Explaination / Solution:
PMGY was launched in 2000-2001 in all States and Union Territories (UTs) in order to achieve the objective of sustainable human development at the village level. The PMGY envisages allocation of Additional Central Assistance to the States and UTs for selected basic minimum services in order to focus on certain priority areas. PMGY initially had five components viz., primary health, primary education, rural shelter, rural drinking water and nutrition.
Q9. Male and female gametophytes do not have free independent existence in
Answer : Option A
Explaination / Solution:
Unlike bryophytes and pteridophytes , in gymnosperms ( Cedrus )the male and the female gametophytes do not have an independent free-living existence.
Q10. Which one is present nearest to plasmamembrane?
Answer : Option A
Explaination / Solution:
The cell wall of a young plant cell, the primary wallis capable of growth, which gradually diminishes as the cell matures and the secondary wall is formed on the inner (towards membrane) side of the cell.
