Among the following alkaline earth metal halides, the one which is covalent and soluble in organic solvents is:

1. Magnesium chloride

2. Beryllium chloride

3. Calcium chloride

4. Strontium chloride

The maximum temperature that can be achieved in blast furnace is :

1. Upto 1900 K

2. Upto 5000 K

3. Upto 1200 K

4. Upto 2200 K

The structures of beryllium chloride in solid-state, and vapor state are :

1. Dimer, and Linear, respectively.

2. Chain in both.

3. Chain, and dimer, respectively.

4. Linear in both.

A particular station of All India Radio, New Delhi, broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is: [speed of light, $\mathrm{c}=3.0\times {10}^8$ ${\mathrm{ms}}^{-1}$]

In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?

Which of the following statements is correct for an irreversible isothermal expansion of an ideal gas?

1. $∆\mathrm{U}=0,<mspace\; width="1em"></mspace>∆{\mathrm{S}}_{\mathrm{total}}\ne 0$

2. $∆\mathrm{U}\ne 0,<mspace\; width="1em"></mspace>∆{\mathrm{S}}_{\mathrm{total}}=0$

3. $∆\mathrm{U}=0,<mspace\; width="1em"></mspace>∆{\mathrm{S}}_{\mathrm{total}}=0$

4. $∆\mathrm{U}\ne 0,<mspace\; width="1em"></mspace>∆{\mathrm{S}}_{\mathrm{total}}\ne 0$

Which pair of ions among the following list do not constitute an iso-electronic pair?

1. Mn²⁺, Fe³⁺

2. Fe²⁺, Mn²⁺

3. O^2–, F^–

4. Na⁺, Mg²⁺

Consider the below reaction and identify the missing reagent/chemical.
\(\mathrm{CH_{3}CH_{2}COO^{-}Na^{+} \ \xrightarrow[\textbf{Heat}]{\textbf{NaOH, + ? }} \ CH_{3}CH_{3} \ + \ Na_{2}CO_{3}}\)

1. CaO

2. DIBAL-H

3. B₂H₆

4. Red Phosphorus

Which molecule among the following is non-polar?