General Science - Online Test
Q1. Each cardiac cycle takes 0.8 seconds to occur. Calculate how many cardiac cycles occur in 4 minutes ?
Answer : Option C
Explaination / Solution:
4 min = 240 sec. Therefore, 240/0.8 = 300 cardiac cycles.
Q2. In electron transport system, the two copper centres are found in
Answer : Option C
Explaination / Solution:
The enzyme cytochrome c oxidase or Complex IV,is a large transmembrane protein complex found in bacteria and the mitochondrion of eukaryotes.
The complex contains two hemes, a cytochrome a and cytochrome a3, and two copper centers, the CuA and CuB centers. The cytochrome a3 and CuB form a binuclear center that is the site of oxygen reduction.
Q3. Polarity in a molecule and hence the dipole moment depends primarily on electronegativity of the constituent atoms and shape of a molecule. Which of the following has the highest dipole moment?
Answer : Option C
Explaination / Solution:
CO2 is linear, so even though the C−O bonds have individual dipole moments, the overall dipole moment is zero as these cancel out (they point in opposite directions, as shown in the diagram below).
On the other hand, H2O is "bent", which means that the individual dipole moments of the bond are at an angle to each other and because of Presence of lp on head of O atom in H2O therefore it has max dipole moment.
Q4. Predict the polarity of the capacitor in the situation described by fig.
Answer : Option B
Explaination / Solution:
A will become positive with respect to B because current indused is in clockwise direction
Q5. Planck’s constant has the dimensions of
Answer : Option B
Explaination / Solution:
Plank Constant and Angular momentum both have same dimension
Q6. The biological amplification of DDT in the various trophic levels is known as
Answer : Option A
Explaination / Solution:
Biomagnification, also known as bioamplification or biological magnification, is the increasing concentration of a substance, such as a toxic chemical, in the tissues of organisms at successively higher levels in a food chain.
The biological amplification of DDT in the various trophic levels is known as biomagnifications.
Q7. Name the following aryl halide as per the IUPAC system
Answer : Option D
Explaination / Solution:
At position 1 chloro group is present and at 2-methylpropyl is present.
Q8. One Kilobyte means
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. If the radius of earth reduces by 4% and density remains same then escape velocity will
Answer : Option C
Explaination / Solution:
Escape velocity ve α Rρ−−√and if density remains constant⇒ve α RSo if the radius reduces by 4% then escape velocity also reduces by 4%
Q10. All alkali metal halides are soluble in water except
Answer : Option A
Explaination / Solution:
Greater the lattice energy, higher is the melting point of the MX (metal halide) and lower is its solubility
