Which one of the following statements is NOT correct?
The higher the hydrogen ion concentration in a solution, higher is its pH
Correct Answer: (b) The higher the hydrogen ion concentration in a solution, higher is its pH
Explanation: The pH scale works inversely: the higher the hydrogen ion concentration in a solution, the lower its pH value.
The equivalent weight of oxalic acid in C2H2O4⋅2H2O is_________.
Which one of the following statements is correct?
The compound C6H12 O4 contains________.
Number of molecules of water of crystallization in copper sulphate, sodium carbonate and Gypsum are
Which one of the following is a non-metallic mineral?
When pure water boils vigorously, the bubbles that rise to the surface are composed primarily of
The species that has the same number of electrons as \({}_{17}^{35}Cl\) is
How much CO 2is produced on heating of 1 kg of carbon?
Which one of the following elements is least reactive with water?
20 g of common salt is dissolved in 180 g of water. What is the mass percentage of the salt in the solution?
Which of the following pair is correct?
I. Isotopes – different mass numbers
II. Isobars – different atomic numbers
Which of the following is a zone of a flame?
I. Dark
II. Luminous
III. Non-Luminous
Sphalerite is an ore of:
If formula of sodium salt of an anion X is \(Na_2X\) , then the formula of its aluminium salt would be
Which of the following set contains same number of molecules?
A. 1 gram O 2, 2 grams SO 2
B. 1 gram CO 2, 1 gram N 2O
C. 1 gram O 2, 1 gram O 3