Some materials available in the laboratory are given below. Magnesium ribbon, marble powder, marble pieces, dilute HCl, concentrated HCl
Which material will you choose for the preparation of more `CO_2` in less time ?

Some materials available in the laboratory are given below. Magnesium ribbon, marble powder, marble pieces, dilute HCl, concentrated HCl Write the balanced chemical equation of the reaction for preparation of Carbondioxide in less time

The chemical reaction between marble and dilute HCl is given CaCO_3+2HCl rarr CaCl_2+H_2O+CO_2 Which gas is formed here ? How can you identify this gas ?

The chemical reaction between marble and dilute HCl is given CaCO_3+2HCl rarr CaCl_2+H_2O+CO_2 Suggest any two ways you would choose to incease the rate of this chemical reaction. Explain the reason.

Alcohols can be prepared by treating alkyl halide with aqueous NaOH at room temperature and atmospheric pressure. You are given aniline, NaNO_2 and dilute HCl. Suggest a method to prepare phenol using these reagents. Write equations for the reactions.

You are given conc. HCl and salts of some alkaline earth metals and directed to conduct flame test and to detect the cation present in each salt. (a) Can you detect all the cations which are given here by this method? [CaCl_2, MgSO_4, Ba(NO_3)_2, BeCl_2, SrCl_2] (b) Justify your answer. (c) What is the mechanism of this test?