Question

1.Valency is the ____________ of an element. (1 Point) solubility density condensing capacity combining capacity 2.The compound among the following in which both the ions has a valency of 1 is (1 Point) MgF2 Na2O BaO HCl 3.The gas that does not have a stable gas configuration among the following is ___________. (1 Point) hydrogen helium argon neon 4.The formula of copper sulphate is (1 Point) Cu2(SO4)3 Cu(SO4)3 CuSO4 Cu2SO4 5.The monoatomic ion among the following is (1 Point) NO3- OH- CO32- S2- 6.Zinc exists as __________ in its compound. (1 Point) Zn2+ Zn3+ Zn+ Zn 7.Sodium exists as ___________ in its compound. (1 Point) Na Na+ Na2+ Na3+ 8.The valency of carbon is (1 Point) 1 2 3 4 9.The simplest ratio of nitrogen and hydrogen in ammonia is (1 Point) 1:1 1:2 1:3 1:4 10.The ratio of mass of magnesium and oxygen in MgO is (1 Point) 1:2 2:2 3:2 4:2

Answer 1

Explanation:

1)number of electrons in he outer shell

2)HCl

3) hydrogen

4)CuSO4

5)S2

6)??

7)Na+

8)4

9)1:4

10)2:3

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Answer 2

Answer:

1.Valency is the combining capacity of an element.

2.The compound among the following in which both the ions has a valency of 1 is HCl.

3.The gas that does not have a stable gas configuration among the following is hydrogen.

4.The formula of copper sulphate is CuSO4.

5.The monoatomic ion among the following is S2-

6.Zinc exists as Zn2+ in its compound.

7.Sodium exists as Na+ in its compound.

8.The valency of carbon is 4.

9.The simplest ratio of nitrogen and hydrogen in ammonia is 1:3.

10.The ratio of mass of magnesium and oxygen in MgO is 3.2.

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