Question

1.Which is not Polyatomic unit

1 point

A phosphorus

B Sulphur

C copper

D hydrogen

2.which one of the following is used as a standard for atomic mass

1 point

A C-12

B C-13

C C-14

D all

3.Relative molecular mass of hydrogen molecule is

1 point

A 1.0078u

B 2.016u

C 35.46u

D 180u

4.Relative atomic mass of calcium and magnesium is

1 point

A 16,40

B 40,16

C 40,24

D 24,16

5.IUPAC

1 point

A International Union for and applied chemistry

B International Union of pure and applied chemistry

C International Union of pure applied and chemistry

D all

6.Concentration of he acid in gastric acid is

1 point

A 0.032M

B 0.043M

C 0.082M

D 0.1M

7.Volume occupied by one mole of any gaseous substance at 273Kand 1 bar pressure is

1 point

A 22.4L

B 24.5L

C 22.7L

D all

8.Gram equivalent mass of hydrochloric acid is

1 point

A 49g/eq

B 36.5g/eq

C 56g/eq

D 31.6g/eq

9.Number of moles present in 46g of ethanol is

1 point

A 3 mole

B 2 mole

C 1 mole

D zero mole

Other:

10.Empirical formula for benzene is

1 point

A HO

B CHO

C CH

D CO

11.Hiw many liter of carbondioxide produce when 32gof methane is completely burnt

1 point

A 22.4L

B 44.8L

C 11.2L

D 44g

12. 11.4L water occupied in steel container it's molar mass is

1 point

A 36g

B 18g

C 9g

D none of these

13. How many mole CaO produced when 100g of calcium carbonate is heated completely

1 point

A 1 mole

B 2 mole

C 3 mole

D zero mole

14.How much volume of chlorine is required to form 36.5g of HCl at 273Kand 1 atmosphere pressure

1 point

A 22.4L

B 11.2L

C 5.6L

D none of these

15. One mole of carbon react with one mole oxygen molecule to form how many mole of carbondioxide

1 point

A 1 mole

B 2 mole

C 3 mole

D 4 mole

16.Hydrogenperoxide (molar mass 34g/mole)its empirical formula HO, which is its whole number

1 point

A 3

B 2

C 1

D 5

17.Sour milk (molar mass 90g/mole) its empirical formula mass 30g it's whole number and name of the compound

1 point

A 2 and acetic acid

B 3 and acetic acid

C 3 and lactic acid

D 2 and lactic acid

18. Gram equivalent mass of sodium hydroxide is

1 point

A 49g/eq

B 56g/eq

C 40g/eq

D 31.6g/eq

19.The number of moles present in 18 g of ethane

1 point

A 0.3M

B 0.6M

C 0.9M

D 1M

20. Which is compound

1 point

A sugar

B carbondioxide

C potassium permanganate

D all

​

Answer 1

Answer:

1)C) copper

2) B) C-12

3) C) 35.46u

4) D) 24,16

5) B) international union of pure chemistry

20)A) sugar