General Science - Online Test
Q1. A truck is coming towards you from a distance of 1000m on a straight road at time t=0. At time t=10 seconds it is at a distance of 900 m. The average velocity in m/sec is
Answer : Option C
Explaination / Solution:
Initial distance x1 = 1000m
Initial time t1= 0 sec
Final distance x2 = 900 m
Final time t2 = 10 sec
Average velocity
=
Q2. Is AR = price
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. Velocity of sound in air is 300 m/s. Then the distance between two successive nodes of a stationary wave of frequency 1000 Hz is.
Answer : Option A
Explaination / Solution:
No Explaination.
Q4. The pairs of chromosomes present in human beings somatic cells are
Answer : Option C
Explaination / Solution:
In human beings 23 pairs of chromosomes are present out of which 22 pairs are called autosomes and 1 pair is called sex chromosome.
Q5. Rotenone is
Answer : Option C
Explaination / Solution:
Rotenone is a naturally occurring chemical with insecticidal properties, obtained from the roots of the several tropical and subtropical plant species.
Q6.
What physical quantity is the same for X-rays of wavelength m, red light of wavelength 6800A and radio waves of wavelength 500m?
Answer : Option C
Explaination / Solution:
No Explaination.
Q7. The cardiovascular centre is located in :
Answer : Option A
Explaination / Solution:
The cardiovascular centre is a part of the human brain responsible for the regulation of the rate at which the heart beats through the nervous and endocrine systems. It is found in the medulla oblongata.
Q8. The maximum number of hydrogen bonds that a molecule of water can have is
Answer : Option B
Explaination / Solution:
The two hydrogens of the water molecule can form hydrogen bonds with other oxygens in water, and the two lone pair of electrons on oxygen of the water molecule can attract other hydrogens in water. Hence, 4 possible hydrogen bonds.
Q9. Aerobic respiration is common in
Answer : Option D
Explaination / Solution:
Aerobic respiration is the process that leads to a complete oxidation of organic substances in the presence of oxygen, and releases carbon dioxide, water and a large amount of energy present in the substrate. This type of respiration is most common in higher organisms.
Q10. Use Lenz’s law to determine the direction of induced current in the situations described by the Figure (a) A wire of irregular shape turning into a circular shape; (b) A circular loop being deformed into a narrow straight wire. The directions for (a) and (b) respectively are
Answer : Option C
Explaination / Solution:
(a) for a given Periphery the area of a circle is maximum. When a coil takes a circular shape, the magnetic flux linked with the coil increases, so the current induced in the coil will tend to decrease the flux and so it will produce a magnetic field upward. As a result the current induced in the coil will flow in anticlockwise direction.
(b) When circular coil takes the shape of narrow straight wire, The magnetic flux linked with the coil decreases. So the current induced in the coil will tend to oppose the decrease in magnetic flux. Hence it will produce an upward magnetic field so that the current induced in the coil will flow in anticlockwise direction.
