19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following choice(s) represents(s) physical properties of alkali metals?
Which of the following element(s) is used as useful electrode(s) in photoelectric cells?
Sea water contain…by mass of the salt (NaCl)
All alkaline metals have …A… valence electrons(s). Here, A refer to
Alkali metals have …X… size in a particular period. Here, X refer to
Alkali metals show regular trend in their physical and chemical properties with the
Monovalent ions are …A…than parent atom. Here, A refers to
…X and …Y…Shown diagonal similarity. Here, X and Y refer to
Which of the following shows diagonal relationship?
The diagonal relationship of elements arises due to the similarity in
Atomic and ionic radii of alkali metals …X… on moving down the group. Here, X refer to
Group II elements with exceptions of beryllium are known as alkaline earth metals. These are so called because their …A…and …B… are alkaline in nature. Here, A and B refer to
Among the alkali metals …A and …B… are relatively more abundant in nature. Here A and B refer to
Which of the following does not belong to alkaline earth metal?
The ionization enthalpies of alkali metals are considerably
Which of the following metal is used to form useful alloys?
…A…is used in the manufacturing of soft soap. Here, A refer to
Lithium and magnesium oxides and hydroxides are …X… soluble in water. Here, X refers to
Sodium …X… is widely used as a/an …Y…. Here, X and Y refer to
What is the stoichiometric coefficient of Ca in the reaction? Ca Al Ca Al →
The ratio of stoichiometric coefficient of Fe²⁺ and MnO
In the ionic equation, BiO 6H xe Bi 3H O → the value of x is
Match the reactions in column I with their respective characteristics given in column II Column – 1 Column – 2 Name and Reaction Characteristics a. P PH H PO → p. Fractional oxidation number b. C O q. c. CH Cl r. Natu…
Assertion: F₂ undergoes disproportionation reaction. Reason: Fluorine shows both positive and negative oxidation states.
Which of the following is not a redox reaction? (a) CaCO CaO CO → (b) O 2H 2H O → (c) Na H O NaOH H → (d) MnCl MnCl Cl → REDOX REACTIONS Ans (a) Sol. a. Oxidation states of Ca and C are +2 and +4, respectively, in bot…