Civilsdaily
A person with ‘AB’ blood group is sometimes called a universal recipient because of the
(a)
lack of antigen in his blood
(b)
lack of antibodies in his blood
(c)
lack of both antigens and antibodies in his blood
(d)
presence of antibodies in his blood
(B)
Which one of the following sets is correctly matched ?
Diphtheria, Pneumonia and Leprosy : Hereditary
AIDS, Syphilis and Gonorrhoea : Bacterial
Colour blindness, Hemophilia and Sickle cell anaemia : Sex linked
Polio, Japanese B encephalitis and plague : Viral
(C)
Zero was invented by
Aryabhata
Varahamihira
Bhaskara I
an unknown Indian
(D)
Which one of the following fuels causes minimum environmental pollution ?
Diesel
Coal
Hydrogen
Kerosene
The difference between a nuclear reactor and an atomic bomb is that
no chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction
the chain reaction in nuclear reactor is controlled
the chain reaction in nuclear reactor is not controlled
no chain reaction takes place in atomic bomb while it takes place in nuclear reactor
An air bubble in water will act like a
convex mirror
convex lens
concave mirror
concave lens
The variations in temperatures from 0°C to 100°C with respect to time of two liquids P, Q are shown in the graph given below. Which one of the following statements is correct ?
During heating, liquid P remained hotter than liquid Q throughout
At no point of time during heating did the two liquids have the same temperature
P attained the temperature of 100°C faster than Q
Q attained the temperature of 100°C faster than P
Answer not available
Cryogenic engines find applications in
sub-marine propulsion
frost-free refrigerators
rocket technology
researches in superconductivity
Which one of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torchlights, electric shavers, etc?
Nickel and cadmium
Zinc and carbon
Lead peroxide and lead
Iron and cadmium
(A)
Optical fibre works on the principle of
total internal reflection
refraction
scattering
interference