The yellow colour in photochemical smog is due to the presence of____________?

A. Sulphur dioxide
B. Carbon dioxide
C. Nitrogen dioxide
D. CFC’s

Submitted by: Palestine

The blue colour of clear sky is due to_______________?
A. Reflection of light B. Refraction of light C. Diffraction of light D. Dispersion of light...
Blood does not coagulate inside the body due to the presence of___________?
A. Haemoglobin B. Fibrin C. Heparin D. Plasma Submitted by: Yaseen Nohri...
Permanent hardness of water is due to the presence of __________?
A. Sodium bicarbonate B. Calcium sulfate C. Calcium bicarbonate D. None of these Submitted by: Mirza Musawer Jamil...
Which of the following is not a primary colour ________.
A. Red B. Blue C. Green D. Yellow Submitted by: Yousuf Sanjrani...
Which colour of light is deviated least ________.
A. Red B. Blue C. Violet D. Green Submitted by: Yousuf Sanjrani...
A colour blind person cannot distinguish between _________?
A. White & Yellow B. Red & Green C. Red & Black D. Green & Black Submitted by: Mansoor Ahmed Suhag...
Red-green colour blindness in a man is known as:
A. Prolanopia B. Deuteranopia C. both a&b D. Marfan’s syndrome Submitted by: Tasawar Hussain channa...
An astronaut sees the colour of the sky as: _________?
A. Blue B. White C. Red D. Black Submitted by: Abid Hussain...
Which medicine can be used to make urine red in colour?
A. isoniazir B. iron capsule C. Rifampicin D. Omeprazole Submitted by: Abid Hussain...
What colour is called magenta?
A. Black B. White C. Yellow D. Reddish-Purple Submitted by: Kashif Ali Gaad...