General Science - Online Test
Q1. On germination, moss spore produce
Answer : Option D
Explaination / Solution:
The spore of moss germinate to produce protonema, which is a green, branched and frequently filamentous stage and develops a lateral bud which is called as secondary protonema or a leafy stage.Secondary protonema also gives rise to gametophore initials. Secondary protonema can undergo both sexual and asexual modes of reproduction. It reproduces asexually by the processes of budding and fragmentation. Sexual reproduction is the process which occurs in the leafy stage.
Q2. Which does not occur in cell membrane?
Answer : Option D
Explaination / Solution:
Cell membrane consists of phospholipids and protiens. Some cells also contain praline and cholesterol but glycolipid is not present in cell membrane.
Q3. The two ways of collecting information on the basis of questionnaire are _______.
Answer : Option A
Explaination / Solution:
A questionnair can be mailed or be filled by an enumerator considering the understanding level of the informant and accessibility.
Q4. The CPCB has identified ____ categories of industries which are significant polluters
Answer : Option D
Explaination / Solution:
No Explaination.
Q5. Copying of DNA to make more DNA copies is called DNA replication. Replication occurs by method of
Answer : Option A
Explaination / Solution:
In semiconservative replication, when the double stranded DNA helix is replicated, each of the two new double-stranded DNA helices consisted of one strand from the original helix and one newly synthesized. It has been called "the most beautiful experiment in biology.
Semi-conservative replication of DNA was proved by the Meselson and Stahl in 1958.
Q6. If the length of the filament of a heater is reduced by 10% the power of the heater will
Answer : Option B
Explaination / Solution:
The power is related to resistance as,
So Power increases by 11%.
Q7. In forced oscillations apart from acceleration forces, damping and spring forces there is
Answer : Option A
Explaination / Solution:
The free damping oscillations contains the forces as acceleration forces, damping and spring forces, But in the case of forced oscillations there is an external force that acts to maintain the vibrations that usually gets damped due to presence of the damping forces like friction, air drag etc.
the presence of the force promote to the Total Mechanical Energy relations.
Q8. Correct decreasing order for rate of primary productivity on land will be
Answer : Option B
Explaination / Solution:
Primary productivity is maximum in tropical rain forests due to availability of sufficient food and water followed by temperate forests. Savannah grasslands have comparatively less productivity and arid regions have limited biotic component and water.
Q9. According to the law of conservation of mass, a balanced chemical equation
Answer : Option C
Explaination / Solution:
According to law of conservation of mass
total mass of reactants
= total mass of product
∴ the number . of atoms of each element in reactants
= number . of atoms of that element in products
Q10. Metal hydrides are used for hydrogen storage because
Answer : Option B
Explaination / Solution:
Metal hydrides (MHx) are the most technologically relevant class of hydrogen storage materials because they can be used in a range of applications including neutron moderation,electrochemical cycling, thermal storage, heat pumps, and purification/separation.
The metal hydrides such as intermetallic alloys and solid solutions have interstitial vacancies where atomic hydrogen is absorbed via an exothermic reaction; however, by endothermic path, the metal hydride desorbs the hydrogen reversibly at ambient to moderate temperatures.
