General Science - Online Test
Q1. In rural areas percentage of poor population is more as compared to urban areas. Its main causes are as follows except
Answer : Option D
Explaination / Solution:
The main reason for this is :
Lack of infrastructure, Insufficient access to markets, Lack of non-motorised load-carrying wheeled vehicles, Rural versus Urban Poverty--United States, Opening up of economies to international trade etc
Q2. The structure formed by germinated fern spore is
Answer : Option A
Explaination / Solution:
Fern spores germinate to give rise to inconspicuous, small but multicellular, free-living, mostly photosynthetic thalloid gametophytes called prothallus.The gametophytes bear male and female sex organs called antheridia and archegonia.
Q3. Cytoskeleton is made of
Answer : Option D
Explaination / Solution:
An elaborate network of filamentous proteinaceous structures present in the cytoplasm is collectively referred to as the cytoskeleton.
Q4. Under stratified sampling population is divided into a number of sub-populations is called
Answer : Option D
Explaination / Solution:
After forming stratas, final subjects are selected randomly from thoes stratas.
Q5. Environmental degradation is
Answer : Option C
Explaination / Solution:
No Explaination.
Q6. During translation initiation in prokaryotes, a GTP molecule is needed in
Answer : Option A
Explaination / Solution:
During translation initiation in prokaryotes, a GTP molecule is required along with 30S ribosome, m-RNA with formyl-met-t-RNA. GTP provides energy and ribosomes provide site for translation.
Q7. An inductor with L = 9.50 mH is connected across an ac source that has voltage amplitude 45.0 V. Phase angle for the source voltage relative to the current is
Answer : Option D
Explaination / Solution:
if only inductor is present in circuit then R = 0
hence, phase angle
Q8. The wire of the potentiometer has resistance 4 ohms and length 1 m. It is connected to a cell of e.m.f. 2 volts and internal resistance 1 ohm, if a cell of e.m.f. 1.2 volt is balanced by it, the balancing length will be
Answer : Option D
Explaination / Solution:
If the battery has e.m.f E, resitance of the potentiometer is R and the internal resistance of the battery is r, then the current I flowing in the potentiometer wire is given by,
The potential difference V across the potentiometer
The potential gradient = ( potential drop across the potentiometer)/ length of the potentiometer wire)
= V/l
= 1.6/1
Potential gradient = 1.6 V/m
The emf of the cell
Q9. The bob of a simple pendulum has a mass of 20 g. The period of oscillations of the pendulum is 0.75 s. When the mass of bob is increased to 40 g, without any other change, the time period now becomes
Answer : Option D
Explaination / Solution:
No Explaination.
Q10. Which of the following hydrides is electron-precise hydride?
Answer : Option C
Explaination / Solution:
Electron precise hydride is the type of hydride in which the number of electrons present is equal to the number of electron required (octet or duplet). For example- CH4
CH4 has no lone pair of electron or vacant orbital so it is an electron precise hydride.
