State and Classification of Matter

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

$3{\mathrm{CaCl}}_2 + 2{\mathrm{K}}_3{\mathrm{PO}}_4 ➔ {\mathrm{Ca}}_3{\left({\mathrm{PO}}_4\right)}_2 + 6 \mathrm{KCl}$
How many moles of potassium phosphate are needed to produce $0.075$ moles of potassium chloride?

The total numbers of moles of atoms present in $10 g$ of magnesium nitride having molecular mass equal to $100\mu$

Match the items of column $I$to those of column $II$

                      Column $I$                                              Column $II$

$1.$ u (unified mass)                                           $\left(i\right)$ $180 mL$ of water at $4°C$

 $2.$$1$ mole of nitrate ions                                  $\left(ii\right)$ $29.25 g$

 $3.$ $6.02\times {10}^{24} H_{2}O$ molecules                    $\left(iii\right) 62.0 g$

 $4.$ $0.5$moles of oxygen gas                               $\left(iv\right)$ $\frac{1}{N_0}g$ $\left(N_0= Avagadro Number\right)$

$5.$ $3.01\times {10}^{23}$ formula units of                        $\left(v\right)$ $11.2 L$ of oxygen at STP

      sodium chloride

The total numbers of moles of atoms present in $10g$ of magnesium nitride having molecular mass equal to $100\mu$.

A gold ring was found to contain copper and gold in the ratio of$1 : 1$ by mass. The atomic ratio $Cu/Au$ in the ring is approximately equal to