EASY

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4.4 g of an oxide of nitrogen gives 2.24 L of nitrogen. 60 g of another oxide of nitrogen gives 22.4 L of nitrogen at STP. This data illustrates the law of:

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Important Questions on Atomic Structure

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

Which of the following have same number of significant figures?
(A)

0.00253

(B)

1.0003

(C)

15.0

(D)

163

Choose the correct answer from the options given below

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

Which of the following conclusions could not be derived from Rutherford's

α

-particle scattering experiment:

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

Select the correct statements from the following :

A. Atoms of all elements are composed of two fundamental particles.
B. The mass of the electron is $9.10939 \times 10^{- 31} kg$ .
C. All the isotopes of a given element show same chemical properties.
D. Protons and electrons are collectively known as nucleons.
E. Dalton's atomic theory, regarded the atom as an ultimate particle of matter.

Choose the correct answer from the options given below:

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

56.0 L

of nitrogen gas is mixed with excess of hydrogen gas and it is found that

20 L

of ammonia gas is produced, The volume of unused nitrogen gas is found to be_____

L

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

The statement related to law of definite proportions is

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

Which of the following is an example of Law of multiple proportion?

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

A bicycle tyre is filled with air having pressure of

270 kPa

27 ° C

. The approximate pressure of the air in the tyre when the temperature increases to

36 ° C

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

Among the following pairs of compounds, the one that does not illustrate the law of multiple proportions, is

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

By heating

200 g

of metal carbonate,

112 g

of metal oxide on a gaseous compound are produced. Vapour density of the gaseous compound is

22

. How many moles of gaseous compound is produced in the reaction?

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

The Following data are obtained when dinitrogen and dioxygen react together to form different compounds.

	Mass of dinitrogen	Mass of dioxygen
(i)	14 g	16 g
(ii)	14 g	32 g
(iii)	28 g	32 g
(iv)	28 g	80g

Which law of chemical combination is obeyed by the above experimental data?

HARD

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

0.607 g

of silver salt of Tribasic acid was quantitatively reduced to

0.370 g

pure-Ag. Calculate molecular mass of tribasic acid

$R H_{3} \overset{{AgNO}_{3}}{⟶} R {Ag}_{3} \overset{1 g nition}{⟶} Ag$

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

20 mL

mixture of

CO

and

{CO}_{2}

is mixed with

X mL

oxygen and is electrically sparked leaving no reactants. The volume after the explosion is

(16 + X) mL

under the same conditions. What is the residual volume when

30 mL

of original mixture is treated with aqueous

NaOH

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

Carbon and oxygen are known to form two compounds. The carbon content in one of these is

42.9 %

while in the other it is

27.3 %

. Find the ratio of amounts of

C r e a c t i n g w i t h s a m e m a s s o f O

HARD

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

A 100 mL mixture of CO and CO₂ is passed through a tube containing red hot charcoal. The volume now becomes 160 mL. The volumes are measured under the same conditions of temperature and pressure. Amongst the following, select the correct statement (s).

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

When

2 g

of gas

A

is introduced into an evacuated flask kept at

25^{°} C

, the pressure is

1 atm

. If

3 g

of another gas

B

is then added to the same flask, the pressure becomes

1.5 atm

. Assuming an ideal gas behaviour, calculate the ratio of molecular mass

M_{A} : M_{B}

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

20.8 g

of barium chloride on reaction with

9.8 g

H_{2} S O_{4}

produces

7.3 g

H C l

and some amount of

B a S O_{4}

. The amount of

B a S O_{4}

formed is

HARD

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

Carbon combines with oxygen to form two oxides. The carbon content in one of the oxides is

42.9 %

while in the other oxide it is

27.3 %

. Show that these data are in agreement with the law of multiple proportions.

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

How many g atoms of S are present

i n 4.9 g H_{2} S O_{4}

EASY

Chemistry>Physical Chemistry>Atomic Structure>Atomic Models

8 l i t r e o f H_{2}

and

6 l i t r e o f C l_{2}

are allowed to react to maximum possible extent. Find out the final volume of reaction mixture. Suppose

P a n d T

remains constant throughout the course of reaction.

4.4 g of an oxide of nitrogen gives 2.24 L of nitrogen. 60 g of another oxide of nitrogen gives 22.4 L of nitrogen at STP. This data illustrates the law of:

Important Questions on Atomic Structure

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