19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
A particular solid is very hard and has a high melting point. In solid state, it is a non-conductor and its melt is a conductor of electricity. Classify the solid.
Which one of the following is a molecular crystal?
Glass is
The property of crystalline solid is not
Which one of the following forms a molecular solid when solidified?
Given, Column A Column B A. Ionic solid I. NaCl B. Metallic solid II. Fe C. Covalent solid III. C(graphite) D. Molecular solid IV. Dry ice
NaCl is an example of
Which of the following is an example of ionic crystal solid
Which of the following is an example of metallic crystal solid
Diamond is an example of
Which of the following is an example of covalent crystal solid
Particles of quartz are packed by
In graphite, carbon atoms are joined together due to
Solid CO2 is an example of
Which of the following is a molecular crystal
Melting and boiling point of the alkaline earth metal are …X… than the corresponding alkali metal due to …Y… sizes. Here, X and Y refer to s-BLOCK
Match the Column I and Column II according to element and their characteristics colours, appears in flame test and select the correct option from the codes given below. Column I Column II A. Ca 1. Apples green B. Sr 2…
Beryllium and magnesium do not impart any colour to the flame test. The reason is that
Beryllium and Magnesium are kinetically inert to oxygen and water because of formation of …X.. on their surface. Here, X refer to
Powder of beryllium burns in air frequently to produce
Match List-I with List-II. List-I List-II
Identify the incorrect statement from the following (NEET 2022)
Choose the incorrect statement out of the following
Which of the following statement (s) is/are correct regarding alkali metal halides? I. They possess high melting point and are crystalline in nature. II. They are prepared by reaction of appropriate oxides with aque…
Choose the correct statement/statement out of the following (a) f H always became less negative on moving top to bottom for alkali halides (b) f H always becomes less negative from fluoride to iodide for alkali me…