19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following is an atom of tritium? (a) (b) (c) (d)
The isotopes of hydrogen have different physical properties due to difference in mass. They have almost same chemical properties with a difference in their rates of reactions which is mainly due to
Deuterium is
Which of the following is not an isotope of hydrogen?
Which of the elements is present in plant, animal tissues, carbohydrates, proteins, hydrides including hydrocarbons and many other compounds?
Which of the following explanations justifies not placing hydrogen in either the group of alkali metals or halogens?
Which of the following is/are true statement(s) regarding characteristic of hydrogen? I. Hydrogen resembles alkali metals due to the similar outer electronic configuration ns . II. Hydrogen resembles halogens due to …
Assertion (A): Hydrogen is the first element in the periodic table. Reason (R): It has electronic configuration 1s .
Which of the following statement regarding protium, deuterium and tritium is not correct?
Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors, which one is the most important in this respect?
Like alkali metals, hydrogen forms I. Oxides and oxyacids. II. Halides and interhalides. III. Oxides, halides and sulphide.
Hydrogen has resemblance to alkali metals as well as with halogens. The reason is that
In elemental form, hydrogen exists as
In atomic form, hydrogen consists of…….X…… proton and ……..Y…… electron. X and Y are
Point out the element which has simplest atomic structure among all the elements around us in nature.
How many ‘mL’ of perhydrol is required to produce sufficient oxygen which can be used to completely convert 2 L of SO2 gas? (BITSAT 2007)
Hardness of water is due to the presence of salts of (AMU 2007)
In which of the following properties hydrogen does not show similarity with alkali metals?
The formula of Calgon, used for water softening is (EAMCET 2007)
Radioactive isotope of hydrogen is (RPMT 2007)
Which one of the following processes will produce hard water? (RPMT 2008)
If 11.1 mg of CaCl2 and 12 mg of MgSO4 are present in 2 L of water, what is its hardness (in gram CaCO3 / ppm)? (EAMCET 2008)
Match the following (CPMT 2008) Column I Column II (A) 10 vol H2O2
Permanent hardness of water is due to the presence of (Kerala CEE 2011)
Point out the element which has simplest atomic structure among all the elements around us in nature.