General Science - Online Test
Q1. Which of the following can be termed as mixed complex?
Answer : Option B
Explaination / Solution:
In A one and more different types of ligands are present.
Q2.
Match the names of organ having isolated endocrine cells with hormone secreted by those cells :
| Organ | Hormone |
| a) Kidney | i) angiotensin |
| b) Liver | ii) Erythropoietin |
| c) Gastro-intestinal Tract | iii) ANF |
| d) Heart | iv) CCK |
Answer : Option C
Explaination / Solution:
The atrial wall of our heart secretes a very important peptide hormone called ANF.
Angiotensin I is produced by the action of renin (an enzyme produced by the kidneys) on a protein called angiotensinogen, which is formed by the liver.
The juxtaglomerular cells of kidney produce a peptide hormone called erythropoietin.
The gastro-intestinal tract secrete peptide hormone called CCK.
Q3. Which of the following statements correct?
Answer : Option A
Explaination / Solution:
The acceleration due to gravity due to a body at point P on the surface of earth is
-(1)
Let the body is placed to point Q at a height h abovr the surface of earth, then acceleration due to gravity:
-(ii)
Dividing (i) & (ii), we get
By simplifying and expanding through binomial theorem, we get
From above expression we can clearly say that with increase in altitiude h , the value of acceleration due to gravity decreases.
Q4. One of the simplest methods of preventing corrosion is to prevent the surface of the metallic object to come in contact with atmosphere. This can be done
Answer : Option C
Explaination / Solution:
Best way to prevent corrosion is to prevent the surface of metallic object to come in contct with atmosphere.
Q5. Petromyzon is included under
Answer : Option D
Explaination / Solution:
Petromyzon is a jawless vertebrate and hence included under Agnatha.
Q6. M1 includes
Answer : Option B
Explaination / Solution:
No Explaination.
Q7. When the conductivity of a semiconductor is only due to breaking of the covalent bonds, the semiconductor is called
Answer : Option B
Explaination / Solution:
A pure semiconductor is called intrinsic semiconductor, e.g., silicon, germanium. The presence of the mobile charge carriers is the intrinsic property of the material. At room temperature, some covalent bonds are broken and electrons are made free. The absence of electron in the covalent bond form hole.
The electrical conduction is by means of mobile electrons and holes. Hole act as positive charge, because it can attract an electron. If some other bond is broken and the electron thus freed fills this hole(vacancy), it seems as though the hole is moving.
Actually an electron is travelling in opposite direction. In a pure(intrinsic) semiconductor, the number of holes is equal to the number of free electrons.
Q8. When a firm’s TR>TC, it does not earn maximum profits
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. In index numbers, price in the base year is denoted by ………..
Answer : Option D
Explaination / Solution:
p0 indicate the price of the commodity in the base period, Symbolically p0 prices of base year
Q10. Endometrium is the lining of
Answer : Option B
Explaination / Solution:
The inner lining of uterus is called endometrium. It gets ruptured at the beginning of menstrual cycle and comes out through vagina along with blood vessels. It is formed in expectation of pregnancy every month.
