10th Physical Science

The Specific heat of a substance depends on its____________

• Temparature

• Mass

• Nature

• All the above

Which of the following has more specific heat value?

• Kerosene oil

• Iron

• Copper

• Water

A solution turns red litmus blue .What is its PH value?

• 1

• 4

• 5

• 10

The colour of acid with phenopthalene indicator is?

• Pink

• Colourless

• Orange

• Red

Which of the following is snell's law?

• n1 sini=sinr/n2

• n1/n2=sinr/sini

• n2/n1=sinr/sini

• n2sini=constant

If the Speed of light were the same in all the media,which of the process is not possible.

• Reflection

• Refraction

• Dispersion

• All the above

Which one of the following materials can not be used to make a lens?

• Water

• Glass

• Plastic

• Clay

When a light ray travels denser to rarer medium, the relation between 'r' and 'i' is?

• r=i

• r>i

• r<i

• r/i

Which of the following element is electo negative?

• Sodium

• Magnesium

• Oxygen

• Calcium

Galena is the ore of _______

• Zn

• Pb

• Hg

• Al