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Which of the following pairs cannot be represented with a chemical formula?
Which of the following describes the chemical property of acids?
Which of the following pollutants will lead to the depletion of ozone layer?
Which two gases can be used for the demonstration of the fountain experiment?
A radioactive nucleus has a half-life of 20 years, starting with 100,000 particles, how many particles will be left exactly at the end of 40 years
Na\(_2\)CO\(_3\) + 2HCl \(\to\) 2NaCl + H\(_2\)O + CO\(_2\)
The indicator most suitable for this reaction should have a pH equal to
The molecular shape and bond angle of water are respectively
Which of the following properties increases from left to right along the period but decreases down the group in the Periodic Table?
i. Atomic Number ii. Ionization energy iii. Metallic character iv. Electron affinity
At 27°C, 58.5g of sodium chloride is present in 250cm\(^3\) of a solution. The solubility of sodium chloride at this temperature is?
(molar mass of sodium chloride = 111.0gmol\(^{-1}\))
What technique is suitable for separating a binary solution of potassium chloride and potassium trioxochlorate (V)?
Which of the following does not support the fact that air is a mixture?
Which of the following statements about catalyst is false?
The heat of formation of ethene, C\(_2\)H\(_4\) is 50 kJmol\(^{-1}\), and that of ethane, C\(_2\)H\(_6\) is -82kJmol\(^{-1}\). Calculate the heat evolved in the process:
C\(_2\)H\(_4\) + H\(_2\) \(\to\) C\(_2\)H\(_6\)
If acidified Potassium Dichromate(VI) (K\(_2\)Cr\(_2\)O\(_7\)) acts as oxidizing agent, color changes from
Which of the following reactions is an oxidation process?
For the general equation of the nature
xP + yQ ⇌ mR + nS, the expression for the equilibrium constant is
Consider the reaction
A\(_{(s)}\) + 2B\(_{(g)}\) → 2C\(_{(aq)}\) + D\(_{(g)}\)
What will be the effect of a decrease in pressure on the reaction?
Which of the following represents the kind of bonding present in ammonium chloride?
When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called
The combustion of carbon(II)oxide in oxygen can be represented by equation:
2CO + O\(_2\) → 2CO\(_2\)
Calculate the volume of the resulting mixture at the end of the reaction, if 50cm\(^3\) of carbon(ii)oxide was exploded in 100cm\(^3\) of oxygen