EASY
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IMPORTANT
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The electronegativity of aluminum is similar to:
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Important Questions on The s-Block Elements
MEDIUM
JEE Main
IMPORTANT
The metal used for making X-ray tube window is:
EASY
JEE Main
IMPORTANT
A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above leads to an anhydrous white powder Z. X and Z, respectively, are;
EASY
JEE Main
IMPORTANT
What is the commercial name for calcium oxide?
HARD
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IMPORTANT
Consider the reaction sequence below:
X is :
MEDIUM
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IMPORTANT
The correct order of thermal stability of hydroxides is
HARD
JEE Main
IMPORTANT
Which one of the following elemental forms is not present in the enamel of the teeth?
EASY
JEE Main
IMPORTANT
Which one of the following compounds is used as a chemical in certain type of fire extinguishers
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JEE Main
IMPORTANT
In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?
