Chemistry - MOST IMPORTANT Executive Civil Previous Year Questions
Practice real questions from previous year exams of Executive Civil.
One of the best methods for the large scale manufacturing of sodium hydroxide is ________.
Which of the following is the correct definition of a homologous series?
A hydrocarbon has the molecular formula C5H12. If one hydrogen atom at the second carbon is replaced by a hydroxyl (-OH) group, what is the correct IUPAC name of the compound?
Why are metals like potassium and sodium kept immersed in kerosene oil?
Which of the following statements are true about the colloids?
i. A colloid is a heterogeneous mixture.
ii. The size of particles of a colloid is too small to be individually seen with naked eyes.
iii. They cannot be separated from the mixture by the process of filtration. But a special technique of separation known as centrifugation can be used to separate the colloidal particles.
Which of the following statements is/are correct regarding the pH scale?
I. The pH of a neutral solution is 7.
II. Values more than 7 on the pH scale represent an acidic solution.
Which of the following fuels is/are fossil fuels?
I. Coal
II. Petroleum
III. Wood
What is the chemical formula for marble?
Which of the following statements is/are correct regarding Döbereiner's Triads?
I. Döbereiner showed that when the three elements in a triad were written in the order of increasing atomic masses; the atomic mass of the middle element was roughly the average of the atomic masses of the other two elements.
II. Döbereiner identified eight triads from the elements known at that time.
Ozone is a molecule formed by ____ atoms of oxygen.
In the modern periodic table, the atomic radius ____ in moving from left to right along a period.
Which acid is found in tomato?