General Science - Online Test
Q1. The first organisms were
Answer : Option D
Explaination / Solution:
The first organisms were chemo heterotrophs. This is because, oxygen was absent on previous earth when organisms have evolved. Chemo heterotrophs can obtain energy from chemicals like sulpher and phosphorus.
Q2. The intermolecular force primarily responsible for the condensed states of nonpolar substances is the
Answer : Option A
Explaination / Solution:
The intermolecular force primarily responsible for the condensed states of nonpolar substances is the dispersion force (or London force).
Q3. The following amine can be classified as
Answer : Option D
Explaination / Solution:
This is tertiary amine but since all the alkyl groups are attachted so it is mixed amine.
Q4. A speciallised parenchymatous cells, which are closely associated with sieve tube elements is
Answer : Option D
Explaination / Solution:
The companion cells are specialised parenchymatous cells, which are closely associated with sieve tube elements. The sieve tube elements and companion cells are connected by pit fields present between their common longitudinal walls.
Q5. Auxins are generally produced in
Answer : Option D
Explaination / Solution:
Auxins promote stem elongation, inhibit growth of lateral buds (maintains apical dominance). They are produced in the stem, buds, and root tips.
Example: Indole Acetic Acid (IA).
Auxin is a plant hormone produced in the stem tip that promotes cell elongation
Q6. In Geiger-Marsden experiment prediction was that
Answer : Option A
Explaination / Solution:
No Explaination.
Q7. In MagniferaindicaLinn, ‘Linn’ denotes
Answer : Option D
Explaination / Solution:
In MangiferaindicaLinn, the word ‘Linn’ indicates that this species was first described by Linnaeus. Hence, the correct option is The name of the author who first described the species.
Q8.
The number of chain isomers of are
Answer : Option A
Explaination / Solution:
n-pentane CH3CH2CH2CH2CH3
2-Methylbutane CH3CH(CH3)CH2CH3
2,2-Dimethylpropane CH3CH(CH3)2CH3
Q9. For ideal solution the volume of mixing of the pure components to form the solution is
Answer : Option B
Explaination / Solution:
For ideal solution there is no increase or decrease in volume on mixing.
Q10. The new agricultural strategy was adopted in India during the
Answer : Option A
Explaination / Solution:
The new agricultural strategy which is also known as Green revolution in India was adopted in third five year plan in the year of 1960.
