General Science - Online Test
Q1. A somatic cell in human male contains
Answer : Option B
Explaination / Solution:
Somatic cells in human male contain 22 pairs of autosomes and 1 pair (XY) of sex chromosome. Y chromosome is smaller in size and do not have allelomorphic pair of X chromosome. So, only one sex-linked gene is available for each character.
Q2. Agriculture by using only biofertilizers is called
Answer : Option C
Explaination / Solution:
Organic farming is the practice of agriculture in which no chemical substance is used as fertilizers, pesticides or insecticides. Biofertilizers are used to provide nutrient.
Q3. Mayank stood still for a long time and he felt swelling of feet. What would you suggest him :
Answer : Option D
Explaination / Solution:
During long hours of standing still swelling of feet is observe due to accumulation of blood in lower limb due to gravitation effect. This can be corrected by jerk or wriggle of legs to restart circulation properly.
Q4. 7.5 MHz to 12 MHz band corresponds to wavelength band of
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. Which of the following has maximum number of lone pairs associated with Xe?
Answer : Option D
Explaination / Solution:
- n XeF2: Xe has 2 of its electrons in bonding with F. So, since Xe has 8 valence electrons, the no.of lone pairs =
- In XeO3: Xe has 6 of its electrons in bonding with O (bcoz of double bond). So, Xe will have 2 non bonding electrons and therefore 1 lone pair.
- In XeF4: Xe has 4 of its electrons in bonding with F. So, Xe will have 4 non bonding electrons and therefore 2 lone pairs.
- In XeF6: Xe has 6 of its electrons in bonding with F. So, Xe will have 2 non bonding electrons and therefore 1 lone pair.
So XeF2 has the maximum no. of lone pairs associated with Xe.
Q6. A rectangular wire loop of sides 8 cm and 2 cm with a small cut is moving out of a region of uniform magnetic field of magnitude 0.3 T directed normal to the loop. What is the emf developed across the cut if the velocity of the loop is 1 cm in a direction normal to the shorter side of the loop? For how long does the induced voltage last ?
Answer : Option A
Explaination / Solution:
duration of |e| is
Q7. In Kreb cycle conversion of succinyl-CoA to succinic acid by
Answer : Option A
Explaination / Solution:
Conversion of Succinyl-CoA to Succinate : Succinyl-CoA, like acetyl-CoA, has a strongly negative free energy of hydrolysis of its thioester bond In the next step of the citric acid cycle, energy released in the breakage of this bond is used to drive the synthesis of a phosphoanhydride bond in either GTP or ATP, and succinate is also formed in the process.
The enzyme that catalyzes this reversible reaction is called either succinyl-CoA synthetase or succinic thiokinase;
Q8. The metal which is inert and when swallowed remains non-toxic but becomes severely toxic when inhaled in volatile form:
Answer : Option A
Explaination / Solution:
Mercury is inert and when swallowed remain non-toxic but becomes severely toxic when inhaled in volatile form. It enters the respiratory system and riches to lungs to cause lung cancer.
Q9. p,p’ – Dichlorodiphenyltrichloroethane is a
Answer : Option C
Explaination / Solution:
p,p’ –Dichlorodiphenyltrichloroethane (DDT) is a colorless, tasteless, and almost odorless known for its pesticidal properties and environmental impacts.
Q10. Given h = 6.6 joule sec, the momentum of each photon in a given radiation is 3.3 kg metre/sec. The frequency of radiation is
Answer : Option C
Explaination / Solution:
λ=hpcν=hpν=pch=3.3×10−29×3×1086.6×10−34=1.5×1013Hz
