General Science - Online Test
Q1. Shape of the wave front of light emerging out of a convex lens when a point source is placed at its focus.
Answer : Option D
Explaination / Solution:
The rays of light becomes parallel after passing through a convex lens if the object is placed at focus. The shape of wavefront is plane as wavefront is perpendicular to rays.
Q2. Match the following:
Ecologist
a) Edward Wilson
b) Paul Ehlrich
c) A.V.Humboldt
d) Robert May
Contribution
i) estimated global species diversity
ii) term biodiversity
iii) Rivet Popper Hypothesis
iv) relation b/w species richness & explored area
Ecologist
a) Edward Wilson
b) Paul Ehlrich
c) A.V.Humboldt
d) Robert May
Contribution
i) estimated global species diversity
ii) term biodiversity
iii) Rivet Popper Hypothesis
iv) relation b/w species richness & explored area
Answer : Option A
Explaination / Solution:
Edward Wilson coined the term biodiversity. Paul Ehlrich proposed Rivet Popper Hypothesis. A.V. Humboldt shows relation between species richness and explored area. Robert May estimated global species diversity.
Q3. Which of the following cation does not form an ammine complex with excess of ammonia?
Answer : Option B
Explaination / Solution:
Na+ is s block element so doesnot form ammine complex.
Q4. Some girls develop male secondary sexual characters like beard, moustaches, hoarse voice etc. This is called
Answer : Option B
Explaination / Solution:
Development of secondary sexual characters like beard, moustaches , hoarse voice etc in girls is called adrenal virilism. This occurs due to excessive secretion of adrenaline hormone.
Q5. Bat and whales have ----- chambered heart.
Answer : Option D
Explaination / Solution:
Bat and whales have four chambered heart. Upper two chambers are called atrium and lower two chambers are called ventricle. All mammals have four chambered heart.
Q6. One of the various qualitative instruments used by the central bank in during inflation is
Answer : Option A
Explaination / Solution:
No Explaination.
Q7. To produce N – type crystal Ge or Si may be doped with a substance that is
Answer : Option B
Explaination / Solution:
If a pentavalent element from the Vth Group such as Antimony (Sb) is added to pure geranium (Ge) or silicone (Si), then four electrons of (Sb) will form covalent bonds with four (Ge) or (Si) atoms. The fifth electron of 'Sb' is free to move which makes (Ge) or (Si) a good conductor. This type of material is called n-type substance.
Q8. An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to
Answer : Option C
Explaination / Solution:
Equivalent conductance increases on dilution for a strong electrolyte because of increase in mobility of ions.
Q9. A monthly price index that uses the price changes in consumer goods and services for measuring the changes in consumer prices over time is known as the
Answer : Option A
Explaination / Solution:
No Explaination.
Q10. Conversion of spematid into a spermatozoan is called
Answer : Option B
Explaination / Solution:
Each spermatid undergoes metamorphosis to develop into spermatozoa or sperms having head, neck and tail. Acrosome is present at the tip of head that contain enzyme for hydrolysis of wall of ovum during fertilisation.
