Important Compounds of Group 14 Elements

${\mathrm{CO}}_2$ is passed through lime water. Initially the solution turns milky and then becomes clear upon continued bubbling of ${\mathrm{CO}}_2$. The clear solution is due to the formation of

The chemical reaction occurs during photosynthesis is _____.

Chemically zeolites are________

Artificial gem used for cutting glass is:

The role of haemoglobin is to
 

Graphite form of carbon conducts electricity due to the presence of _______

Carborundum is the commercial name of :-

The formula of sodium tungstate is${\mathrm{Na}}_2{\mathrm{WO}}_4$ and that of lead phosphate is${\mathrm{Pb}}_3{\left({\mathrm{PO}}_4\right)}_2$. What is the formula for lead tungstate?

The silicates formed from $\left[{\mathrm{SiO}}_4\right]{ }^{4 -}$ tetrahedral units by sharing three oxygen atoms are:

Which of the following is not a property of silicones?

A complex cross-linked polymer (silicone) is formed.

The structural unit present in pyrosilicates is:

Identify the correct statements from the following:
(a) ${\mathrm{CO}}_2\left(\mathrm{g}\right)$ is used as a refrigerant for ice cream and frozen food.
(b) The structure of ${\mathrm{C}}_{60}$ contains twelve six-membered carbon rings and twenty-five membered carbon rings.
(c) $\mathrm{ZSM}-5$, a type of zeolite, is used to convert alcohols into gasoline.
(d) $\mathrm{CO}$ is a colourless and odourless gas.

Which one is wrong :-

At $1000°\mathrm{C}$ air is passed on coal then which product will be form in the reaction :-

Which gas is responsible for green house effect :

Glass or silica soluble in:

Silicones have the general formula:

An example of a cyclic silicate is :-