Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Which one of the following elements is involved in the water control of the blood?
Potassium
Lithium
Rubidium
Caesium
Which one of the following gases dissolve in water to give the acidic solution?
Carbon dioxide
Oxygen
Nitrogen
Hydrogen
Which one of the following elements is essential for the formation of chlorophyll in green plants?
Calcium
Iron
Magnesium
Consider the following chemical reaction: aFe2O3(s) + bCO(g) → cFe(s) + dCO2In the balanced chemical equation of the above, which of the following will be the values of the coefficients a, b, c and d respectively?
3, 2, 3, 1
1, 3, 2, 3
2, 3, 3, 1
3, 3, 2, 1
Why is argon gas used along with tungsten wire in an electric bulb?
To increase the life of the bulb
To reduce the consumption of electricity
To make the emitted light coloured
To reduce the cost of the bulb
