Chemistry
The structure of NaCl crystal is

Body centered cubic
Octahedral
Square planar
Face centered cubic

ANSWER DOWNLOAD EXAMIANS APP

Chemistry
Man dies in the atmosphere of CO, because it

Combines with O2 present in the body
Dries up the blood
Reduces the organic matter of tissues
Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2

ANSWER DOWNLOAD EXAMIANS APP