Question

1. Which phenomenon is responsible for increasing the apparent length of the day by 4 min?
2. Which of the following property of a proton can change while it moves freely in a magnetic
field?
3. What is the common name of Caoc12?
4. Define co-valent bonding and give two-two example.
5. Name the disease which is caused by a virus.
6. Define the term Callus.
7. In a bisexual flower in spite of the young stamens being removed artificially, the flower
produces fruit
8. How do we know that two different individuals belong to same species?
9. Name the cell in eye which is responsible to give signals to mind.
10. Why we choose solenoid over coil in study of magnetic effect of current.
11. Explain the magnetic field gives it unit in Sl and CGS from.
12. Why curd should not kept in brass and copper vessels?
13. Aqueous solution of HCL shows acidic character where as aqueous solution of glucose does
not why?​

Answer 1

Answer:

watching mover than it's need

Answer 2

Explanation:

1. refraction
2. The phenomenon is refraction, the sunlight is refracted by the particles in atmosphere which makes sun appear even when it is below horizon.
3. Each moving charged particle in a magnetic field experiences a force. The direction of force experienced by a positive charge (i.e., a proton) is given by Fleming's left hand rule. The force acting on the proton would change both velocity and momentum.
4. Ca +forms two ionic bonds with H − ion. While in CCl 4 , carbon forms 4 covalent bonds with four hydrogen atoms.
5. Examples of Covalent Bonding. Methane molecule (CH4) The electronic configuration of carbon is 2,4. It needs 4 more electrons in its outer shell to be like the noble gas neon. ... Water molecule (H2O) One oxygen atom joins with two hydrogen atoms. ... Carbon dioxide (CO2) One carbon atom joins with two oxygen atoms.
6. COVID-19 is caused by the virus SARS-CoV-2

I'll give ans remaining afterwards