NDA CHEMISTRY QUIZ

Fire is extinguished by the following methods?

1. By spraying carbon dioxide
2. By spraying carbon tetrachloride
3. By spraying kerosene
4. By spraying alcohol

Which of the following oxide is acidic in nature?

1. Phosphorus trioxide
2. Sulphur dioxide
3. Carbon monoxide
4. Nitric oxide

Natural rubber becomes soft at high temperature and brittle at low temperatures , for the manufacturing of tyre rubber is vulcanized by adding

Two reactants in a flask at room temperature are producing bubbles of a gas that turn limewater milky. The reactants could be-

Which law states that “For a solution of volatile liquids, the partial vapour pressure of each component of the solution is directly proportional to its mole fraction present in solution”.

If hydration enthalpy is greater than lattice enthalpy then

The reaction between which of the following two reactants will produce hydrogen gas?

The products obtained from destructive distillation of coal are

Which of the following statement(s) is/are false regarding the modern periodic table?

(i) In the modern periodic table, the elements are arranged in decreasing order of their atomic numbers.

(ii) In the modern periodic table, the elements are arranged in increasing order of their atomic masses.

(iii) In the modern periodic table, isotopes are placed in adjacent groups.

(iv) In the modern periodic table, the elements are arranged in increasing order of their atomic numbers.

Which of the below allotropes of carbon is in the form of geodesic globe?