Community
Tests
-
- Description
- What does “Li” stand for on the Periodic Table of Elements?
-
- Description
- Without consulting the periodic table, see what you know about element names and symbols! Match each one with the corresponding, correct one! Pb
-
- Description
- Without looking at the periodic table, see if you can get the numbers of a few elements from the first 20 elements in the table correctly! This should be a piece of cake! Silic...
-
- Description
- How many moles of electrons weight one kilogram?
-
- Description
- Equivalent weights of oxidizing and reducing agents in the following reaction:
-
- Description
- The radius of the Polonium 210 nucleus may be taken as 8.3 fm. What is the radius of the iron –56 nucleus ?
-
- Description
- Action of hot and conc. on metallic tin produces:
-
- Description
- The first ionization energy for following metals will be in the order
-
- Description
- When the sodium salt of an organic acid is strongly heated, it yields sodium carbonate. If the weight ratio of the sodium salt to sodium carbonate obtained is 5 : 4, what is the...
-
- Description
- On gold surface, the rate of decomposition of HI is independent of the pressures of HI but on Pt surface, the rate is proportional to concentration of HI. It is concluded that
-
- Description
- An organic compound contains about 52% carbon. It could be which one or ones of the following
-
- Description
- What is the commercial names of trichloroethene -
-
- Description
- x, y and z in the following processes are -(1) (2) (3)
-
- Description
- (A) (B) The above reactions indicate that -
-
- Description
- What is the pH of the mixture 100 ml | NHCl + 60 ml | NaOH
-
- Description
- Number of gram of oxygen in 32.2 g is -
-
- Description
- If equal volume of 1M and 1M solutions are allowed to oxidize Fe (II) to Fe (III) in acidic medium, then Fe (II) oxidized will be
-
- Description
- is prepared by
-
- Description
- The IUPAC hydrogen compound is
-
- Description
- Which of the following will respond to Cannizzaro reaction ?
-
- Description
- Three isotopes of an element have mass numbers M, ( M + 1) and ( M +2). If mean mass number is ( M+0.5 ) then which of the following ratio may be accepted for M, ( M +1), (M +2)...
-
- Description
- The oxide of a metal contains 60 % of the metal. What will be the percentage of bromine in the bromide of the metal. If the valencey of the metal is the same in both the oxide a...
-
- Description
- In the modern periodic table the place of the element with atomic number 31 is in-
-
- Description
- Excess of NaOH solution reacts with zinc to form-
-
- Description
- Which one of the following does not give alkane?
-
- Description
- forms an alcohol on reaction with-
-
- Description
- Which of the following statement is correct?
-
- Description
- The maximum number of hydrogen bonds in which a water molecule can participate is-
-
- Description
- The reaction is spontaneous if the cell potential is-
-
- Description
- Which one of the following ions is colourless?
