Question

PLEASE, HELP ME WITH CHEMISTRY! TOMORROW WILL BE TEST!!!

1.The atomic radius of alkali and alkaline earth metals by the group from
below to the top:
A.remains unchanged
B. Increases
C. Decreases
D. First increases then decreases
2.The metallic property of alkali and alkaline earth metals by the group from
top to the bottom:
A.remains unchanged
B. Increases
C. Decreases
D. First increases then decreases
3. The most dense alkali metal:
A. K
B. Na
C. Li
D. Rb
4. The gas that releases when Na or Ca reacts with water:
A. Ar
B. CI2
C. H2
D. O2
5. Which group d-elements most prone to passivation by forming oxide film
A.IIIB
B. IVB
C. VIB
D. B,C
6. Which ion of d-element acts only as a oxidizing agent
A.Mo+3
B.Mn+4
C.Mo+6
D.Fe+2
7. Which ion of d-element can acts as a oxidizing and reducing agent
depending on a medium?
A.Mn+2
B.Mo+2
C.Mn+4
D.Mn+7
8. Which metal is not considered as a d-element
A. V
B. Ti
C. Zn
D. Fe
9. Which hydrogen compound is less stable
A. CH4
B. PbH4
C. SiH4
B.GeH4
10. Which one of bellow following reactions is aluminothermy
A)2AI + 3/2O2 = AI2O3 + 1676 kj
B)Cr2O3 + 2AI = 2Cr + AI2O3 + 539kj
C)2AI +3CI2 = 2AICI3
D)2AI+ N2= 2AIN
11. The gas that released , when aluminium is heated with concentrated
sulfuric acid:
A) H2
B) SO2
C) H2S
D) NO
12. The gas that released , when aluminium is heated with dilute sulfuric
acid:
A) H2
B) SO2
C) H2S
D) NO
13. Which acid at any concentration releases hydrogen gas by reacting with
aluminium:
A) Sulfuric acid
B) Hydrochloric acid
C) Nitric acid
D) Phosphoric acid
14. The gas that is released when aluminium reacts with dilute nitric acid:
A) NO2
B) H2
C) NO
D) N2
15. Graphite is applied:
A)in glass cutters
B)for making pencils
C)as a raw material for cement production
D)for the manufacture of confectionery
16. Choose graphite characteristic:
A)hardest known substance
B)has an ionic crystal lattice
C)puts dark traces on paper
17. Choose a characteristic of carbonic acid:
A)weak dibasic acid
B)strong oxidizing agent due to acid residue
C)insoluble in water and does not dissociate
D)solid substance, well soluble in water
18. Choose a property of silicic acid:
A)is a solution of gas in water
B)forms three rows of salts
C)infinitely soluble in water
D)refers to weak insoluble acids
19. Show amphoteric oxide(s)
A) CO2
B) SiO2
C) PbO2
D) SnO2
20. The most less stable compound.
A)CH4;
B)SiH4,
C)GeH4.
D)SnH4,
21. The existence of a single element in the form of several simple substances:
A) polytopy
B) allotropy
C) hydrolysis
D) ammonolysis
22. Which one is electrical conductive
A) diamond
B) graphite
C) Soot
23. Which acid is non-detectable with indicators
A) Carbonic acid
B) silicic acid
C) sulfuric acid
D) nitric acid
24. The number of outer shell electrons on a phosphorus and oxygen atoms
A)6
B)5
C)4
D) 3
25. The gas which is released during combustion of ammonia in air without
catalyst
A) nitrogen monoxide
B) nitrogen dioxide
C) nitrogen
B) hydrogen
26. The gas which is released by the concentrated nitric acid when it acts as a
oxidizing agent
A) nitrogen monoxide
B) nitrogen dioxide
C) nitrogen
B) hydrogen
27. The gas that is released by all nitrates when they thermally decomposed
A) nitrogen monoxide
B) nitrogen dioxide
C) oxygen
B) hydrogen

Answer 1

Answer:

1 B

2C

Explanation:

sorry but i have 2 answer the que.

Answer 2

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