General Science - Online Test
Q1. An electric field can deflect
Answer : Option D
Explaination / Solution:
Only alpha rays are moving with small velocity and having charge so they will be affected by electric field.
Q2. Material is said to be ductile if
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. Primers are
Answer : Option A
Explaination / Solution:
Primers are chemically synthesized oligonucleotides that are complementary to the regions of DNA and the enzyme DNA polymerase.
Q4. If in glomerular capillaries, pressure of blood is 75 mm Hg, osmotic pressure of plasma proteins is 30 mm Hg, and hydrostatic pressure of fluid in renal tubule is 25 mm Hg then net force or the filtration pressure will be calculated as :
Answer : Option D
Explaination / Solution:
Net force of filtration pressure is equal to the blood pressure of glomerular capillaries minus sum of the osmotic pressure of plasma and hydrostatic pressure of fluid in renal tubule. So, filtration pressure = 75 – [ 30 + 20 ] mm Hg.
Q5. A thermodynamic process (state i →state f) is reversible
Answer : Option C
Explaination / Solution:
Irreversible process is one which can be reversed in such a way that all changes taking place in the direct process are exactly replaced in the inverse order and opposite sense and no changes are left behind.
Q6. Lamarck theory of organic evolution is usually known as
Answer : Option B
Explaination / Solution:
Lamarck theory of organic evolution is also known as inheritance of acquired traits. He believed that the character an individual gain in his life time is also passed to next generation.
Q7. Surface tension decreases as the temperature is raised because
Answer : Option D
Explaination / Solution:
Surface tension decreases as the temperature is raised because Increase in temperature increases the kinetic energy of the molecules and effectiveness of intermolecular attraction decreases.
Q8. The solutions which resist change in pH on dilution or with the addition of small amounts of acid or alkali
Answer : Option C
Explaination / Solution:
The solutions which resist change in pH on dilution or with the addition of small amounts of acid or alkali are called Buffer Solutions. Buffer solutions of known pH can be prepared from the knowledge of pKa of the acid or pK b of base and by controlling the ratio of the salt and acid or salt and base. A mixture of acetic acid and sodium acetate acts as buffer solution around pH 4.75 and a mixture of ammonium chloride and ammonium hydroxide acts as a buffer around pH 9.25.X`
Q9. Enzymes are used in the reaction as they are
Answer : Option A
Explaination / Solution:
Enzymes are bio catalyst
Q10. The casparian thickening occurs in the cells of
Answer : Option C
Explaination / Solution:
The tangential as well as radial walls of the endodermal cells have a deposition of water-impermeable, waxy material-suberin-in the form of casparian strips.
