Question 1

The largest number of molecules are present in

Accepted Answer

3.6g of $H_2O$

Answer

5.4g of$ N_2O_5$

Answer

4.8g of $C_2H_5OH $

Answer

2.8g of CO

Question 2

27g of Al reacts completely with how much mass of $O_2$ to produce $Al_2O_3$

Accepted Answer

24g

Answer

16 g

Answer

32 g

Answer

8g

Question 3

The volume occupied by 1.4g of $N_2$ at STP is

Accepted Answer

1.12 $dm^3$

Answer

2.24 $dm^3$

Answer

11.2 $dm^3 $

Answer

22.4$ dm^3$

Question 4

The volume occupied by 16g of$ CH_4$ at STP

Accepted Answer

22.4 $dm^3$

Answer

1.12 $dm^3$

Answer

11.2 $dm^3$

Answer

2.24 $dm^3$

Question 5

The mass of one mole of electron is

Accepted Answer

0.55 mg

Answer

0.184 mg

Answer

1.008 mg

Answer

1.673 mg

Question 6

One mole of $SO_2$ contains

Accepted Answer

6.02 x $10^2$$^3$ atoms of sulphur

Answer

1.81x $10^2$$^3$ molecules of $SO_2$

Answer

6.02 x $10^2$$^3$ atoms of oxygen

Answer

4g of atoms of  $SO_2$

Question 7

which of the following represent the actual number of atoms in a molecule?

Accepted Answer

molecular formula

Answer

empirical formula

Answer

Avogadro's no.

Answer

Gram atom

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