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quiz 4 sec 1

Total questions: 13

Worksheet time: 25mins

Name
Class
Date
1.

number of moles …..

a)

mass of substances by gram + molar mass

b)

mass of substances by gram / molar mass

c)

mass of substances by gram x molar mass

d)

molar mass / mass of substances by gram

2.

Substances its mass is 80g and number of moles is 2 mole so its molar mass is

a)

160g

b)

40g

c)

100g

d)

400g

3.

NO.of mole atoms of Phosporus in vapour state .. .. no of mole atomsofSulpher in the same physical state

a)

double

b)

half

c)

quarter

d)

third

4.

in the reaction 2Mg + O2 ------ 2MgO , if the mass of the produced MgO is 80 g so the mass of oxygen which enter reaction is ........ .[Mg=24, 0=16]

a)

32g

b)

46g

c)

64g

d)

60g

5.

According to the following reaction 3H2 + N2----- 2NH3 if the mass of reacted hydrogen 30 g so the number of moles of reacted nitrogen is

a)

2mol

b)

3mol

c)

4mol

d)

5mol

6.

Substances molar mass = 40 g and number of moles is 2 mol so its mass is

a)

More than 40 g

b)

Less than 40 g

c)

Less than 2g

d)

10 g

7.

According the following reacton 2X2 + Y2 …….2X2Y IF 36 MOL OF GAS X2 reacted with amount of Y2 gas so number of moles of gas produced from recaction …….mol

a)

18 mol

b)

36 mol

c)

9 mol

d)

10 mol

8.

if the molar mass of hydrated cupper sulphate CuSo4 ,, XH2O equal 249.5 g so X value will equal [Cu=63.5 , 0=16 , H=1]

a)

3

b)

4

c)

5

d)

6

9.

which of the following apply on neutralization reaction ..

a)

produce acid and base

b)

produce acid and water

c)

all of them expressed by formula ions

d)

reaction of acid and water

10.

the largest molar mass of the following is ....

a)

mole of sulphur in vapor state

b)

mole of sulphur in solid state

c)

mole of phosphorous in vapor state

d)

mole of phosphorous in solid state

11.

if mass of 1 mol of X2(SO4)3 equal 342g so X value equal …..

a)

28

b)

27

c)

56

d)

30

12.

Same masses of different gases different in STP contains same number if molecules bec .....

a)

have same number of ions

b)

have same number of moles

c)

have same molar mass

d)

have same number of atoms

13.

By increasing mass of substance to double , which of the following is correct

a)

molar mass decrease to half

b)

molar mass still constant

c)

number of molecules decrease to half

d)

number of moles decrease to half