19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following is not a disadvantage of using hard water?
A water sample is said to contain permanent hardness if water contains
The maximum number of hydrogen bonds formed by a water molecule in ice is
Hydrolysis of SiCl4 gives
On moving from left to right in a period what is the order of acidic character of hydrides?
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 …
What is the trend of boiling points of hydrides of N, O and F?
On reaction with water, which of the following does not produce any hydride? (a) CaH (b) Be C (c) Mg N (d) Ca P
Metal hydrides may be ionic, covalent or molecular in nature. Among LiH,NaH,KH,RbH,CsH the correct order of increasing ionic character is
Earlier, it was thought that in the non-stoichiometric hydrides, hydrogen occupies interstices in the metal lattice producing distortion without any change in its type. Consequently, they were termed as ………X…….. Here,…
CH ,NH ,H O and HF are the example of
NaH s H O NaOH aq H g -> and 8LiH Al Cl 2LiAlH 6LiCl -> In the above reaction, NaH and LiH are the examples of
…….X….. are crystalline, non-volatile and non- conducting in solid state. (X) Melts conduct electricity and on electrolysis liberate dihydrogen gas at anode. Here, X refers to
Dihydrogen, under certain reaction condition, combines with almost all elements except noble gases to form binary compounds. The binary compounds are called
Which property of hydrogen is shown by the following reactions ? (i) Fe3O4 + 4H2 -> 3Fe + 4H2O (ii) CO + H2 -> O ZnO Cr CH3OH
Alkenes combine with carbon monoxide and hydrogen in presence of octacarbonyldicobalt as catalyst under high temperature and pressure to form
If a mole of hydrogen molecule is heated to a high temperature, then which of the following reaction take place ? (a) 2 g g g H 436kJmol H H -> (b) 2 g 2 g 2H 820kJmol 2H -> (c) 2 g 2 g g g H H 436kJmol …
The order of reactivity of halogens towards hydrogen is
Which of the following reactions of hydrogen with non- metals represents Haber‟s process ? (a) heat 2H O 2H O; H 285.9kJmol -> (b) 673K,Fe 200atm 3H N 2NH ; H 92.6kJmol -> (c) hv H Cl 2HCl -> (d) 1100 C 2H C C…
Which of the following statements is correct regarding hydrogen?
On burning hydrogen in air, the colour of flame is
Which of the following is not a property of hydrogen?
Which of the following properties of hydrogen is incorrect?
ZnO Cu CO H ->product. Identify the product formed in the given reaction. (a) CH COOH (b) CO (c) C O (d) CH OH
Which of the following gas in insoluble in water?