With reference to mental and matai with reference to metals and their ores, which of the following pairs is INCORRECT?
_______ are stable, negatively charged particles found in all atoms.
Rusting of iron is an example of _______.
_______ gas gives an orange glow when electricity is passed through it. It is generally used in fluorescent lighting.
What is the chemical name of slaked lime?
________ is the process by which water vapor in the air is changed into liquid water.
Flower colours of red, pink, blue and purple come mainly from pigments called _______.
_______ is one of the liquids commonly used in liquid-in-glass thermometers.
Which of the following is not a natural greenhouse gas?
Advertise with Us
RRB ALP & Technicians
Copyright © 2019 Sawaal.com | All Rights Reserved