Identify the correct statements from the following :
a) `CO_2(g)` is used as refrigerant for ice-cream and frozen food.
b) The structure of `C_(60)` contains twelve six carbon rings and twenty five carbon rings.
c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.
d) CO is colorless and odourless gas.

Identify the correct statement (s) from the following: (i) The catentiaon property of group 14 elements decreases from carbon to tin. (ii) Fullerence (C_(60)) has 20 five-membered carbon rings and 12 six-membered carbon rings. (iii) SiO_(2) is soluble in Conc.NaOH.

Identify the correct statements from the following a) Dichloromethane is used as a solvent b) Freons are used for refrigeration c) C CI_4 causes depletion of ozone layer d) Electrophilic substitution reactions haloben zenes occur faster than those of benzene

Explain the following (a) CO_(2) is a better reducing agent below 710 K whereas CO is a better reducing agent above 710 K . (b) Generally sulphide ores are converted into oxides before reduction. ( c) Silica is added to the sulphide ore of copper in the reverberatory furnance. (d) Carbon and hydrogen are not used as reducing agents at high temperature. (e) Vapour phase refining method is used for the purification of Ti

Explain the following (a) CO_(2) is a better reducing agent below 710 K whereas CO is a better reducing agent above 710 K . (b) Generally sulphide ores are converted into oxides before reduction. ( c) Silica is added to the sulphide ore of copper in the reverberatory furnance. (d) Carbon and hydrogen are not used as reducing agents at high temperature. (e) Vapour phase refining method is used for the purification of Ti

How many of the following statements are correct regarding allotropes of carbon: (a) Graphite is not a good conductor of electicity in perpendicular direction of layers at ordinary temperatures. (b) Coke is the impure form of carbon. ( c) Anthracite is the purest form of carbon. (d) Buckminister fullerence contains 12 five membered rings and 20 six-membered rings. (e) Diamond is a good conductor of heat. (f) Graphite is diamagnetic in nature. (g) Graphite is thermodynamically more stable than diamond

How many of the following statements are correct regarding allotropes of carbon: (a) Graphite is not a good conductor of electicity in perpendicular direction of layers at ordinary temperatures. (b) Coke is the impure form of carbon. ( c) Anthracite is the purest form of carbon. (d) Buckminister fullerence contains 12 five membered rings and 20 six-membered rings. (e) Diamond is a good conductor of heat. (f) Graphite is diamagnetic in nature. (g) Graphite is thermodynamically more stable than diamond

Give the correct order of initials T(true) or F(false) for following statements. (a) Micelles formation takes place only above craft temperature (b)ZSM-5 is a type of zeolites used as a catalyst in petrochemical industries. (c)A micell is an aggregation of surfactants in in aqueous solution, often spherical (d) Lyophilic sols are irreversible sols

2PbO+Crarr 2Pb +CO_(2) Which of the following statements are correct for the above chemical reaction? a) Lead is reduced b) CO_(2) is oxidized c) Carbon is oxidized d) Lead oxide is oxidized