Science KI Duniya

10/06/2015

Detergents used for cleaning clothes and utensils contain?
A.bicarbonates
B.bismuthates
C.sulphonates
D.nitrates

08/06/2015

Which of the following is an element?
A.Ruby
B.Sapphire
C.Emerald
D.Diamond

06/06/2015

Q) Air is a/an
A.compound
B.element
C.electrolyte
D.mixture

05/06/2015

Q) Fathom is the unit of
A.sound
B.depth
C.frequency
D.distance

05/06/2015

Q) Which scientist discovered the radioactive element radium?
A.Isaac Newton
B.Albert Einstein
C.Benjamin Franklin
D.Marie Curie

04/06/2015

Q) Decibel is the unit for
A.speed of light
B.radio wave frequency
C.intensity of sound
D.intensity of heat

04/06/2015

Q) The main buffer system of the human blood is
A.H2CO3- HCO3
B.H2CO3- CO32-
C.CH3COOH - CH3COO-
D.NH2CONH2- NH2CONH+

04/06/2015

Q)Which of the following is used in pencils?
A.Graphite
B.Silicon
C.Charcoal
D.Phosphorous

04/06/2015

Q)Sound travels fastest in.....
A) liquid
b) solid
c)gas

03/06/2015

03/06/2015

Q) How Many Bones in Human Skeleton ?
A)206
B)308
C)309
D)207

03/06/2015

Q) Brass gets discoloured in air because of the presence of which of the following gases in air?
A.Oxygen
B.Hydrogen sulphide
C.Carbon dioxide
D.Nitrogen