10TH CLASS

The Acid Present in Gastric Juice?

• CH3COOH

• HCl

• H2SO4

• HNO3

Which acid is known as king of acid ?

• CH3COOH

• HCL

• H2SO4

• HNO3

Deficiency of folic acid causes ?

• Anaemia

• Pellagra

• Glossits

• Rickets

The vitamin which helps in healing of wounds and fracture of bones is...?

• A

• B

• C

• D

Find the odd one different from other three?

• Carbohydrates

• Fats

• Proteins

• Pyrethroids

Dentist uses which mirror to observe teeth ?

• Concave Mirror

• Concave Lens

• Convex Mirror

• Convex Lens

Focus play main role in

• Rear view mirror

• Plane mirror

• Solar Cookers

• Periscopes

Convex mirror is used as ?

• Shaving mirror

• Focusing mirror

• Rear view mirror

• Vechile head lights reflector

The centre of mirror is called

• Centre of curvature

• Pole

• Radius of curvature

• Focus

For a concave mirror,the focal lenght is......

• positive

• negative

• zero

• none of these