19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Review the equilibrium and choose the correct statement HClO4 + H2O H3O + + ClO4 –
The conjugate acid of HPO4 2– is
Conjugate base of NH3 is (a) NH (b) NH (c) NH
The correct order of acid strength is
Cl – is the conjugate base of
The conjugate base of NH2 – is
A weak acid, HA has a Ka of 1.00 10 x . If 0.100 mole of this acid is dissolved in 1 L of water, the percentage of acid dissociated at equilibrium is closest to
What is meant by demineralized water ?
Which one of the following statements about water is FALSE?
The HOH angle in water molecule is about
What is the reaction given below called? aq aq H O H O H O OH l l
From group 6 only one metal forms hydride. This metal is
In complex hydrides, hydride ions act as ligand and are coordinated to metal ions. These hydrides are good reducing agents. Which of the following hydrides is not complex hydride ?
Assertion (A): The crystalline form of water is ice. Reason (R): At atmospheric pressure ice crystallizes in the hexagonal form but at very low temperature it condenses to the cubic form.
Hydrolysis of SiCl4 gives
Non-stoichiometric hydrides are produced by
On moving from left to right in a period what is the order of acidic character of hydrides?
Given below are the elements and the type of hydrides formed by them. Mark the incorrect match.
Dihydrogen forms three types of hydrides. (i) hydrides are formed by alkali metals and alkaline earth metals. (ii) hydrides are formed by non-metals and (iii) hydrides are formed by d and f-block elements at elevated …
Carbon hydride of the type, CnH2n+2 do not act as Lewis acid or Lewis base. They behave as normal covalent hydrides because
What is the trend of boiling points of hydrides of N, O and F?
Which of the following statements regarding hydrides is not correct?
The maximum number of hydrogen bonds formed by a water molecule in ice is
On reaction with water, which of the following does not produce any hydride? (a) CaH (b) Be C (c) Mg N (d) Ca P
Ionic hydrides react with water to give