PLEASE, HELP ME WITH CHEMISTRY! TOMORROW WILL BE TEST!!!1.The atomic radius of alkali and alkaline earth metals by the group frombelow to the top:A.remains unchangedB. IncreasesC. DecreasesD. First increases then decreases2.The metallic property of alkali and alkaline earth metals by the group fromtop to the bottom:A.remains unchangedB. IncreasesC. DecreasesD. First increases then decreases3. The most dense alkali metal:A. KB. NaC. LiD. Rb4. The gas that releases when Na or Ca reacts with water:A. ArB. CI2C. H2D. O25. Which group d-elements most prone to passivation by forming oxide filmA.IIIB B. IVBC. VIBD. B,C6. Which ion of d-element acts only as a oxidizing agentA.Mo+3B.Mn+4C.Mo+6D.Fe+27. Which ion of d-element can acts as a oxidizing and reducing agentdepending on a medium?A.Mn+2 B.Mo+2C.Mn+4 D.Mn+78. Which metal is not considered as a d-elementA. VB. TiC. ZnD. Fe9. Which hydrogen compound is less stableA. CH4B. PbH4C. SiH4B.GeH410. Which one of bellow following reactions is aluminothermyA)2AI + 3/2O2 = AI2O3 + 1676 kjB)Cr2O3 + 2AI = 2Cr + AI2O3 + 539kjC)2AI +3CI2 = 2AICI3D)2AI+ N2= 2AIN11. The gas that released , when aluminium is heated with concentratedsulfuric acid:A) H2B) SO2C) H2SD) NO12. The gas that released , when aluminium is heated with dilute sulfuricacid:A) H2B) SO2C) H2SD) NO13. Which acid at any concentration releases hydrogen gas by reacting withaluminium:A) Sulfuric acidB) Hydrochloric acidC) Nitric acidD) Phosphoric acid14. The gas that is released when aluminium reacts with dilute nitric acid:A) NO2B) H2C) NOD) N215. Graphite is applied:A)in glass cuttersB)for making pencilsC)as a raw material for cement productionD)for the manufacture of confectionery16. Choose graphite characteristic:A)hardest known substanceB)has an ionic crystal latticeC)puts dark traces on paper17. Choose a characteristic of carbonic acid:A)weak dibasic acidB)strong oxidizing agent due to acid residueC)insoluble in water and does not dissociateD)solid substance, well soluble in water18. Choose a property of silicic acid:A)is a solution of gas in waterB)forms three rows of saltsC)infinitely soluble in waterD)refers to weak insoluble acids19. Show amphoteric oxide(s)A) CO2B) SiO2C) PbO2D) SnO220. 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) polytopyB) allotropyC) hydrolysisD) ammonolysis22. Which one is electrical conductiveA) diamondB) graphiteC) Soot23. Which acid is non-detectable with indicatorsA) Carbonic acidB) silicic acidC) sulfuric acidD) nitric acid24. The number of outer shell electrons on a phosphorus and oxygen atomsA)6B)5C)4D) 325. The gas which is released during combustion of ammonia in air withoutcatalystA) nitrogen monoxideB) nitrogen dioxideC) nitrogenB) hydrogen26. The gas which is released by the concentrated nitric acid when it acts as aoxidizing agentA) nitrogen monoxideB) nitrogen dioxideC) nitrogenB) hydrogen27. The gas that is released by all nitrates when they thermally decomposedA) nitrogen monoxideB) nitrogen dioxideC) oxygenB) hydrogen