Advertisements
Advertisements
प्रश्न
Name the following.
The most abundant element in the universe.
उत्तर
The most abundant element in the universe - Hydrogen (H)
APPEARS IN
संबंधित प्रश्न
Explain the following.
Standard reduction potential of alkali metals have high negative values.
Explain the following.
Sodium dissolves in liquid ammonia to form a solution which shows electrical conductivity.
Explain the following.
Lithium floats and water while sodium floats and catches fire when put in water.
Write a balanced chemical equation for the following.
Beryllium oxide is treated separately with aqueous HCl and aqueous NaOH solutions.
Answer the following question.
A water sample, which did not give lather with soap, was found to contain \[\ce{Ca(HCO3)2}\] and \[\ce{Mg(HCO3)2}\]. Which chemical will make this water give lather with soap? Explain with the help of chemical reactions.
Name the following.
Alkali metal with smallest atom.
Name the following.
Ions having high concentration in cell sap.
When beryllium is ignited in air, the products are ____________.
Which of the following alkaline earth metals has the least affinity towards oxygen?
Which of the following is radioactive?
The first ionization enthalpies of alkali metals decreases down the group because of
Which of the following is CORRECT for the atomic and ionic radii of alkali metals?
The diagonal relationship in Be and Al is due to ______.
The oxidation states of O atom in Na2O2 and KO2 are ____________, respectively.
Identify the metals having electronic configuration of [Ar]4s2 and [Kr]5s2 respectively.
In the following reaction, metal 'M' CANNOT be ____________.
\[\ce{M + O2 ->[\Delta] MO2}\]
Which among the following is used as a source of oxygen in submarine in emergency breathing apparatus?
Which among the following chlorides of alkali metal is deliquescent?
Which among the following elements has highest ionisation enthalpy and bears a diagonal relationship with aluminium?
What is the electronic configuration of third element of group-2 in periodic table?
Which among the following alkali metal chlorides form hydrate?
Beryllium shows diagonal relationship with aluminium. Which of the following similarity is incorrect?
Which of the following bicarbonates does not exist as a solid?
Which among the following elements of group-2 exhibits anomalous properties?
Which among the group-15 elements does not exist as tetra atomic molecule?
Which of the following is most soluble in water?
Which of the following trend is correct with respect to the reactivity of alkali metal oxides with water?
