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Helium
Krypton
Argon
Xenon
Which of the following of these travels in glass with min. velocity
Which of the following one of the folling is also khow as solution -
Which of the following one of the following animals can hear ultrasonic sound
Which of the following one of the following contains max. percentage of carbon
Which of the following one of the following contributes largely to the green house effect
Which of the following one of the following determines the sharpness of image in a camera -
Which of the following one of the following does not contain silver -
Which of the following one of the following does not form oxyacid
Which of the following one of the following elements is used in the manufacture of fertilizers
Which of the following one of the following gases has the highest calorific value -