General Science - Online Test
Q1. Some notable questions should be borne in mind while dealing with the secondary data except
Answer : Option D
Explaination / Solution:
Because an investigator will not want a data full of pitfall and dificulties.
Q2. India supports approximately _____ per cent of the world’s human and ______ per cent of livestock population on a mere 2.5 per cent of the world’s geographical area
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a ‘‘triplet’’?
Answer : Option D
Explaination / Solution:
The Nirenberg and Matthaei experiment was a scientific experiment performed on May 15, 1961, by Marshall W. Nirenberg and his post doctoral fellow, J. Heinrich Matthaei. The experiment deciphered the first of the 64 triplet codons in the genetic code by using nucleic acid homopolymers to translate specific amino acids and discovered that genetic code is triplet
Q4. A power transmission line feeds input power at 2300 V to a step-down transformer with its primary windings having 4000 turns. Number of turns in the secondary in order to get output power at 230 V is
Answer : Option B
Explaination / Solution:
Np = no. of turns in primary coil = 4000
Ns = no. of turns in primary coil
Vp = input voltage = 2300 V
Vs = output voltage = 230 V
Q5. Resistance of a conductor is
Answer : Option B
Explaination / Solution:
According to Ohm’s law, V=I R. Therefore R=V/I
Q6. A spring with spring constant k when stretched through 1 cm has a potential energy U. If it is stretched by 4 cm, the potential energy will become
Answer : Option A
Explaination / Solution:
No Explaination.
Q7. Calgon is used in
Answer : Option D
Explaination / Solution:
Calgon is a process of removing permanant hardness of water. Calgon is a complex salt, Sodium hexametaphospahte Na(PO3)6 or Na6P6O18 .It acts as a ion exchange resin. It is used for softening of water.When hard water containing Ca and Mg ions is reacted with Calgon, it displaces these ions with Sodium ion, by forming a complex with itself and thus the water becomes free of these ions which cause hardness.
Q8. The process of growing whole plants from explant is called
Answer : Option A
Explaination / Solution:
The process of growing whole plants form any part of plant (explant) is called tissue culture. In this process part of plant is grown in test tube under sterile condition in special nutrient.
Q9. For distances much greater than Fresnel distance ZF
Answer : Option B
Explaination / Solution:
No Explaination.
Q10. the magnetic needle has magnetic moment d moment of inertia . It performs 10 complete oscillations in 6.70 s. Magnitude of the magnetic field is
Answer : Option D
Explaination / Solution:
No Explaination.
