Classify the following substances into element, compound and mixture. (i) Dry ice. (ii) Sodium chloride.
In how many solids only london dispersion forces exist ? Dry ice, Ice, Solid I_(2) , Solid 'Xe', Rocksalt, 'He' gas
Which of the following is (are) an endothermic process(es)? (i) Dilution of sulphuric acid (ii) Sublimation of dry ice (iii) Condensation of water vapours (iv) Evaporation of water
Classifiy the following into inoic, molecular, covalent and metallic crystals: SiO_(2) (quartz), brass bronze, dry ice, nitre diamond, H_(2) O (ice), SO_(2), I_(2) CaO
Assertion : A larger dry cell has higher emf. Reason : The emf of a dry cell is proportional to its size.
Dry air is a good conductor of electricity.
Structural units of ice and dry ice are , respectively .
