In the periodic table, elements have been arranged in order of _____.

1. 1. increasing volume
   2. increasing atomic number
   3. increasing atomic weights
   4. increasing density

When we move from left to right in second period in the periodic table, the atomic volume of the elements _____.

1. 1. increases
   2. decreases
   3. increases with constant state
   4. None of the above

Generally in a given period in the periodic table, as we move from left to right, the electropositive character of elements _____.

1. 1. increases
   2. decreases the then increases
   3. decreases
   4. neither increases nor decreases

When two ice cubes are pressed over each other, they unite to form one cube. Which of the following force is responsible for holding them together?

1. 1. Hydrogen bond formation
   2. Vander Walls forces
   3. Covalent attraction
   4. Dipole dipole attraction

The cooling caused by the expansion of a compressed gas below its inversion temperature without doing external work is called _____.

1. 1. Compton effect
   2. Faraday Tyndall effect
   3. Adiabatic diamagnetism
   4. Joule Thomson effect

Mendeleev’s periodic table is upset by the fact that _____.

1. 1. Noble gases do not form compounds
   2. Many elements have several isotopes
   3. Atomic weight of elements are not always whole numbers
   4. Some groups stand divided into two subgroups A and B

Stainless steel does not rust because _____.

1. 1. Nickel present in it does not rust
   2. Iron forms a hard chemical compound with chromium present in it
   3. Chromium and nickel combine with iron
   4. Chromium forms an oxide layer that protects iron from rusting

Milk lacks in one important nutrient namely _____.

1. 1. Iron
   2. Protein
   3. Calcium
   4. Potassium

In the periodic table, on moving left to right across a period, the metallic character of an element _____.

1. 1. decreases
   2. increases
   3. remains constant
   4. increases and then decreases

A gas can be liquefied by pressure alone when its temperature is _____.

1. 1. Higher than the critical temperature
   2. Equal to its critical temperature
   3. Lower than its critical temperature
   4. None of the above