metals and non-metals — Science STD 10 — Question

What type of oxides are formed when non-metals combine with oxygen?

When does the breaking and forming of bonds of chemical substances take place?

What are the vertical columns and the horizontal rows called in Mendeleev’s periodic table?

How do you magnetise a piece of magnetic material?

Identify me I am a type of cell division, significant during sexual reproduction and helping to maintain constant chromosome number generation after generation in particular species.

Which plant hormone retards the growth of plant ?

Explain translocation of sugar in the spring season in plants.

Identify me I am an external organ of male reproductive system essential for sexual intercourse, but due to covering on me, unwanted pregnancy and transmission of many infection can be prevented.

In which type of connection of resistors, current passing through each resistor is same?

For normal eye vision what is the objectdistance and image-distance when the object is placed at a far point? (Take the distance between the eye lens and the retina as 2.3 cm.)