State and Classification of Matter

Which of the following statements with regard to heating of lead nitrate powder over a flame are correct?

$1.$ Brown fumes of $\mathrm{NO}$ are released.

$2.$ Colourless ${\mathrm{O}}_2$ gas is released.

$3.$ It is an example of oxidation reaction.

$4.$ It is an example of thermal decomposition used for the production of ${\mathrm{NO}}_2$ gas.

Select the correct answer using the code given below.

Urea is produced by metabolism of _____. 

When water is heated from $0^{\mathrm{o}} \mathrm{C}$ to $4^{\mathrm{o}} \mathrm{C}$, its density _____. 

${\mathrm{Cl}}^{-}$ is not isoelectronic with

Consider the following statements about Tincture of Iodine:

$1.$ It is an antiseptic solution.
$2.$ Iodine is kept in alcohol-water mixture.
$3.$ Concentration of iodine is very low.

How many of the above statements is/are correct?

The percentage by volume of ${\mathrm{C}}_3{\mathrm{H}}_8$ in a gaseous mixture of ${\mathrm{C}}_3{\mathrm{H}}_8, {\mathrm{CH}}_4 \text{and} \mathrm{CO} \text{is} 20.$ When $100 \mathrm{mL}$ of the mixture is burnt in excess of ${\mathrm{O}}_2$, the volume of ${\mathrm{CO}}_2$ produced is:

Which statement is false for the balanced equation given below?

${\mathrm{CS}}_2 + 3{\mathrm{O}}_2 \to 2{\mathrm{SO}}_2 +{\mathrm{CO}}_2$

${\mathrm{FeSO}}_4.7{\mathrm{H}}_2\mathrm{O}$ is _____

Which of the following is the SI unit of atomic mass unit?

Which of the following represents a molecule?

The volume occupied by half a mole of a gas at standard temperature and pressure is:

The reaction of the burning of carbon in oxygen is represented by equation

$\mathrm{C}\left(\mathrm{s}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right) \stackrel{}{\to } {\mathrm{CO}}_2\left(\mathrm{g}\right)+\mathrm{Heat}+\mathrm{Light}$

When 9.0 g of solid carbon is burnt in 16.0 g of oxygen gas the mass of carbon dioxide gas formed would be:

(Note: Atomic mass of C-12,o u, O=16.0 u)

One mole of ${\mathrm{SO}}_2$ means

The visible universe is estimated to contain ${10}^{22}$ stars. How many moles of stars are present in the visible universe.

Brownian movement belongs to which of the following given property?

One mole of compound $x_m{y}_m$ is completely ionised. How many moles of ions are produced in all?

Which of the following pairs of substances have atomicity more than 2?

Mass of one atom of chlorine is

Read the following statements

(i). The number of atoms in$1$ gm of $CO$ molecules

(ii). Number of atoms in $1$ gm of $C_2{H}_4$  molecules

(III). Number of C atoms in $1$ gm of $C_4{H}_8$ molecules

(IV). Number of C atoms in $1$ gm of $CO$ molecules

Which of the above are equal to each other?

which statement is correct for $6.022\times {10}^{23}$ molecules of $N_2{O}_3$ gas

it is 0.2 mol

it is 15.2 mol

it contains $3N_A$ oxygen atoms