Explanation

‘He’ gas effuse from a hole of 10 dm^3 vessel in “5” seconds. The time for effusion of O2 from the same hole of 10 dm^3 will be 14.1 seconds.

Explanation

Polymers that soften on heating and harden when cooled are called thermoplastics.

Explanation

The concentration of A after 29 seconds is approximately 0.15 M.

Explanation

The standard hydrogen electrode (SHE) is used as a reference electrode with an assigned electrode potential of 0 V.

Explanation

Uni negative ion is exothermic due to strong nuclear attraction and no already electron-electron repulsion.

Explanation

Explanation

In a forward reaction, the reactants form products, as represented from left to right in a chemical equation.

Explanation

Electronegativity:- Due to the increase in the number of protons electronegativity increases left to right in a period.

Explanation

Na₂CO₃ is the salt that will produce the highest pH when dissolved in water because it is derived from a strong base (NaOH) and a weak acid (H₂CO₃).

Explanation

The combination that will produce a precipitate is NaOH (aq) and Fe(NO3)3 (aq).